diff --git a/esphomeyaml/__main__.py b/esphomeyaml/__main__.py
index 55fe6f3aa..c79da1971 100644
--- a/esphomeyaml/__main__.py
+++ b/esphomeyaml/__main__.py
@@ -10,6 +10,7 @@ from esphomeyaml import core, mqtt, wizard, writer, yaml_util, const
 from esphomeyaml.config import core_to_code, get_component, iter_components, read_config
 from esphomeyaml.const import CONF_BAUD_RATE, CONF_ESPHOMEYAML, CONF_HOSTNAME, CONF_LOGGER, \
     CONF_MANUAL_IP, CONF_NAME, CONF_STATIC_IP, CONF_WIFI
+from esphomeyaml.core import ESPHomeYAMLError
 from esphomeyaml.helpers import AssignmentExpression, RawStatement, _EXPRESSIONS, add, add_task, \
     color, get_variable, indent, quote, statement, Expression
 
@@ -132,6 +133,8 @@ def write_cpp(config):
             if isinstance(exp, Expression) and not exp.required:
                 continue
             if isinstance(exp, AssignmentExpression) and not exp.obj.required:
+                if not exp.has_side_effects():
+                    continue
                 exp = exp.rhs
         all_code.append(unicode(statement(exp)))
 
@@ -284,7 +287,11 @@ def main():
         print(yaml_util.dump(config))
         return 0
     elif args.command == 'compile':
-        exit_code = write_cpp(config)
+        try:
+            exit_code = write_cpp(config)
+        except ESPHomeYAMLError as e:
+            _LOGGER.error(e)
+            return 1
         if exit_code != 0:
             return exit_code
         exit_code = compile_program(config)
diff --git a/esphomeyaml/automation.py b/esphomeyaml/automation.py
new file mode 100644
index 000000000..8ef802e52
--- /dev/null
+++ b/esphomeyaml/automation.py
@@ -0,0 +1,223 @@
+import voluptuous as vol
+
+import esphomeyaml.config_validation as cv
+from esphomeyaml.const import CONF_ACTION_ID, CONF_AND, CONF_AUTOMATION_ID, CONF_BLUE, \
+    CONF_BRIGHTNESS, CONF_CONDITION_ID, CONF_DELAY, CONF_EFFECT, CONF_FLASH_LENGTH, CONF_GREEN, \
+    CONF_ID, CONF_IF, CONF_LAMBDA, CONF_MAX, CONF_MIN, CONF_OR, CONF_PAYLOAD, CONF_QOS, \
+    CONF_RANGE, CONF_RED, CONF_RETAIN, CONF_THEN, CONF_TOPIC, CONF_TRANSITION_LENGTH, \
+    CONF_TRIGGER_ID, CONF_WHITE
+from esphomeyaml.core import ESPHomeYAMLError
+from esphomeyaml.helpers import App, ArrayInitializer, Pvariable, TemplateArguments, add, \
+    bool_, esphomelib_ns, float_, get_variable, process_lambda, std_string, templatable, uint32, \
+    uint8
+
+CONF_MQTT_PUBLISH = 'mqtt.publish'
+CONF_LIGHT_TOGGLE = 'light.toggle'
+CONF_LIGHT_TURN_OFF = 'light.turn_off'
+CONF_LIGHT_TURN_ON = 'light.turn_on'
+CONF_SWITCH_TOGGLE = 'switch.toggle'
+CONF_SWITCH_TURN_OFF = 'switch.turn_off'
+CONF_SWITCH_TURN_ON = 'switch.turn_on'
+
+ACTION_KEYS = [CONF_DELAY, CONF_MQTT_PUBLISH, CONF_LIGHT_TOGGLE, CONF_LIGHT_TURN_OFF,
+               CONF_LIGHT_TURN_ON, CONF_SWITCH_TOGGLE, CONF_SWITCH_TURN_OFF, CONF_SWITCH_TURN_ON,
+               CONF_LAMBDA]
+
+ACTIONS_SCHEMA = vol.All(cv.ensure_list, [vol.All({
+    cv.GenerateID('action', CONF_ACTION_ID): cv.register_variable_id,
+    vol.Optional(CONF_DELAY): cv.positive_time_period_milliseconds,
+    vol.Optional(CONF_MQTT_PUBLISH): vol.Schema({
+        vol.Required(CONF_TOPIC): cv.templatable(cv.publish_topic),
+        vol.Required(CONF_PAYLOAD): cv.templatable(cv.mqtt_payload),
+        vol.Optional(CONF_QOS): cv.templatable(cv.mqtt_qos),
+        vol.Optional(CONF_RETAIN): cv.templatable(cv.boolean),
+    }),
+    vol.Optional(CONF_LIGHT_TOGGLE): vol.Schema({
+        vol.Required(CONF_ID): cv.variable_id,
+        vol.Optional(CONF_TRANSITION_LENGTH): cv.templatable(cv.positive_time_period_milliseconds),
+    }),
+    vol.Optional(CONF_LIGHT_TURN_OFF): vol.Schema({
+        vol.Required(CONF_ID): cv.variable_id,
+        vol.Optional(CONF_TRANSITION_LENGTH): cv.templatable(cv.positive_time_period_milliseconds),
+    }),
+    vol.Optional(CONF_LIGHT_TURN_ON): vol.Schema({
+        vol.Required(CONF_ID): cv.variable_id,
+        vol.Optional(CONF_TRANSITION_LENGTH): cv.templatable(cv.positive_time_period_milliseconds),
+        vol.Optional(CONF_FLASH_LENGTH): cv.templatable(cv.positive_time_period_milliseconds),
+        vol.Optional(CONF_BRIGHTNESS): cv.templatable(cv.zero_to_one_float),
+        vol.Optional(CONF_RED): cv.templatable(cv.zero_to_one_float),
+        vol.Optional(CONF_GREEN): cv.templatable(cv.zero_to_one_float),
+        vol.Optional(CONF_BLUE): cv.templatable(cv.zero_to_one_float),
+        vol.Optional(CONF_WHITE): cv.templatable(cv.zero_to_one_float),
+        vol.Optional(CONF_EFFECT): cv.templatable(cv.string),
+    }),
+    vol.Optional(CONF_SWITCH_TOGGLE): vol.Schema({
+        vol.Required(CONF_ID): cv.variable_id,
+    }),
+    vol.Optional(CONF_SWITCH_TURN_OFF): vol.Schema({
+        vol.Required(CONF_ID): cv.variable_id,
+    }),
+    vol.Optional(CONF_SWITCH_TURN_ON): vol.Schema({
+        vol.Required(CONF_ID): cv.variable_id,
+    }),
+    vol.Optional(CONF_LAMBDA): cv.lambda_,
+}, cv.has_at_exactly_one_key(*ACTION_KEYS))])
+
+# pylint: disable=invalid-name
+DelayAction = esphomelib_ns.DelayAction
+LambdaAction = esphomelib_ns.LambdaAction
+Automation = esphomelib_ns.Automation
+
+
+def validate_recursive_condition(value):
+    return CONDITIONS_SCHEMA(value)
+
+
+CONDITION_KEYS = [CONF_AND, CONF_OR, CONF_RANGE, CONF_LAMBDA]
+
+CONDITIONS_SCHEMA = vol.All(cv.ensure_list, [vol.All({
+    cv.GenerateID('condition', CONF_CONDITION_ID): cv.register_variable_id,
+    vol.Optional(CONF_AND): validate_recursive_condition,
+    vol.Optional(CONF_OR): validate_recursive_condition,
+    vol.Optional(CONF_RANGE): vol.All(vol.Schema({
+        vol.Optional(CONF_MIN): vol.Coerce(float),
+        vol.Optional(CONF_MAX): vol.Coerce(float),
+    }), cv.has_at_least_one_key(CONF_MIN, CONF_MAX)),
+    vol.Optional(CONF_LAMBDA): cv.lambda_,
+}), cv.has_at_exactly_one_key(*CONDITION_KEYS)])
+
+# pylint: disable=invalid-name
+AndCondition = esphomelib_ns.AndCondition
+OrCondition = esphomelib_ns.OrCondition
+RangeCondition = esphomelib_ns.RangeCondition
+LambdaCondition = esphomelib_ns.LambdaCondition
+
+AUTOMATION_SCHEMA = vol.Schema({
+    cv.GenerateID('trigger', CONF_TRIGGER_ID): cv.register_variable_id,
+    cv.GenerateID('automation', CONF_AUTOMATION_ID): cv.register_variable_id,
+    vol.Optional(CONF_IF): CONDITIONS_SCHEMA,
+    vol.Required(CONF_THEN): ACTIONS_SCHEMA,
+})
+
+
+def build_condition(config, arg_type):
+    template_arg = TemplateArguments(arg_type)
+    if CONF_AND in config:
+        return AndCondition.new(template_arg, build_conditions(config[CONF_AND], template_arg))
+    if CONF_OR in config:
+        return OrCondition.new(template_arg, build_conditions(config[CONF_OR], template_arg))
+    if CONF_LAMBDA in config:
+        return LambdaCondition.new(template_arg,
+                                   process_lambda(config[CONF_LAMBDA], [(arg_type, 'x')]))
+    if CONF_RANGE in config:
+        conf = config[CONF_RANGE]
+        rhs = RangeCondition.new(template_arg)
+        condition = Pvariable(RangeCondition.template(template_arg), config[CONF_CONDITION_ID], rhs)
+        if CONF_MIN in conf:
+            condition.set_min(templatable(conf[CONF_MIN], arg_type, float_))
+        if CONF_MAX in conf:
+            condition.set_max(templatable(conf[CONF_MAX], arg_type, float_))
+        return condition
+    raise ESPHomeYAMLError(u"Unsupported condition {}".format(config))
+
+
+def build_conditions(config, arg_type):
+    return ArrayInitializer(*[build_condition(x, arg_type) for x in config])
+
+
+def build_action(config, arg_type):
+    from esphomeyaml.components import light, mqtt, switch
+
+    template_arg = TemplateArguments(arg_type)
+    if CONF_DELAY in config:
+        rhs = App.register_component(DelayAction.new(template_arg))
+        action = Pvariable(DelayAction.template(template_arg), config[CONF_ACTION_ID], rhs)
+        add(action.set_delay(templatable(config[CONF_DELAY], arg_type, uint32)))
+        return action
+    elif CONF_LAMBDA in config:
+        rhs = LambdaAction.new(template_arg, process_lambda(config[CONF_LAMBDA], [(arg_type, 'x')]))
+        return Pvariable(LambdaAction.template(template_arg), config[CONF_ACTION_ID], rhs)
+    elif CONF_MQTT_PUBLISH in config:
+        conf = config[CONF_MQTT_PUBLISH]
+        rhs = App.Pget_mqtt_client().Pmake_publish_action()
+        action = Pvariable(mqtt.MQTTPublishAction.template(template_arg), config[CONF_ACTION_ID],
+                           rhs)
+        add(action.set_topic(templatable(conf[CONF_TOPIC], arg_type, std_string)))
+        add(action.set_payload(templatable(conf[CONF_PAYLOAD], arg_type, std_string)))
+        if CONF_QOS in conf:
+            add(action.set_qos(templatable(conf[CONF_QOS], arg_type, uint8)))
+        if CONF_RETAIN in conf:
+            add(action.set_retain(templatable(conf[CONF_RETAIN], arg_type, bool_)))
+        return action
+    elif CONF_LIGHT_TOGGLE in config:
+        conf = config[CONF_LIGHT_TOGGLE]
+        var = get_variable(conf[CONF_ID])
+        rhs = var.make_toggle_action(template_arg)
+        action = Pvariable(light.ToggleAction.template(template_arg), config[CONF_ACTION_ID], rhs)
+        if CONF_TRANSITION_LENGTH in conf:
+            add(action.set_transition_length(
+                templatable(conf[CONF_TRANSITION_LENGTH], arg_type, uint32)
+            ))
+        return action
+    elif CONF_LIGHT_TURN_OFF in config:
+        conf = config[CONF_LIGHT_TURN_OFF]
+        var = get_variable(conf[CONF_ID])
+        rhs = var.make_turn_off_action(template_arg)
+        action = Pvariable(light.TurnOffAction.template(template_arg), config[CONF_ACTION_ID], rhs)
+        if CONF_TRANSITION_LENGTH in conf:
+            add(action.set_transition_length(
+                templatable(conf[CONF_TRANSITION_LENGTH], arg_type, uint32)
+            ))
+        return action
+    elif CONF_LIGHT_TURN_ON in config:
+        conf = config[CONF_LIGHT_TURN_ON]
+        var = get_variable(conf[CONF_ID])
+        rhs = var.make_turn_on_action(template_arg)
+        action = Pvariable(light.TurnOnAction.template(template_arg), config[CONF_ACTION_ID], rhs)
+        if CONF_TRANSITION_LENGTH in conf:
+            add(action.set_transition_length(
+                templatable(conf[CONF_TRANSITION_LENGTH], arg_type, uint32)
+            ))
+        if CONF_FLASH_LENGTH in conf:
+            add(action.set_flash_length(templatable(conf[CONF_FLASH_LENGTH], arg_type, uint32)))
+        if CONF_BRIGHTNESS in conf:
+            add(action.set_brightness(templatable(conf[CONF_BRIGHTNESS], arg_type, float_)))
+        if CONF_RED in conf:
+            add(action.set_red(templatable(conf[CONF_RED], arg_type, float_)))
+        if CONF_GREEN in conf:
+            add(action.set_green(templatable(conf[CONF_GREEN], arg_type, float_)))
+        if CONF_BLUE in conf:
+            add(action.set_blue(templatable(conf[CONF_BLUE], arg_type, float_)))
+        if CONF_WHITE in conf:
+            add(action.set_white(templatable(conf[CONF_WHITE], arg_type, float_)))
+        if CONF_EFFECT in conf:
+            add(action.set_effect(templatable(conf[CONF_EFFECT], arg_type, std_string)))
+        return action
+    elif CONF_SWITCH_TOGGLE in config:
+        conf = config[CONF_SWITCH_TOGGLE]
+        var = get_variable(conf[CONF_ID])
+        rhs = var.make_toggle_action(template_arg)
+        return Pvariable(switch.ToggleAction.template(arg_type), config[CONF_ACTION_ID], rhs)
+    elif CONF_SWITCH_TURN_OFF in config:
+        conf = config[CONF_SWITCH_TURN_OFF]
+        var = get_variable(conf[CONF_ID])
+        rhs = var.make_turn_off_action(template_arg)
+        return Pvariable(switch.TurnOffAction.template(arg_type), config[CONF_ACTION_ID], rhs)
+    elif CONF_SWITCH_TURN_ON in config:
+        conf = config[CONF_SWITCH_TURN_ON]
+        var = get_variable(conf[CONF_ID])
+        rhs = var.make_turn_on_action(template_arg)
+        return Pvariable(switch.TurnOnAction.template(arg_type), config[CONF_ACTION_ID], rhs)
+    raise ESPHomeYAMLError(u"Unsupported action {}".format(config))
+
+
+def build_actions(config, arg_type):
+    return ArrayInitializer(*[build_action(x, arg_type) for x in config])
+
+
+def build_automation(trigger, arg_type, config):
+    rhs = App.make_automation(trigger)
+    obj = Pvariable(Automation.template(arg_type), config[CONF_AUTOMATION_ID], rhs)
+    if CONF_IF in config:
+        add(obj.add_conditions(build_conditions(config[CONF_IF], arg_type)))
+    add(obj.add_actions(build_actions(config[CONF_THEN], arg_type)))
diff --git a/esphomeyaml/components/ads1115.py b/esphomeyaml/components/ads1115.py
index 4d5b1740c..878ffe237 100644
--- a/esphomeyaml/components/ads1115.py
+++ b/esphomeyaml/components/ads1115.py
@@ -1,12 +1,13 @@
 import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
+from esphomeyaml.components import sensor
 from esphomeyaml.const import CONF_ADDRESS, CONF_ID, CONF_RATE
 from esphomeyaml.helpers import App, Pvariable
 
 DEPENDENCIES = ['i2c']
 
-ADS1115_COMPONENT_CLASS = 'sensor::ADS1115Component'
+ADS1115Component = sensor.sensor_ns.ADS1115Component
 
 RATE_REMOVE_MESSAGE = """The rate option has been removed in 1.5.0 and is no longer required."""
 
@@ -23,7 +24,7 @@ CONFIG_SCHEMA = vol.All(cv.ensure_list, [ADS1115_SCHEMA])
 def to_code(config):
     for conf in config:
         rhs = App.make_ads1115_component(conf[CONF_ADDRESS])
-        Pvariable(ADS1115_COMPONENT_CLASS, conf[CONF_ID], rhs)
+        Pvariable(ADS1115Component, conf[CONF_ID], rhs)
 
 
 BUILD_FLAGS = '-DUSE_ADS1115_SENSOR'
diff --git a/esphomeyaml/components/binary_sensor/__init__.py b/esphomeyaml/components/binary_sensor/__init__.py
index bcb396077..138e273c8 100644
--- a/esphomeyaml/components/binary_sensor/__init__.py
+++ b/esphomeyaml/components/binary_sensor/__init__.py
@@ -1,8 +1,11 @@
 import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
-from esphomeyaml.const import CONF_DEVICE_CLASS, CONF_INVERTED, CONF_MQTT_ID
-from esphomeyaml.helpers import add, setup_mqtt_component, App, Pvariable
+from esphomeyaml import automation
+from esphomeyaml.const import CONF_DEVICE_CLASS, CONF_ID, CONF_INVERTED, CONF_MAX_LENGTH, \
+    CONF_MIN_LENGTH, CONF_MQTT_ID, CONF_ON_CLICK, CONF_ON_DOUBLE_CLICK, CONF_ON_PRESS, \
+    CONF_ON_RELEASE, CONF_TRIGGER_ID
+from esphomeyaml.helpers import App, NoArg, Pvariable, add, esphomelib_ns, setup_mqtt_component
 
 DEVICE_CLASSES = [
     '', 'battery', 'cold', 'connectivity', 'door', 'garage_door', 'gas',
@@ -11,39 +14,82 @@ DEVICE_CLASSES = [
     'sound', 'vibration', 'window'
 ]
 
-DEVICE_CLASSES_MSG = "Unknown device class. Must be one of {}".format(', '.join(DEVICE_CLASSES))
-
 PLATFORM_SCHEMA = cv.PLATFORM_SCHEMA.extend({
-    vol.Optional(CONF_INVERTED): cv.boolean,
-    vol.Optional(CONF_DEVICE_CLASS): vol.All(vol.Lower,
-                                             vol.Any(*DEVICE_CLASSES, msg=DEVICE_CLASSES_MSG)),
-})
-
-MQTT_BINARY_SENSOR_SCHEMA = cv.MQTT_COMPONENT_SCHEMA.extend({
 
 })
 
-MQTT_BINARY_SENSOR_ID_SCHEMA = MQTT_BINARY_SENSOR_SCHEMA.extend({
+binary_sensor_ns = esphomelib_ns.namespace('binary_sensor')
+PressTrigger = binary_sensor_ns.PressTrigger
+ReleaseTrigger = binary_sensor_ns.ReleaseTrigger
+ClickTrigger = binary_sensor_ns.ClickTrigger
+DoubleClickTrigger = binary_sensor_ns.DoubleClickTrigger
+BinarySensor = binary_sensor_ns.BinarySensor
+MQTTBinarySensorComponent = binary_sensor_ns.MQTTBinarySensorComponent
+
+BINARY_SENSOR_SCHEMA = cv.MQTT_COMPONENT_SCHEMA.extend({
     cv.GenerateID('mqtt_binary_sensor', CONF_MQTT_ID): cv.register_variable_id,
+    cv.GenerateID('binary_sensor'): cv.register_variable_id,
+    vol.Optional(CONF_INVERTED): cv.boolean,
+    vol.Optional(CONF_DEVICE_CLASS): vol.All(vol.Lower, cv.one_of(DEVICE_CLASSES)),
+    vol.Optional(CONF_ON_PRESS): vol.All(cv.ensure_list, [automation.AUTOMATION_SCHEMA]),
+    vol.Optional(CONF_ON_RELEASE): vol.All(cv.ensure_list, [automation.AUTOMATION_SCHEMA]),
+    vol.Optional(CONF_ON_CLICK): vol.All(cv.ensure_list, [automation.AUTOMATION_SCHEMA.extend({
+        vol.Optional(CONF_MIN_LENGTH, default='50ms'): cv.positive_time_period_milliseconds,
+        vol.Optional(CONF_MAX_LENGTH, default='350ms'): cv.positive_time_period_milliseconds,
+    })]),
+    vol.Optional(CONF_ON_DOUBLE_CLICK):
+        vol.All(cv.ensure_list, [automation.AUTOMATION_SCHEMA.extend({
+            vol.Optional(CONF_MIN_LENGTH, default='50ms'): cv.positive_time_period_milliseconds,
+            vol.Optional(CONF_MAX_LENGTH, default='350ms'): cv.positive_time_period_milliseconds,
+        })]),
 })
 
 
-def setup_binary_sensor(obj, config):
+def setup_binary_sensor_core_(binary_sensor_var, mqtt_var, config):
     if CONF_DEVICE_CLASS in config:
-        add(obj.set_device_class(config[CONF_DEVICE_CLASS]))
+        add(binary_sensor_var.set_device_class(config[CONF_DEVICE_CLASS]))
     if CONF_INVERTED in config:
-        add(obj.set_inverted(config[CONF_INVERTED]))
+        add(binary_sensor_var.set_inverted(config[CONF_INVERTED]))
+
+    for conf in config.get(CONF_ON_PRESS, []):
+        rhs = binary_sensor_var.make_press_trigger()
+        trigger = Pvariable(PressTrigger, conf[CONF_TRIGGER_ID], rhs)
+        automation.build_automation(trigger, NoArg, conf)
+
+    for conf in config.get(CONF_ON_RELEASE, []):
+        rhs = binary_sensor_var.make_release_trigger()
+        trigger = Pvariable(ReleaseTrigger, conf[CONF_TRIGGER_ID], rhs)
+        automation.build_automation(trigger, NoArg, conf)
+
+    for conf in config.get(CONF_ON_CLICK, []):
+        rhs = binary_sensor_var.make_release_trigger(conf[CONF_MIN_LENGTH], conf[CONF_MAX_LENGTH])
+        trigger = Pvariable(ClickTrigger, conf[CONF_TRIGGER_ID], rhs)
+        automation.build_automation(trigger, NoArg, conf)
+
+    for conf in config.get(CONF_ON_DOUBLE_CLICK, []):
+        rhs = binary_sensor_var.make_double_click_trigger(conf[CONF_MIN_LENGTH],
+                                                          conf[CONF_MAX_LENGTH])
+        trigger = Pvariable(DoubleClickTrigger, conf[CONF_TRIGGER_ID], rhs)
+        automation.build_automation(trigger, NoArg, conf)
+
+    setup_mqtt_component(mqtt_var, config)
 
 
-def setup_mqtt_binary_sensor(obj, config):
-    setup_mqtt_component(obj, config)
+def setup_binary_sensor(binary_sensor_obj, mqtt_obj, config):
+    binary_sensor_var = Pvariable(BinarySensor, config[CONF_ID], binary_sensor_obj,
+                                  has_side_effects=False)
+    mqtt_var = Pvariable(MQTTBinarySensorComponent, config[CONF_MQTT_ID], mqtt_obj,
+                         has_side_effects=False)
+    setup_binary_sensor_core_(binary_sensor_var, mqtt_var, config)
 
 
 def register_binary_sensor(var, config):
-    setup_binary_sensor(var, config)
-    rhs = App.register_binary_sensor(var)
-    mqtt_sensor = Pvariable('binary_sensor::MQTTBinarySensorComponent', config[CONF_MQTT_ID], rhs)
-    setup_mqtt_binary_sensor(mqtt_sensor, config)
+    binary_sensor_var = Pvariable(BinarySensor, config[CONF_ID], var,
+                                  has_side_effects=True)
+    rhs = App.register_binary_sensor(binary_sensor_var)
+    mqtt_var = Pvariable(MQTTBinarySensorComponent, config[CONF_MQTT_ID], rhs,
+                         has_side_effects=True)
+    setup_binary_sensor_core_(binary_sensor_var, mqtt_var, config)
 
 
 BUILD_FLAGS = '-DUSE_BINARY_SENSOR'
diff --git a/esphomeyaml/components/binary_sensor/esp32_ble.py b/esphomeyaml/components/binary_sensor/esp32_ble.py
index f0019d335..0f58c05fa 100644
--- a/esphomeyaml/components/binary_sensor/esp32_ble.py
+++ b/esphomeyaml/components/binary_sensor/esp32_ble.py
@@ -2,9 +2,10 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import binary_sensor
-from esphomeyaml.const import CONF_ID, CONF_MAC_ADDRESS, CONF_NAME, ESP_PLATFORM_ESP32
+from esphomeyaml.components.esp32_ble import ESP32BLETracker
+from esphomeyaml.const import CONF_MAC_ADDRESS, CONF_NAME, ESP_PLATFORM_ESP32
 from esphomeyaml.core import HexInt, MACAddress
-from esphomeyaml.helpers import ArrayInitializer, Pvariable, get_variable
+from esphomeyaml.helpers import ArrayInitializer, get_variable
 
 ESP_PLATFORMS = [ESP_PLATFORM_ESP32]
 DEPENDENCIES = ['esp32_ble']
@@ -28,17 +29,15 @@ def validate_mac(value):
 
 
 PLATFORM_SCHEMA = binary_sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('esp32_ble_device'): cv.register_variable_id,
     vol.Required(CONF_MAC_ADDRESS): validate_mac,
-}).extend(binary_sensor.MQTT_BINARY_SENSOR_ID_SCHEMA.schema)
+}).extend(binary_sensor.BINARY_SENSOR_SCHEMA.schema)
 
 
 def to_code(config):
-    hub = get_variable(None, type='ESP32BLETracker')
+    hub = get_variable(None, type=ESP32BLETracker)
     addr = [HexInt(i) for i in config[CONF_MAC_ADDRESS].parts]
     rhs = hub.make_device(config[CONF_NAME], ArrayInitializer(*addr, multiline=False))
-    device = Pvariable('ESP32BLEDevice', config[CONF_ID], rhs)
-    binary_sensor.register_binary_sensor(device, config)
+    binary_sensor.register_binary_sensor(rhs, config)
 
 
 BUILD_FLAGS = '-DUSE_ESP32_BLE_TRACKER'
diff --git a/esphomeyaml/components/binary_sensor/esp32_touch.py b/esphomeyaml/components/binary_sensor/esp32_touch.py
index f69dd271a..321aef22a 100644
--- a/esphomeyaml/components/binary_sensor/esp32_touch.py
+++ b/esphomeyaml/components/binary_sensor/esp32_touch.py
@@ -2,8 +2,9 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import binary_sensor
-from esphomeyaml.const import CONF_ID, CONF_NAME, CONF_PIN, CONF_THRESHOLD, ESP_PLATFORM_ESP32
-from esphomeyaml.helpers import Pvariable, RawExpression, get_variable
+from esphomeyaml.components.esp32_touch import ESP32TouchComponent
+from esphomeyaml.const import CONF_NAME, CONF_PIN, CONF_THRESHOLD, ESP_PLATFORM_ESP32
+from esphomeyaml.helpers import get_variable, global_ns
 from esphomeyaml.pins import validate_gpio_pin
 
 ESP_PLATFORMS = [ESP_PLATFORM_ESP32]
@@ -11,16 +12,16 @@ ESP_PLATFORMS = [ESP_PLATFORM_ESP32]
 DEPENDENCIES = ['esp32_touch']
 
 TOUCH_PADS = {
-    4: 'TOUCH_PAD_NUM0',
-    0: 'TOUCH_PAD_NUM1',
-    2: 'TOUCH_PAD_NUM2',
-    15: 'TOUCH_PAD_NUM3',
-    13: 'TOUCH_PAD_NUM4',
-    12: 'TOUCH_PAD_NUM5',
-    14: 'TOUCH_PAD_NUM6',
-    27: 'TOUCH_PAD_NUM7',
-    33: 'TOUCH_PAD_NUM8',
-    32: 'TOUCH_PAD_NUM9',
+    4: global_ns.TOUCH_PAD_NUM0,
+    0: global_ns.TOUCH_PAD_NUM1,
+    2: global_ns.TOUCH_PAD_NUM2,
+    15: global_ns.TOUCH_PAD_NUM3,
+    13: global_ns.TOUCH_PAD_NUM4,
+    12: global_ns.TOUCH_PAD_NUM5,
+    14: global_ns.TOUCH_PAD_NUM6,
+    27: global_ns.TOUCH_PAD_NUM7,
+    33: global_ns.TOUCH_PAD_NUM8,
+    32: global_ns.TOUCH_PAD_NUM9,
 }
 
 
@@ -32,18 +33,16 @@ def validate_touch_pad(value):
 
 
 PLATFORM_SCHEMA = binary_sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('esp32_touch_pad'): cv.register_variable_id,
     vol.Required(CONF_PIN): validate_touch_pad,
     vol.Required(CONF_THRESHOLD): cv.uint16_t,
-}).extend(binary_sensor.MQTT_BINARY_SENSOR_ID_SCHEMA.schema)
+}).extend(binary_sensor.BINARY_SENSOR_SCHEMA.schema)
 
 
 def to_code(config):
-    hub = get_variable(None, type='binary_sensor::ESP32TouchComponent')
-    touch_pad = RawExpression(TOUCH_PADS[config[CONF_PIN]])
+    hub = get_variable(None, type=ESP32TouchComponent)
+    touch_pad = TOUCH_PADS[config[CONF_PIN]]
     rhs = hub.make_touch_pad(config[CONF_NAME], touch_pad, config[CONF_THRESHOLD])
-    device = Pvariable('ESP32TouchBinarySensor', config[CONF_ID], rhs)
-    binary_sensor.register_binary_sensor(device, config)
+    binary_sensor.register_binary_sensor(rhs, config)
 
 
 BUILD_FLAGS = '-DUSE_ESP32_TOUCH_BINARY_SENSOR'
diff --git a/esphomeyaml/components/binary_sensor/gpio.py b/esphomeyaml/components/binary_sensor/gpio.py
index 04e5b9a6f..3da3bde16 100644
--- a/esphomeyaml/components/binary_sensor/gpio.py
+++ b/esphomeyaml/components/binary_sensor/gpio.py
@@ -3,23 +3,22 @@ import voluptuous as vol
 import esphomeyaml.config_validation as cv
 from esphomeyaml import pins
 from esphomeyaml.components import binary_sensor
-from esphomeyaml.const import CONF_ID, CONF_INVERTED, CONF_NAME, CONF_PIN
-from esphomeyaml.helpers import App, add, variable, gpio_input_pin_expression
+from esphomeyaml.const import CONF_MAKE_ID, CONF_NAME, CONF_PIN
+from esphomeyaml.helpers import App, gpio_input_pin_expression, variable, Application
 
 PLATFORM_SCHEMA = binary_sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('gpio_binary_sensor'): cv.register_variable_id,
+    cv.GenerateID('gpio_binary_sensor', CONF_MAKE_ID): cv.register_variable_id,
     vol.Required(CONF_PIN): pins.GPIO_INPUT_PIN_SCHEMA
-}).extend(binary_sensor.MQTT_BINARY_SENSOR_SCHEMA.schema)
+}).extend(binary_sensor.BINARY_SENSOR_SCHEMA.schema)
+
+MakeGPIOBinarySensor = Application.MakeGPIOBinarySensor
 
 
 def to_code(config):
     rhs = App.make_gpio_binary_sensor(config[CONF_NAME],
                                       gpio_input_pin_expression(config[CONF_PIN]))
-    gpio = variable('Application::MakeGPIOBinarySensor', config[CONF_ID], rhs)
-    if CONF_INVERTED in config:
-        add(gpio.Pgpio.set_inverted(config[CONF_INVERTED]))
-    binary_sensor.setup_binary_sensor(gpio.Pgpio, config)
-    binary_sensor.setup_mqtt_binary_sensor(gpio.Pmqtt, config)
+    gpio = variable(MakeGPIOBinarySensor, config[CONF_MAKE_ID], rhs)
+    binary_sensor.setup_binary_sensor(gpio.Pgpio, gpio.Pmqtt, config)
 
 
 BUILD_FLAGS = '-DUSE_GPIO_BINARY_SENSOR'
diff --git a/esphomeyaml/components/binary_sensor/status.py b/esphomeyaml/components/binary_sensor/status.py
index 5a48e1e67..e3c94ec4e 100644
--- a/esphomeyaml/components/binary_sensor/status.py
+++ b/esphomeyaml/components/binary_sensor/status.py
@@ -1,20 +1,21 @@
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import binary_sensor
-from esphomeyaml.const import CONF_ID, CONF_NAME
-from esphomeyaml.helpers import App, variable
+from esphomeyaml.const import CONF_MAKE_ID, CONF_NAME
+from esphomeyaml.helpers import App, Application, variable
 
 DEPENDENCIES = ['mqtt']
 
 PLATFORM_SCHEMA = binary_sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('status_binary_sensor'): cv.register_variable_id,
-}).extend(binary_sensor.MQTT_BINARY_SENSOR_SCHEMA.schema)
+    cv.GenerateID('status_binary_sensor', CONF_MAKE_ID): cv.register_variable_id,
+}).extend(binary_sensor.BINARY_SENSOR_SCHEMA.schema)
+
+MakeStatusBinarySensor = Application.MakeStatusBinarySensor
 
 
 def to_code(config):
     rhs = App.make_status_binary_sensor(config[CONF_NAME])
-    status = variable('Application::MakeStatusBinarySensor', config[CONF_ID], rhs)
-    binary_sensor.setup_binary_sensor(status.Pstatus, config)
-    binary_sensor.setup_mqtt_binary_sensor(status.Pmqtt, config)
+    status = variable(MakeStatusBinarySensor, config[CONF_MAKE_ID], rhs)
+    binary_sensor.setup_binary_sensor(status.Pstatus, status.Pmqtt, config)
 
 
 BUILD_FLAGS = '-DUSE_STATUS_BINARY_SENSOR'
diff --git a/esphomeyaml/components/binary_sensor/template.py b/esphomeyaml/components/binary_sensor/template.py
new file mode 100644
index 000000000..70c556ac0
--- /dev/null
+++ b/esphomeyaml/components/binary_sensor/template.py
@@ -0,0 +1,23 @@
+import voluptuous as vol
+
+import esphomeyaml.config_validation as cv
+from esphomeyaml.components import binary_sensor
+from esphomeyaml.const import CONF_LAMBDA, CONF_MAKE_ID, CONF_NAME
+from esphomeyaml.helpers import App, Application, process_lambda, variable
+
+PLATFORM_SCHEMA = binary_sensor.PLATFORM_SCHEMA.extend({
+    cv.GenerateID('template_binary_sensor', CONF_MAKE_ID): cv.register_variable_id,
+    vol.Required(CONF_LAMBDA): cv.lambda_,
+}).extend(binary_sensor.BINARY_SENSOR_SCHEMA.schema)
+
+MakeTemplateBinarySensor = Application.MakeTemplateBinarySensor
+
+
+def to_code(config):
+    template_ = process_lambda(config[CONF_LAMBDA], [])
+    rhs = App.make_template_binary_sensor(config[CONF_NAME], template_)
+    make = variable(MakeTemplateBinarySensor, config[CONF_MAKE_ID], rhs)
+    binary_sensor.setup_binary_sensor(make.Ptemplate_, make.Pmqtt, config)
+
+
+BUILD_FLAGS = '-DUSE_TEMPLATE_BINARY_SENSOR'
diff --git a/esphomeyaml/components/cover/__init__.py b/esphomeyaml/components/cover/__init__.py
new file mode 100644
index 000000000..2a80a8891
--- /dev/null
+++ b/esphomeyaml/components/cover/__init__.py
@@ -0,0 +1,33 @@
+import esphomeyaml.config_validation as cv
+from esphomeyaml.const import CONF_ID, CONF_MQTT_ID
+from esphomeyaml.helpers import Pvariable, esphomelib_ns, setup_mqtt_component
+
+PLATFORM_SCHEMA = cv.PLATFORM_SCHEMA.extend({
+
+})
+
+COVER_SCHEMA = cv.MQTT_COMMAND_COMPONENT_SCHEMA.extend({
+    cv.GenerateID('cover'): cv.register_variable_id,
+    cv.GenerateID('mqtt_cover', CONF_MQTT_ID): cv.register_variable_id,
+})
+
+cover_ns = esphomelib_ns.namespace('cover')
+Cover = cover_ns.Cover
+MQTTCoverComponent = cover_ns.MQTTCoverComponent
+CoverState = cover_ns.CoverState
+COVER_OPEN = cover_ns.COVER_OPEN
+COVER_CLOSED = cover_ns.COVER_CLOSED
+
+
+def setup_cover_core_(cover_var, mqtt_var, config):
+    setup_mqtt_component(mqtt_var, config)
+
+
+def setup_cover(cover_obj, mqtt_obj, config):
+    cover_var = Pvariable(Cover, config[CONF_ID], cover_obj, has_side_effects=False)
+    mqtt_var = Pvariable(MQTTCoverComponent, config[CONF_MQTT_ID], mqtt_obj,
+                         has_side_effects=False)
+    setup_cover_core_(cover_var, mqtt_var, config)
+
+
+BUILD_FLAGS = '-DUSE_COVER'
diff --git a/esphomeyaml/components/cover/template.py b/esphomeyaml/components/cover/template.py
new file mode 100644
index 000000000..eb31153e6
--- /dev/null
+++ b/esphomeyaml/components/cover/template.py
@@ -0,0 +1,39 @@
+import voluptuous as vol
+
+import esphomeyaml.config_validation as cv
+from esphomeyaml import automation
+from esphomeyaml.components import cover
+from esphomeyaml.const import CONF_CLOSE_ACTION, CONF_LAMBDA, CONF_MAKE_ID, CONF_NAME, \
+    CONF_OPEN_ACTION, CONF_STOP_ACTION
+from esphomeyaml.helpers import App, Application, NoArg, add, process_lambda, variable
+
+PLATFORM_SCHEMA = cover.PLATFORM_SCHEMA.extend({
+    cv.GenerateID('template_cover', CONF_MAKE_ID): cv.register_variable_id,
+    vol.Required(CONF_LAMBDA): cv.lambda_,
+    vol.Optional(CONF_OPEN_ACTION): automation.ACTIONS_SCHEMA,
+    vol.Optional(CONF_CLOSE_ACTION): automation.ACTIONS_SCHEMA,
+    vol.Optional(CONF_STOP_ACTION): automation.ACTIONS_SCHEMA,
+}).extend(cover.COVER_SCHEMA.schema)
+
+MakeTemplateCover = Application.MakeTemplateCover
+
+
+def to_code(config):
+    template_ = process_lambda(config[CONF_LAMBDA], [])
+    rhs = App.make_template_cover(config[CONF_NAME], template_)
+    make = variable(MakeTemplateCover, config[CONF_MAKE_ID], rhs)
+
+    if CONF_OPEN_ACTION in config:
+        actions = automation.build_actions(config[CONF_OPEN_ACTION], NoArg)
+        add(make.Ptemplate_.add_open_actions(actions))
+    if CONF_CLOSE_ACTION in config:
+        actions = automation.build_actions(config[CONF_CLOSE_ACTION], NoArg)
+        add(make.Ptemplate_.add_close_actions(actions))
+    if CONF_STOP_ACTION in config:
+        actions = automation.build_actions(config[CONF_STOP_ACTION], NoArg)
+        add(make.Ptemplate_.add_stop_actions(actions))
+
+    cover.setup_cover(make.Ptemplate_, make.Pmqtt, config)
+
+
+BUILD_FLAGS = '-DUSE_TEMPLATE_COVER'
diff --git a/esphomeyaml/components/dallas.py b/esphomeyaml/components/dallas.py
index c4732aa25..27e5b10e5 100644
--- a/esphomeyaml/components/dallas.py
+++ b/esphomeyaml/components/dallas.py
@@ -2,10 +2,11 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml import pins
+from esphomeyaml.components import sensor
 from esphomeyaml.const import CONF_ID, CONF_PIN, CONF_UPDATE_INTERVAL
 from esphomeyaml.helpers import App, Pvariable
 
-DALLAS_COMPONENT_CLASS = 'sensor::DallasComponent'
+DallasComponent = sensor.sensor_ns.DallasComponent
 
 CONFIG_SCHEMA = vol.All(cv.ensure_list, [vol.Schema({
     cv.GenerateID('dallas'): cv.register_variable_id,
@@ -17,7 +18,7 @@ CONFIG_SCHEMA = vol.All(cv.ensure_list, [vol.Schema({
 def to_code(config):
     for conf in config:
         rhs = App.make_dallas_component(conf[CONF_PIN], conf.get(CONF_UPDATE_INTERVAL))
-        Pvariable(DALLAS_COMPONENT_CLASS, conf[CONF_ID], rhs)
+        Pvariable(DallasComponent, conf[CONF_ID], rhs)
 
 
 BUILD_FLAGS = '-DUSE_DALLAS_SENSOR'
diff --git a/esphomeyaml/components/deep_sleep.py b/esphomeyaml/components/deep_sleep.py
index 1818897e4..52687d9b2 100644
--- a/esphomeyaml/components/deep_sleep.py
+++ b/esphomeyaml/components/deep_sleep.py
@@ -3,7 +3,7 @@ import voluptuous as vol
 from esphomeyaml import config_validation as cv, pins
 from esphomeyaml.const import CONF_ID, CONF_NUMBER, CONF_RUN_CYCLES, CONF_RUN_DURATION, \
     CONF_SLEEP_DURATION, CONF_WAKEUP_PIN
-from esphomeyaml.helpers import App, Pvariable, add, gpio_input_pin_expression
+from esphomeyaml.helpers import App, Pvariable, add, gpio_input_pin_expression, esphomelib_ns
 
 
 def validate_pin_number(value):
@@ -23,10 +23,12 @@ CONFIG_SCHEMA = vol.Schema({
     vol.Optional(CONF_RUN_DURATION): cv.positive_time_period_milliseconds,
 })
 
+DeepSleepComponent = esphomelib_ns.DeepSleepComponent
+
 
 def to_code(config):
     rhs = App.make_deep_sleep_component()
-    deep_sleep = Pvariable('DeepSleepComponent', config[CONF_ID], rhs)
+    deep_sleep = Pvariable(DeepSleepComponent, config[CONF_ID], rhs)
     if CONF_SLEEP_DURATION in config:
         add(deep_sleep.set_sleep_duration(config[CONF_SLEEP_DURATION]))
     if CONF_WAKEUP_PIN in config:
diff --git a/esphomeyaml/components/esp32_ble.py b/esphomeyaml/components/esp32_ble.py
index 29de17955..5a2620117 100644
--- a/esphomeyaml/components/esp32_ble.py
+++ b/esphomeyaml/components/esp32_ble.py
@@ -2,7 +2,7 @@ import voluptuous as vol
 
 from esphomeyaml import config_validation as cv
 from esphomeyaml.const import CONF_ID, CONF_SCAN_INTERVAL, ESP_PLATFORM_ESP32
-from esphomeyaml.helpers import App, Pvariable, add
+from esphomeyaml.helpers import App, Pvariable, add, esphomelib_ns
 
 ESP_PLATFORMS = [ESP_PLATFORM_ESP32]
 
@@ -11,10 +11,12 @@ CONFIG_SCHEMA = vol.Schema({
     vol.Optional(CONF_SCAN_INTERVAL): cv.positive_time_period_milliseconds,
 })
 
+ESP32BLETracker = esphomelib_ns.ESP32BLETracker
+
 
 def to_code(config):
     rhs = App.make_esp32_ble_tracker()
-    ble = Pvariable('ESP32BLETracker', config[CONF_ID], rhs)
+    ble = Pvariable(ESP32BLETracker, config[CONF_ID], rhs)
     if CONF_SCAN_INTERVAL in config:
         add(ble.set_scan_interval(config[CONF_SCAN_INTERVAL]))
 
diff --git a/esphomeyaml/components/esp32_touch.py b/esphomeyaml/components/esp32_touch.py
index 3d5b6790b..b77c0d012 100644
--- a/esphomeyaml/components/esp32_touch.py
+++ b/esphomeyaml/components/esp32_touch.py
@@ -1,11 +1,12 @@
 import voluptuous as vol
 
 from esphomeyaml import config_validation as cv
+from esphomeyaml.components import binary_sensor
 from esphomeyaml.const import CONF_ID, CONF_SETUP_MODE, CONF_IIR_FILTER, \
     CONF_SLEEP_DURATION, CONF_MEASUREMENT_DURATION, CONF_LOW_VOLTAGE_REFERENCE, \
     CONF_HIGH_VOLTAGE_REFERENCE, CONF_VOLTAGE_ATTENUATION, ESP_PLATFORM_ESP32
 from esphomeyaml.core import TimePeriod
-from esphomeyaml.helpers import App, Pvariable, add
+from esphomeyaml.helpers import App, Pvariable, add, global_ns
 
 ESP_PLATFORMS = [ESP_PLATFORM_ESP32]
 
@@ -17,29 +18,27 @@ def validate_voltage(values):
         value = cv.string(value)
         if not value.endswith('V'):
             value += 'V'
-        if value not in values:
-            raise vol.Invalid('Must be one of {}'.format(values))
-        return value
+        return cv.one_of(values)(value)
     return validator
 
 
 LOW_VOLTAGE_REFERENCE = {
-    '0.5V': 'TOUCH_LVOLT_0V5',
-    '0.6V': 'TOUCH_LVOLT_0V6',
-    '0.7V': 'TOUCH_LVOLT_0V7',
-    '0.8V': 'TOUCH_LVOLT_0V8',
+    '0.5V': global_ns.TOUCH_LVOLT_0V5,
+    '0.6V': global_ns.TOUCH_LVOLT_0V6,
+    '0.7V': global_ns.TOUCH_LVOLT_0V7,
+    '0.8V': global_ns.TOUCH_LVOLT_0V8,
 }
 HIGH_VOLTAGE_REFERENCE = {
-    '2.4V': 'TOUCH_HVOLT_2V4',
-    '2.5V': 'TOUCH_HVOLT_2V5',
-    '2.6V': 'TOUCH_HVOLT_2V6',
-    '2.7V': 'TOUCH_HVOLT_2V7',
+    '2.4V': global_ns.TOUCH_HVOLT_2V4,
+    '2.5V': global_ns.TOUCH_HVOLT_2V5,
+    '2.6V': global_ns.TOUCH_HVOLT_2V6,
+    '2.7V': global_ns.TOUCH_HVOLT_2V7,
 }
 VOLTAGE_ATTENUATION = {
-    '1.5V': 'TOUCH_HVOLT_ATTEN_1V5',
-    '1V': 'TOUCH_HVOLT_ATTEN_1V',
-    '0.5V': 'TOUCH_HVOLT_ATTEN_0V5',
-    '0V': 'TOUCH_HVOLT_ATTEN_0V',
+    '1.5V': global_ns.TOUCH_HVOLT_ATTEN_1V5,
+    '1V': global_ns.TOUCH_HVOLT_ATTEN_1V,
+    '0.5V': global_ns.TOUCH_HVOLT_ATTEN_0V5,
+    '0V': global_ns.TOUCH_HVOLT_ATTEN_0V,
 }
 
 CONFIG_SCHEMA = vol.Schema({
@@ -55,10 +54,12 @@ CONFIG_SCHEMA = vol.Schema({
     vol.Optional(CONF_VOLTAGE_ATTENUATION): validate_voltage(VOLTAGE_ATTENUATION),
 })
 
+ESP32TouchComponent = binary_sensor.binary_sensor_ns.ESP32TouchComponent
+
 
 def to_code(config):
     rhs = App.make_esp32_touch_component()
-    touch = Pvariable('binary_sensor::ESP32TouchComponent', config[CONF_ID], rhs)
+    touch = Pvariable(ESP32TouchComponent, config[CONF_ID], rhs)
     if CONF_SETUP_MODE in config:
         add(touch.set_setup_mode(config[CONF_SETUP_MODE]))
     if CONF_IIR_FILTER in config:
diff --git a/esphomeyaml/components/fan/__init__.py b/esphomeyaml/components/fan/__init__.py
index ef2520026..18b302178 100644
--- a/esphomeyaml/components/fan/__init__.py
+++ b/esphomeyaml/components/fan/__init__.py
@@ -1,26 +1,43 @@
 import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
-from esphomeyaml.const import CONF_OSCILLATION_COMMAND_TOPIC, CONF_OSCILLATION_STATE_TOPIC, \
-    CONF_SPEED_COMMAND_TOPIC, CONF_SPEED_STATE_TOPIC
-from esphomeyaml.helpers import add, setup_mqtt_component
+from esphomeyaml.const import CONF_ID, CONF_MQTT_ID, CONF_OSCILLATION_COMMAND_TOPIC, \
+    CONF_OSCILLATION_STATE_TOPIC, CONF_SPEED_COMMAND_TOPIC, CONF_SPEED_STATE_TOPIC
+from esphomeyaml.helpers import Application, Pvariable, add, esphomelib_ns, setup_mqtt_component
 
 PLATFORM_SCHEMA = cv.PLATFORM_SCHEMA.extend({
+
+})
+
+FAN_SCHEMA = cv.MQTT_COMMAND_COMPONENT_SCHEMA.extend({
+    cv.GenerateID('fan'): cv.register_variable_id,
+    cv.GenerateID('mqtt_fan', CONF_MQTT_ID): cv.register_variable_id,
     vol.Optional(CONF_OSCILLATION_STATE_TOPIC): cv.publish_topic,
     vol.Optional(CONF_OSCILLATION_COMMAND_TOPIC): cv.subscribe_topic,
-}).extend(cv.MQTT_COMMAND_COMPONENT_SCHEMA.schema)
+})
+
+fan_ns = esphomelib_ns.namespace('fan')
+FanState = fan_ns.FanState
+MQTTFanComponent = fan_ns.MQTTFanComponent
+MakeFan = Application.MakeFan
 
 
-def setup_mqtt_fan(obj, config):
+def setup_fan_core_(fan_var, mqtt_var, config):
     if CONF_OSCILLATION_STATE_TOPIC in config:
-        add(obj.set_custom_oscillation_state_topic(config[CONF_OSCILLATION_STATE_TOPIC]))
+        add(mqtt_var.set_custom_oscillation_state_topic(config[CONF_OSCILLATION_STATE_TOPIC]))
     if CONF_OSCILLATION_COMMAND_TOPIC in config:
-        add(obj.set_custom_oscillation_command_topic(config[CONF_OSCILLATION_COMMAND_TOPIC]))
+        add(mqtt_var.set_custom_oscillation_command_topic(config[CONF_OSCILLATION_COMMAND_TOPIC]))
     if CONF_SPEED_STATE_TOPIC in config:
-        add(obj.set_custom_speed_state_topic(config[CONF_SPEED_STATE_TOPIC]))
+        add(mqtt_var.set_custom_speed_state_topic(config[CONF_SPEED_STATE_TOPIC]))
     if CONF_SPEED_COMMAND_TOPIC in config:
-        add(obj.set_custom_speed_command_topic(config[CONF_SPEED_COMMAND_TOPIC]))
-    setup_mqtt_component(obj, config)
+        add(mqtt_var.set_custom_speed_command_topic(config[CONF_SPEED_COMMAND_TOPIC]))
+    setup_mqtt_component(mqtt_var, config)
+
+
+def setup_fan(fan_obj, mqtt_obj, config):
+    fan_var = Pvariable(FanState, config[CONF_ID], fan_obj, has_side_effects=False)
+    mqtt_var = Pvariable(MQTTFanComponent, config[CONF_MQTT_ID], mqtt_obj, has_side_effects=False)
+    setup_fan_core_(fan_var, mqtt_var, config)
 
 
 BUILD_FLAGS = '-DUSE_FAN'
diff --git a/esphomeyaml/components/fan/binary.py b/esphomeyaml/components/fan/binary.py
index b62dc9f1b..8d5a5b912 100644
--- a/esphomeyaml/components/fan/binary.py
+++ b/esphomeyaml/components/fan/binary.py
@@ -2,22 +2,23 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import fan
-from esphomeyaml.const import CONF_ID, CONF_NAME, CONF_OSCILLATION_OUTPUT, CONF_OUTPUT
+from esphomeyaml.const import CONF_MAKE_ID, CONF_NAME, CONF_OSCILLATION_OUTPUT, CONF_OUTPUT
 from esphomeyaml.helpers import App, add, get_variable, variable
 
 PLATFORM_SCHEMA = fan.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('binary_fan'): cv.register_variable_id,
+    cv.GenerateID('binary_fan', CONF_MAKE_ID): cv.register_variable_id,
     vol.Required(CONF_OUTPUT): cv.variable_id,
     vol.Optional(CONF_OSCILLATION_OUTPUT): cv.variable_id,
-})
+}).extend(fan.FAN_SCHEMA.schema)
 
 
 def to_code(config):
     output = get_variable(config[CONF_OUTPUT])
     rhs = App.make_fan(config[CONF_NAME])
-    fan_struct = variable('Application::MakeFan', config[CONF_ID], rhs)
+    fan_struct = variable(fan.MakeFan, config[CONF_MAKE_ID], rhs)
     add(fan_struct.Poutput.set_binary(output))
     if CONF_OSCILLATION_OUTPUT in config:
         oscillation_output = get_variable(config[CONF_OSCILLATION_OUTPUT])
         add(fan_struct.Poutput.set_oscillation(oscillation_output))
-    fan.setup_mqtt_fan(fan_struct.Pmqtt, config)
+
+    fan.setup_fan(fan_struct.Pstate, fan_struct.Pmqtt, config)
diff --git a/esphomeyaml/components/fan/speed.py b/esphomeyaml/components/fan/speed.py
index 0d94aacac..d2e4be49e 100644
--- a/esphomeyaml/components/fan/speed.py
+++ b/esphomeyaml/components/fan/speed.py
@@ -2,13 +2,13 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import fan
-from esphomeyaml.const import CONF_HIGH, CONF_ID, CONF_LOW, \
-    CONF_MEDIUM, CONF_NAME, CONF_OSCILLATION_OUTPUT, CONF_OUTPUT, CONF_SPEED, \
-    CONF_SPEED_COMMAND_TOPIC, CONF_SPEED_STATE_TOPIC
+from esphomeyaml.const import CONF_HIGH, CONF_LOW, CONF_MAKE_ID, CONF_MEDIUM, CONF_NAME, \
+    CONF_OSCILLATION_OUTPUT, CONF_OUTPUT, CONF_SPEED, CONF_SPEED_COMMAND_TOPIC, \
+    CONF_SPEED_STATE_TOPIC
 from esphomeyaml.helpers import App, add, get_variable, variable
 
 PLATFORM_SCHEMA = fan.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('speed_fan'): cv.register_variable_id,
+    cv.GenerateID('speed_fan', CONF_MAKE_ID): cv.register_variable_id,
     vol.Required(CONF_OUTPUT): cv.variable_id,
     vol.Optional(CONF_SPEED_STATE_TOPIC): cv.publish_topic,
     vol.Optional(CONF_SPEED_COMMAND_TOPIC): cv.subscribe_topic,
@@ -18,13 +18,13 @@ PLATFORM_SCHEMA = fan.PLATFORM_SCHEMA.extend({
         vol.Required(CONF_MEDIUM): cv.zero_to_one_float,
         vol.Required(CONF_HIGH): cv.zero_to_one_float,
     }),
-})
+}).extend(fan.FAN_SCHEMA.schema)
 
 
 def to_code(config):
     output = get_variable(config[CONF_OUTPUT])
     rhs = App.make_fan(config[CONF_NAME])
-    fan_struct = variable('Application::MakeFan', config[CONF_ID], rhs)
+    fan_struct = variable(fan.MakeFan, config[CONF_MAKE_ID], rhs)
     if CONF_SPEED in config:
         speeds = config[CONF_SPEED]
         add(fan_struct.Poutput.set_speed(output, 0.0,
@@ -37,4 +37,5 @@ def to_code(config):
     if CONF_OSCILLATION_OUTPUT in config:
         oscillation_output = get_variable(config[CONF_OSCILLATION_OUTPUT])
         add(fan_struct.Poutput.set_oscillation(oscillation_output))
-    fan.setup_mqtt_fan(fan_struct.Pmqtt, config)
+
+    fan.setup_fan(fan_struct.Pstate, fan_struct.Pmqtt, config)
diff --git a/esphomeyaml/components/i2c.py b/esphomeyaml/components/i2c.py
index b9dfc5a31..b3b563d9b 100644
--- a/esphomeyaml/components/i2c.py
+++ b/esphomeyaml/components/i2c.py
@@ -4,7 +4,7 @@ import esphomeyaml.config_validation as cv
 from esphomeyaml import pins
 from esphomeyaml.const import CONF_FREQUENCY, CONF_SCL, CONF_SDA, CONF_SCAN, CONF_ID, \
     CONF_RECEIVE_TIMEOUT
-from esphomeyaml.helpers import App, add, Pvariable
+from esphomeyaml.helpers import App, add, Pvariable, esphomelib_ns
 
 CONFIG_SCHEMA = vol.Schema({
     cv.GenerateID('i2c'): cv.register_variable_id,
@@ -15,10 +15,12 @@ CONFIG_SCHEMA = vol.Schema({
     vol.Optional(CONF_SCAN): cv.boolean,
 })
 
+I2CComponent = esphomelib_ns.I2CComponent
+
 
 def to_code(config):
     rhs = App.init_i2c(config[CONF_SDA], config[CONF_SCL], config.get(CONF_SCAN))
-    i2c = Pvariable('I2CComponent', config[CONF_ID], rhs)
+    i2c = Pvariable(I2CComponent, config[CONF_ID], rhs)
     if CONF_FREQUENCY in config:
         add(i2c.set_frequency(config[CONF_FREQUENCY]))
     if CONF_RECEIVE_TIMEOUT in config:
diff --git a/esphomeyaml/components/ir_transmitter.py b/esphomeyaml/components/ir_transmitter.py
index c402aedeb..7ac2af7bc 100644
--- a/esphomeyaml/components/ir_transmitter.py
+++ b/esphomeyaml/components/ir_transmitter.py
@@ -2,11 +2,10 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml import pins
+from esphomeyaml.components import switch
 from esphomeyaml.const import CONF_CARRIER_DUTY_PERCENT, CONF_ID, CONF_PIN
 from esphomeyaml.helpers import App, Pvariable, gpio_output_pin_expression
 
-IR_TRANSMITTER_COMPONENT_CLASS = 'switch_::IRTransmitterComponent'
-
 CONFIG_SCHEMA = vol.All(cv.ensure_list, [vol.Schema({
     cv.GenerateID('ir_transmitter'): cv.register_variable_id,
     vol.Required(CONF_PIN): pins.GPIO_OUTPUT_PIN_SCHEMA,
@@ -14,12 +13,14 @@ CONFIG_SCHEMA = vol.All(cv.ensure_list, [vol.Schema({
                                                      vol.Range(min=1, max=100)),
 })])
 
+IRTransmitterComponent = switch.switch_ns.namespace('IRTransmitterComponent')
+
 
 def to_code(config):
     for conf in config:
         pin = gpio_output_pin_expression(conf[CONF_PIN])
         rhs = App.make_ir_transmitter(pin, conf.get(CONF_CARRIER_DUTY_PERCENT))
-        Pvariable(IR_TRANSMITTER_COMPONENT_CLASS, conf[CONF_ID], rhs)
+        Pvariable(IRTransmitterComponent, conf[CONF_ID], rhs)
 
 
 BUILD_FLAGS = '-DUSE_IR_TRANSMITTER'
diff --git a/esphomeyaml/components/light/__init__.py b/esphomeyaml/components/light/__init__.py
index 63ef94b22..e6669c7e7 100644
--- a/esphomeyaml/components/light/__init__.py
+++ b/esphomeyaml/components/light/__init__.py
@@ -1,17 +1,40 @@
 import esphomeyaml.config_validation as cv
-from esphomeyaml.const import CONF_DEFAULT_TRANSITION_LENGTH, CONF_GAMMA_CORRECT
-from esphomeyaml.helpers import add
+from esphomeyaml.const import CONF_DEFAULT_TRANSITION_LENGTH, CONF_GAMMA_CORRECT, CONF_ID, \
+    CONF_MQTT_ID
+from esphomeyaml.helpers import Application, Pvariable, add, esphomelib_ns, setup_mqtt_component
 
 PLATFORM_SCHEMA = cv.PLATFORM_SCHEMA.extend({
 
-}).extend(cv.MQTT_COMMAND_COMPONENT_SCHEMA.schema)
+})
+
+LIGHT_SCHEMA = cv.MQTT_COMMAND_COMPONENT_SCHEMA.extend({
+    cv.GenerateID('light'): cv.register_variable_id,
+    cv.GenerateID('mqtt_light', CONF_MQTT_ID): cv.register_variable_id,
+})
+
+light_ns = esphomelib_ns.namespace('light')
+LightState = light_ns.LightState
+MQTTJSONLightComponent = light_ns.MQTTJSONLightComponent
+ToggleAction = light_ns.ToggleAction
+TurnOffAction = light_ns.TurnOffAction
+TurnOnAction = light_ns.TurnOnAction
+MakeLight = Application.MakeLight
 
 
-def setup_light_component(obj, config):
+def setup_light_core_(light_var, mqtt_var, config):
     if CONF_DEFAULT_TRANSITION_LENGTH in config:
-        add(obj.set_default_transition_length(config[CONF_DEFAULT_TRANSITION_LENGTH]))
+        add(light_var.set_default_transition_length(config[CONF_DEFAULT_TRANSITION_LENGTH]))
     if CONF_GAMMA_CORRECT in config:
-        add(obj.set_gamma_correct(config[CONF_GAMMA_CORRECT]))
+        add(light_var.set_gamma_correct(config[CONF_GAMMA_CORRECT]))
+
+    setup_mqtt_component(mqtt_var, config)
+
+
+def setup_light(light_obj, mqtt_obj, config):
+    light_var = Pvariable(LightState, config[CONF_ID], light_obj, has_side_effects=False)
+    mqtt_var = Pvariable(MQTTJSONLightComponent, config[CONF_MQTT_ID], mqtt_obj,
+                         has_side_effects=False)
+    setup_light_core_(light_var, mqtt_var, config)
 
 
 BUILD_FLAGS = '-DUSE_LIGHT'
diff --git a/esphomeyaml/components/light/binary.py b/esphomeyaml/components/light/binary.py
index 4cc808a74..a469f5e93 100644
--- a/esphomeyaml/components/light/binary.py
+++ b/esphomeyaml/components/light/binary.py
@@ -1,20 +1,18 @@
-
 import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import light
-from esphomeyaml.const import CONF_ID, CONF_NAME, CONF_OUTPUT
-from esphomeyaml.helpers import App, get_variable, variable, setup_mqtt_component
+from esphomeyaml.const import CONF_MAKE_ID, CONF_NAME, CONF_OUTPUT
+from esphomeyaml.helpers import App, get_variable, variable
 
 PLATFORM_SCHEMA = light.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('binary_light'): cv.register_variable_id,
+    cv.GenerateID('binary_light', CONF_MAKE_ID): cv.register_variable_id,
     vol.Required(CONF_OUTPUT): cv.variable_id,
-})
+}).extend(light.LIGHT_SCHEMA.schema)
 
 
 def to_code(config):
     output = get_variable(config[CONF_OUTPUT])
     rhs = App.make_binary_light(config[CONF_NAME], output)
-    light_struct = variable('Application::MakeLight', config[CONF_ID], rhs)
-    setup_mqtt_component(light_struct.Pmqtt, config)
-    light.setup_light_component(light_struct.Pstate, config)
+    light_struct = variable(light.MakeLight, config[CONF_MAKE_ID], rhs)
+    light.setup_light(light_struct.Pstate, light_struct.Pmqtt, config)
diff --git a/esphomeyaml/components/light/fastled_clockless.py b/esphomeyaml/components/light/fastled_clockless.py
index 85b1d95c9..afaabffa0 100644
--- a/esphomeyaml/components/light/fastled_clockless.py
+++ b/esphomeyaml/components/light/fastled_clockless.py
@@ -4,10 +4,10 @@ import esphomeyaml.config_validation as cv
 from esphomeyaml import pins
 from esphomeyaml.components import light
 from esphomeyaml.const import CONF_CHIPSET, CONF_DEFAULT_TRANSITION_LENGTH, CONF_GAMMA_CORRECT, \
-    CONF_ID, CONF_MAX_REFRESH_RATE, CONF_NAME, CONF_NUM_LEDS, CONF_PIN, CONF_POWER_SUPPLY, \
+    CONF_MAKE_ID, CONF_MAX_REFRESH_RATE, CONF_NAME, CONF_NUM_LEDS, CONF_PIN, CONF_POWER_SUPPLY, \
     CONF_RGB_ORDER
-from esphomeyaml.helpers import App, RawExpression, TemplateArguments, add, get_variable, \
-    setup_mqtt_component, variable
+from esphomeyaml.helpers import App, Application, RawExpression, TemplateArguments, add, \
+    get_variable, variable
 
 TYPES = [
     'NEOPIXEL',
@@ -53,24 +53,26 @@ def validate(value):
 
 
 PLATFORM_SCHEMA = vol.All(light.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('fast_led_clockless_light'): cv.register_variable_id,
+    cv.GenerateID('fast_led_clockless_light', CONF_MAKE_ID): cv.register_variable_id,
 
-    vol.Required(CONF_CHIPSET): vol.All(vol.Upper, vol.Any(*TYPES)),
+    vol.Required(CONF_CHIPSET): vol.All(vol.Upper, cv.one_of(*TYPES)),
     vol.Required(CONF_PIN): pins.output_pin,
 
     vol.Required(CONF_NUM_LEDS): cv.positive_not_null_int,
     vol.Optional(CONF_MAX_REFRESH_RATE): cv.positive_time_period_microseconds,
-    vol.Optional(CONF_RGB_ORDER): vol.All(vol.Upper, vol.Any(*RGB_ORDERS)),
+    vol.Optional(CONF_RGB_ORDER): vol.All(vol.Upper, cv.one_of(*RGB_ORDERS)),
 
     vol.Optional(CONF_GAMMA_CORRECT): cv.positive_float,
     vol.Optional(CONF_DEFAULT_TRANSITION_LENGTH): cv.positive_time_period_milliseconds,
     vol.Optional(CONF_POWER_SUPPLY): cv.variable_id,
-}), validate)
+}).extend(light.LIGHT_SCHEMA.schema), validate)
+
+MakeFastLEDLight = Application.MakeFastLEDLight
 
 
 def to_code(config):
     rhs = App.make_fast_led_light(config[CONF_NAME])
-    make = variable('Application::MakeFastLEDLight', config[CONF_ID], rhs)
+    make = variable(MakeFastLEDLight, config[CONF_MAKE_ID], rhs)
     fast_led = make.Pfast_led
 
     rgb_order = None
@@ -87,8 +89,7 @@ def to_code(config):
         power_supply = get_variable(config[CONF_POWER_SUPPLY])
         add(fast_led.set_power_supply(power_supply))
 
-    setup_mqtt_component(make.Pmqtt, config)
-    light.setup_light_component(make.Pstate, config)
+    light.setup_light(make.Pstate, make.Pmqtt, config)
 
 
 BUILD_FLAGS = '-DUSE_FAST_LED_LIGHT'
diff --git a/esphomeyaml/components/light/fastled_spi.py b/esphomeyaml/components/light/fastled_spi.py
index 62cb30dc0..54be4f7d4 100644
--- a/esphomeyaml/components/light/fastled_spi.py
+++ b/esphomeyaml/components/light/fastled_spi.py
@@ -4,10 +4,10 @@ import esphomeyaml.config_validation as cv
 from esphomeyaml import pins
 from esphomeyaml.components import light
 from esphomeyaml.const import CONF_CHIPSET, CONF_CLOCK_PIN, CONF_DATA_PIN, \
-    CONF_DEFAULT_TRANSITION_LENGTH, CONF_GAMMA_CORRECT, CONF_ID, CONF_MAX_REFRESH_RATE, CONF_NAME, \
-    CONF_NUM_LEDS, CONF_POWER_SUPPLY, CONF_RGB_ORDER
-from esphomeyaml.helpers import App, RawExpression, TemplateArguments, add, get_variable, \
-    setup_mqtt_component, variable
+    CONF_DEFAULT_TRANSITION_LENGTH, CONF_GAMMA_CORRECT, CONF_MAKE_ID, CONF_MAX_REFRESH_RATE, \
+    CONF_NAME, CONF_NUM_LEDS, CONF_POWER_SUPPLY, CONF_RGB_ORDER
+from esphomeyaml.helpers import App, Application, RawExpression, TemplateArguments, add, \
+    get_variable, variable
 
 CHIPSETS = [
     'LPD8806',
@@ -30,25 +30,27 @@ RGB_ORDERS = [
 ]
 
 PLATFORM_SCHEMA = light.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('fast_led_spi_light'): cv.register_variable_id,
+    cv.GenerateID('fast_led_spi_light', CONF_MAKE_ID): cv.register_variable_id,
 
-    vol.Required(CONF_CHIPSET): vol.All(vol.Upper, vol.Any(*CHIPSETS)),
+    vol.Required(CONF_CHIPSET): vol.All(vol.Upper, cv.one_of(*CHIPSETS)),
     vol.Required(CONF_DATA_PIN): pins.output_pin,
     vol.Required(CONF_CLOCK_PIN): pins.output_pin,
 
     vol.Required(CONF_NUM_LEDS): cv.positive_not_null_int,
-    vol.Optional(CONF_RGB_ORDER): vol.All(vol.Upper, vol.Any(*RGB_ORDERS)),
+    vol.Optional(CONF_RGB_ORDER): vol.All(vol.Upper, cv.one_of(*RGB_ORDERS)),
     vol.Optional(CONF_MAX_REFRESH_RATE): cv.positive_time_period_microseconds,
 
     vol.Optional(CONF_GAMMA_CORRECT): cv.positive_float,
     vol.Optional(CONF_DEFAULT_TRANSITION_LENGTH): cv.positive_time_period_milliseconds,
     vol.Optional(CONF_POWER_SUPPLY): cv.variable_id,
-})
+}).extend(light.LIGHT_SCHEMA.schema)
+
+MakeFastLEDLight = Application.MakeFastLEDLight
 
 
 def to_code(config):
     rhs = App.make_fast_led_light(config[CONF_NAME])
-    make = variable('Application::MakeFastLEDLight', config[CONF_ID], rhs)
+    make = variable(MakeFastLEDLight, config[CONF_MAKE_ID], rhs)
     fast_led = make.Pfast_led
 
     rgb_order = None
@@ -67,8 +69,7 @@ def to_code(config):
         power_supply = get_variable(config[CONF_POWER_SUPPLY])
         add(fast_led.set_power_supply(power_supply))
 
-    setup_mqtt_component(make.Pmqtt, config)
-    light.setup_light_component(make.Pstate, config)
+        light.setup_light(make.Pstate, make.Pmqtt, config)
 
 
 BUILD_FLAGS = '-DUSE_FAST_LED_LIGHT'
diff --git a/esphomeyaml/components/light/monochromatic.py b/esphomeyaml/components/light/monochromatic.py
index 901dd6ce7..af5422d3f 100644
--- a/esphomeyaml/components/light/monochromatic.py
+++ b/esphomeyaml/components/light/monochromatic.py
@@ -2,21 +2,20 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import light
-from esphomeyaml.const import CONF_DEFAULT_TRANSITION_LENGTH, CONF_GAMMA_CORRECT, CONF_ID, \
+from esphomeyaml.const import CONF_DEFAULT_TRANSITION_LENGTH, CONF_GAMMA_CORRECT, CONF_MAKE_ID, \
     CONF_NAME, CONF_OUTPUT
-from esphomeyaml.helpers import App, get_variable, setup_mqtt_component, variable
+from esphomeyaml.helpers import App, get_variable, variable
 
 PLATFORM_SCHEMA = light.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('monochromatic_light'): cv.register_variable_id,
+    cv.GenerateID('monochromatic_light', CONF_MAKE_ID): cv.register_variable_id,
     vol.Required(CONF_OUTPUT): cv.variable_id,
     vol.Optional(CONF_GAMMA_CORRECT): cv.positive_float,
     vol.Optional(CONF_DEFAULT_TRANSITION_LENGTH): cv.positive_time_period_milliseconds,
-})
+}).extend(light.LIGHT_SCHEMA.schema)
 
 
 def to_code(config):
     output = get_variable(config[CONF_OUTPUT])
     rhs = App.make_monochromatic_light(config[CONF_NAME], output)
-    light_struct = variable('Application::MakeLight', config[CONF_ID], rhs)
-    setup_mqtt_component(light_struct.Pmqtt, config)
-    light.setup_light_component(light_struct.Pstate, config)
+    light_struct = variable(light.MakeLight, config[CONF_MAKE_ID], rhs)
+    light.setup_light(light_struct.Pstate, light_struct.Pmqtt, config)
diff --git a/esphomeyaml/components/light/rgb.py b/esphomeyaml/components/light/rgb.py
index 5ae306cb9..83b6f8dab 100644
--- a/esphomeyaml/components/light/rgb.py
+++ b/esphomeyaml/components/light/rgb.py
@@ -3,17 +3,17 @@ import voluptuous as vol
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import light
 from esphomeyaml.const import CONF_BLUE, CONF_DEFAULT_TRANSITION_LENGTH, CONF_GAMMA_CORRECT, \
-    CONF_GREEN, CONF_ID, CONF_NAME, CONF_RED
-from esphomeyaml.helpers import App, get_variable, setup_mqtt_component, variable
+    CONF_GREEN, CONF_MAKE_ID, CONF_NAME, CONF_RED
+from esphomeyaml.helpers import App, get_variable, variable
 
 PLATFORM_SCHEMA = light.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('rgb_light'): cv.register_variable_id,
+    cv.GenerateID('rgb_light', CONF_MAKE_ID): cv.register_variable_id,
     vol.Required(CONF_RED): cv.variable_id,
     vol.Required(CONF_GREEN): cv.variable_id,
     vol.Required(CONF_BLUE): cv.variable_id,
     vol.Optional(CONF_GAMMA_CORRECT): cv.positive_float,
     vol.Optional(CONF_DEFAULT_TRANSITION_LENGTH): cv.positive_time_period_milliseconds,
-})
+}).extend(light.LIGHT_SCHEMA.schema)
 
 
 def to_code(config):
@@ -21,6 +21,5 @@ def to_code(config):
     green = get_variable(config[CONF_GREEN])
     blue = get_variable(config[CONF_BLUE])
     rhs = App.make_rgb_light(config[CONF_NAME], red, green, blue)
-    light_struct = variable('Application::MakeLight', config[CONF_ID], rhs)
-    setup_mqtt_component(light_struct.Pmqtt, config)
-    light.setup_light_component(light_struct.Pstate, config)
+    light_struct = variable(light.MakeLight, config[CONF_MAKE_ID], rhs)
+    light.setup_light(light_struct.Pstate, light_struct.Pmqtt, config)
diff --git a/esphomeyaml/components/light/rgbw.py b/esphomeyaml/components/light/rgbw.py
index 05008cf05..cdbfc8828 100644
--- a/esphomeyaml/components/light/rgbw.py
+++ b/esphomeyaml/components/light/rgbw.py
@@ -3,18 +3,18 @@ import voluptuous as vol
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import light
 from esphomeyaml.const import CONF_BLUE, CONF_DEFAULT_TRANSITION_LENGTH, CONF_GAMMA_CORRECT, \
-    CONF_GREEN, CONF_ID, CONF_NAME, CONF_RED, CONF_WHITE
-from esphomeyaml.helpers import App, get_variable, setup_mqtt_component, variable
+    CONF_GREEN, CONF_MAKE_ID, CONF_NAME, CONF_RED, CONF_WHITE
+from esphomeyaml.helpers import App, get_variable, variable
 
 PLATFORM_SCHEMA = light.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('rgbw_light'): cv.register_variable_id,
+    cv.GenerateID('rgbw_light', CONF_MAKE_ID): cv.register_variable_id,
     vol.Required(CONF_RED): cv.variable_id,
     vol.Required(CONF_GREEN): cv.variable_id,
     vol.Required(CONF_BLUE): cv.variable_id,
     vol.Required(CONF_WHITE): cv.variable_id,
     vol.Optional(CONF_GAMMA_CORRECT): cv.positive_float,
     vol.Optional(CONF_DEFAULT_TRANSITION_LENGTH): cv.positive_time_period_milliseconds,
-})
+}).extend(light.LIGHT_SCHEMA.schema)
 
 
 def to_code(config):
@@ -23,6 +23,5 @@ def to_code(config):
     blue = get_variable(config[CONF_BLUE])
     white = get_variable(config[CONF_WHITE])
     rhs = App.make_rgbw_light(config[CONF_NAME], red, green, blue, white)
-    light_struct = variable('Application::MakeLight', config[CONF_ID], rhs)
-    setup_mqtt_component(light_struct.Pmqtt, config)
-    light.setup_light_component(light_struct.Pstate, config)
+    light_struct = variable(light.MakeLight, config[CONF_MAKE_ID], rhs)
+    light.setup_light(light_struct.Pstate, light_struct.Pmqtt, config)
diff --git a/esphomeyaml/components/logger.py b/esphomeyaml/components/logger.py
index 6c7be146c..a48956042 100644
--- a/esphomeyaml/components/logger.py
+++ b/esphomeyaml/components/logger.py
@@ -4,14 +4,34 @@ import esphomeyaml.config_validation as cv
 from esphomeyaml.const import CONF_BAUD_RATE, CONF_ID, CONF_LEVEL, CONF_LOGGER, CONF_LOGS, \
     CONF_TX_BUFFER_SIZE
 from esphomeyaml.core import ESPHomeYAMLError
-from esphomeyaml.helpers import App, Pvariable, RawExpression, add
+from esphomeyaml.helpers import App, Pvariable, add, esphomelib_ns, global_ns
 
-LOG_LEVELS = ['NONE', 'ERROR', 'WARN', 'INFO', 'DEBUG', 'VERBOSE', 'VERY_VERBOSE']
+LOG_LEVELS = {
+    'NONE': global_ns.ESPHOMELIB_LOG_LEVEL_NONE,
+    'ERROR': global_ns.ESPHOMELIB_LOG_LEVEL_ERROR,
+    'WARN': global_ns.ESPHOMELIB_LOG_LEVEL_WARN,
+    'INFO': global_ns.ESPHOMELIB_LOG_LEVEL_INFO,
+    'DEBUG': global_ns.ESPHOMELIB_LOG_LEVEL_DEBUG,
+    'VERBOSE': global_ns.ESPHOMELIB_LOG_LEVEL_VERBOSE,
+    'VERY_VERBOSE': global_ns.ESPHOMELIB_LOG_LEVEL_VERY_VERBOSE,
+}
+
+LOG_LEVEL_SEVERITY = ['NONE', 'ERROR', 'WARN', 'INFO', 'DEBUG', 'VERBOSE', 'VERY_VERBOSE']
 
 # pylint: disable=invalid-name
-is_log_level = vol.All(vol.Upper, vol.Any(*LOG_LEVELS))
+is_log_level = vol.All(vol.Upper, cv.one_of(*LOG_LEVELS))
 
-CONFIG_SCHEMA = vol.Schema({
+
+def validate_local_no_higher_than_global(value):
+    global_level = value.get(CONF_LEVEL, 'DEBUG')
+    for tag, level in value.get(CONF_LOGS, {}).iteritems():
+        if LOG_LEVEL_SEVERITY.index(level) > LOG_LEVEL_SEVERITY.index(global_level):
+            raise ESPHomeYAMLError(u"The local log level {} for {} must be less severe than the "
+                                   u"global log level {}.".format(level, tag, global_level))
+    return value
+
+
+CONFIG_SCHEMA = vol.All(vol.Schema({
     cv.GenerateID(CONF_LOGGER): cv.register_variable_id,
     vol.Optional(CONF_BAUD_RATE): cv.positive_int,
     vol.Optional(CONF_TX_BUFFER_SIZE): cv.positive_int,
@@ -19,33 +39,23 @@ CONFIG_SCHEMA = vol.Schema({
     vol.Optional(CONF_LOGS): vol.Schema({
         cv.string: is_log_level,
     })
-})
+}), validate_local_no_higher_than_global)
 
-
-def esphomelib_log_level(level):
-    return u'ESPHOMELIB_LOG_LEVEL_{}'.format(level)
-
-
-def exp_log_level(level):
-    return RawExpression(esphomelib_log_level(level))
+LogComponent = esphomelib_ns.LogComponent
 
 
 def to_code(config):
     rhs = App.init_log(config.get(CONF_BAUD_RATE))
-    log = Pvariable(u'LogComponent', config[CONF_ID], rhs)
+    log = Pvariable(LogComponent, config[CONF_ID], rhs)
     if CONF_TX_BUFFER_SIZE in config:
         add(log.set_tx_buffer_size(config[CONF_TX_BUFFER_SIZE]))
     if CONF_LEVEL in config:
-        add(log.set_global_log_level(exp_log_level(config[CONF_LEVEL])))
+        add(log.set_global_log_level(LOG_LEVELS[config[CONF_LEVEL]]))
     for tag, level in config.get(CONF_LOGS, {}).iteritems():
-        global_level = config.get(CONF_LEVEL, 'DEBUG')
-        if LOG_LEVELS.index(level) > LOG_LEVELS.index(global_level):
-            raise ESPHomeYAMLError(u"The local log level {} for {} must be less severe than the "
-                                   u"global log level {}.".format(level, tag, global_level))
-        add(log.set_log_level(tag, exp_log_level(level)))
+        add(log.set_log_level(tag, LOG_LEVELS[level]))
 
 
 def required_build_flags(config):
     if CONF_LEVEL in config:
-        return u'-DESPHOMELIB_LOG_LEVEL={}'.format(esphomelib_log_level(config[CONF_LEVEL]))
+        return u'-DESPHOMELIB_LOG_LEVEL={}'.format(str(LOG_LEVELS[config[CONF_LEVEL]]))
     return None
diff --git a/esphomeyaml/components/mqtt.py b/esphomeyaml/components/mqtt.py
index 64b1b0b57..8ae4725a3 100644
--- a/esphomeyaml/components/mqtt.py
+++ b/esphomeyaml/components/mqtt.py
@@ -3,12 +3,14 @@ import re
 import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
+from esphomeyaml import automation
 from esphomeyaml.const import CONF_BIRTH_MESSAGE, CONF_BROKER, CONF_CLIENT_ID, CONF_DISCOVERY, \
-    CONF_DISCOVERY_PREFIX, CONF_DISCOVERY_RETAIN, CONF_SSL_FINGERPRINTS, CONF_ID, CONF_LOG_TOPIC, \
-    CONF_MQTT, CONF_PASSWORD, CONF_PAYLOAD, CONF_PORT, CONF_QOS, CONF_RETAIN, CONF_TOPIC, \
-    CONF_TOPIC_PREFIX, CONF_USERNAME, CONF_WILL_MESSAGE, CONF_KEEPALIVE
-from esphomeyaml.helpers import App, ArrayInitializer, Pvariable, StructInitializer, add, \
-    exp_empty_optional, RawExpression
+    CONF_DISCOVERY_PREFIX, CONF_DISCOVERY_RETAIN, CONF_ID, CONF_KEEPALIVE, CONF_LOG_TOPIC, \
+    CONF_MQTT, CONF_ON_MESSAGE, CONF_PASSWORD, CONF_PAYLOAD, CONF_PORT, CONF_QOS, CONF_RETAIN, \
+    CONF_SSL_FINGERPRINTS, CONF_TOPIC, CONF_TOPIC_PREFIX, CONF_TRIGGER_ID, CONF_USERNAME, \
+    CONF_WILL_MESSAGE
+from esphomeyaml.helpers import App, ArrayInitializer, Pvariable, StructInitializer, \
+    TemplateArguments, add, esphomelib_ns, optional, std_string, RawExpression
 
 
 def validate_message_just_topic(value):
@@ -18,7 +20,7 @@ def validate_message_just_topic(value):
 
 MQTT_MESSAGE_BASE = vol.Schema({
     vol.Required(CONF_TOPIC): cv.publish_topic,
-    vol.Optional(CONF_QOS, default=0): vol.All(vol.Coerce(int), vol.In([0, 1, 2])),
+    vol.Optional(CONF_QOS, default=0): cv.mqtt_qos,
     vol.Optional(CONF_RETAIN, default=True): cv.boolean,
 })
 
@@ -28,12 +30,15 @@ MQTT_MESSAGE_SCHEMA = vol.Any(None, MQTT_MESSAGE_BASE.extend({
     vol.Required(CONF_PAYLOAD): cv.mqtt_payload,
 }))
 
+mqtt_ns = esphomelib_ns.namespace('mqtt')
+MQTTMessage = mqtt_ns.MQTTMessage
+MQTTClientComponent = mqtt_ns.MQTTClientComponent
+MQTTPublishAction = mqtt_ns.MQTTPublishAction
+MQTTMessageTrigger = mqtt_ns.MQTTMessageTrigger
+
 
 def validate_broker(value):
     value = cv.string_strict(value)
-    if value.endswith(u'.local'):
-        raise vol.Invalid(u"MQTT server addresses ending with '.local' are currently unsupported."
-                          u" Please use the static IP instead.")
     if u':' in value:
         raise vol.Invalid(u"Please specify the port using the port: option")
     if not value:
@@ -65,14 +70,18 @@ CONFIG_SCHEMA = vol.Schema({
     vol.Optional(CONF_SSL_FINGERPRINTS): vol.All(cv.only_on_esp8266,
                                                  cv.ensure_list, [validate_fingerprint]),
     vol.Optional(CONF_KEEPALIVE): cv.positive_time_period_seconds,
+    vol.Optional(CONF_ON_MESSAGE): vol.All(cv.ensure_list, [automation.AUTOMATION_SCHEMA.extend({
+        vol.Required(CONF_TOPIC): cv.publish_topic,
+        vol.Optional(CONF_QOS, 0): cv.mqtt_qos,
+    })])
 })
 
 
 def exp_mqtt_message(config):
     if config is None:
-        return exp_empty_optional('mqtt::MQTTMessage')
+        return optional(TemplateArguments(MQTTMessage))
     exp = StructInitializer(
-        'mqtt::MQTTMessage',
+        MQTTMessage,
         ('topic', config[CONF_TOPIC]),
         ('payload', config.get(CONF_PAYLOAD, "")),
         ('qos', config[CONF_QOS]),
@@ -84,7 +93,7 @@ def exp_mqtt_message(config):
 def to_code(config):
     rhs = App.init_mqtt(config[CONF_BROKER], config[CONF_PORT],
                         config[CONF_USERNAME], config[CONF_PASSWORD])
-    mqtt = Pvariable('mqtt::MQTTClientComponent', config[CONF_ID], rhs)
+    mqtt = Pvariable(MQTTClientComponent, config[CONF_ID], rhs)
     if not config.get(CONF_DISCOVERY, True):
         add(mqtt.disable_discovery())
     if CONF_DISCOVERY_RETAIN in config or CONF_DISCOVERY_PREFIX in config:
@@ -120,6 +129,11 @@ def to_code(config):
     if CONF_KEEPALIVE in config:
         add(mqtt.set_keep_alive(config[CONF_KEEPALIVE]))
 
+    for conf in config.get(CONF_ON_MESSAGE, []):
+        rhs = mqtt.make_message_trigger(conf[CONF_TOPIC], conf[CONF_QOS])
+        trigger = Pvariable(MQTTMessageTrigger, conf[CONF_TRIGGER_ID], rhs)
+        automation.build_automation(trigger, std_string, conf)
+
 
 def required_build_flags(config):
     if CONF_SSL_FINGERPRINTS in config:
diff --git a/esphomeyaml/components/ota.py b/esphomeyaml/components/ota.py
index 33deff16a..7398202ec 100644
--- a/esphomeyaml/components/ota.py
+++ b/esphomeyaml/components/ota.py
@@ -8,7 +8,7 @@ from esphomeyaml import core
 from esphomeyaml.const import CONF_ID, CONF_OTA, CONF_PASSWORD, CONF_PORT, CONF_SAFE_MODE, \
     ESP_PLATFORM_ESP32, ESP_PLATFORM_ESP8266
 from esphomeyaml.core import ESPHomeYAMLError
-from esphomeyaml.helpers import App, Pvariable, add
+from esphomeyaml.helpers import App, Pvariable, add, esphomelib_ns
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -20,10 +20,12 @@ CONFIG_SCHEMA = vol.Schema({
     vol.Optional(CONF_PASSWORD): cv.string,
 })
 
+OTAComponent = esphomelib_ns.OTAComponent
+
 
 def to_code(config):
     rhs = App.init_ota()
-    ota = Pvariable('OTAComponent', config[CONF_ID], rhs)
+    ota = Pvariable(OTAComponent, config[CONF_ID], rhs)
     if CONF_PASSWORD in config:
         hash_ = hashlib.md5(config[CONF_PASSWORD].encode()).hexdigest()
         add(ota.set_auth_password_hash(hash_))
diff --git a/esphomeyaml/components/output/__init__.py b/esphomeyaml/components/output/__init__.py
index c4f29fd6b..1c3940f8c 100644
--- a/esphomeyaml/components/output/__init__.py
+++ b/esphomeyaml/components/output/__init__.py
@@ -1,19 +1,24 @@
-
 import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
-from esphomeyaml.const import CONF_POWER_SUPPLY, CONF_INVERTED, CONF_MAX_POWER
-from esphomeyaml.helpers import get_variable, add
+from esphomeyaml.const import CONF_INVERTED, CONF_MAX_POWER, CONF_POWER_SUPPLY
+from esphomeyaml.helpers import add, esphomelib_ns, get_variable
 
 PLATFORM_SCHEMA = cv.PLATFORM_SCHEMA.extend({
+
+})
+
+BINARY_OUTPUT_SCHEMA = cv.REQUIRED_ID_SCHEMA.extend({
     vol.Optional(CONF_POWER_SUPPLY): cv.variable_id,
     vol.Optional(CONF_INVERTED): cv.boolean,
-}).extend(cv.REQUIRED_ID_SCHEMA.schema)
+})
 
-FLOAT_PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
+FLOAT_OUTPUT_SCHEMA = BINARY_OUTPUT_SCHEMA.extend({
     vol.Optional(CONF_MAX_POWER): cv.zero_to_one_float,
 })
 
+output_ns = esphomelib_ns.namespace('output')
+
 
 def setup_output_platform(obj, config, skip_power_supply=False):
     if CONF_INVERTED in config:
diff --git a/esphomeyaml/components/output/esp8266_pwm.py b/esphomeyaml/components/output/esp8266_pwm.py
index 8bc507df2..c457062e6 100644
--- a/esphomeyaml/components/output/esp8266_pwm.py
+++ b/esphomeyaml/components/output/esp8266_pwm.py
@@ -15,15 +15,17 @@ def valid_pwm_pin(value):
     return value
 
 
-PLATFORM_SCHEMA = output.FLOAT_PLATFORM_SCHEMA.extend({
+PLATFORM_SCHEMA = output.PLATFORM_SCHEMA.extend({
     vol.Required(CONF_PIN): vol.All(pins.GPIO_INTERNAL_OUTPUT_PIN_SCHEMA, valid_pwm_pin),
-})
+}).extend(output.FLOAT_OUTPUT_SCHEMA.schema)
+
+ESP8266PWMOutput = output.output_ns.ESP8266PWMOutput
 
 
 def to_code(config):
     pin = gpio_output_pin_expression(config[CONF_PIN])
     rhs = App.make_esp8266_pwm_output(pin)
-    gpio = Pvariable('output::ESP8266PWMOutput', config[CONF_ID], rhs)
+    gpio = Pvariable(ESP8266PWMOutput, config[CONF_ID], rhs)
     output.setup_output_platform(gpio, config)
 
 
diff --git a/esphomeyaml/components/output/gpio.py b/esphomeyaml/components/output/gpio.py
index c6c67a396..c82a551d2 100644
--- a/esphomeyaml/components/output/gpio.py
+++ b/esphomeyaml/components/output/gpio.py
@@ -7,13 +7,15 @@ from esphomeyaml.helpers import App, Pvariable, gpio_output_pin_expression
 
 PLATFORM_SCHEMA = output.PLATFORM_SCHEMA.extend({
     vol.Required(CONF_PIN): pins.GPIO_OUTPUT_PIN_SCHEMA,
-})
+}).extend(output.BINARY_OUTPUT_SCHEMA.schema)
+
+GPIOBinaryOutputComponent = output.output_ns.GPIOBinaryOutputComponent
 
 
 def to_code(config):
     pin = gpio_output_pin_expression(config[CONF_PIN])
     rhs = App.make_gpio_output(pin)
-    gpio = Pvariable('output::GPIOBinaryOutputComponent', config[CONF_ID], rhs)
+    gpio = Pvariable(GPIOBinaryOutputComponent, config[CONF_ID], rhs)
     output.setup_output_platform(gpio, config)
 
 
diff --git a/esphomeyaml/components/output/ledc.py b/esphomeyaml/components/output/ledc.py
index f6c8dd5c0..fbcb73799 100644
--- a/esphomeyaml/components/output/ledc.py
+++ b/esphomeyaml/components/output/ledc.py
@@ -19,12 +19,15 @@ def validate_frequency_bit_depth(obj):
     return obj
 
 
-PLATFORM_SCHEMA = vol.All(output.FLOAT_PLATFORM_SCHEMA.extend({
+PLATFORM_SCHEMA = vol.All(output.PLATFORM_SCHEMA.extend({
     vol.Required(CONF_PIN): vol.All(pins.output_pin, vol.Range(min=0, max=33)),
     vol.Optional(CONF_FREQUENCY): cv.frequency,
     vol.Optional(CONF_BIT_DEPTH): vol.All(vol.Coerce(int), vol.Range(min=1, max=15)),
     vol.Optional(CONF_CHANNEL): vol.All(vol.Coerce(int), vol.Range(min=0, max=15))
-}), validate_frequency_bit_depth)
+}).extend(output.FLOAT_OUTPUT_SCHEMA.schema), validate_frequency_bit_depth)
+
+
+LEDCOutputComponent = output.output_ns.LEDCOutputComponent
 
 
 def to_code(config):
@@ -32,7 +35,7 @@ def to_code(config):
     if frequency is None and CONF_BIT_DEPTH in config:
         frequency = 1000
     rhs = App.make_ledc_output(config[CONF_PIN], frequency, config.get(CONF_BIT_DEPTH))
-    ledc = Pvariable('output::LEDCOutputComponent', config[CONF_ID], rhs)
+    ledc = Pvariable(LEDCOutputComponent, config[CONF_ID], rhs)
     if CONF_CHANNEL in config:
         add(ledc.set_channel(config[CONF_CHANNEL]))
     output.setup_output_platform(ledc, config)
diff --git a/esphomeyaml/components/output/pca9685.py b/esphomeyaml/components/output/pca9685.py
index ffa845328..1d617efa7 100644
--- a/esphomeyaml/components/output/pca9685.py
+++ b/esphomeyaml/components/output/pca9685.py
@@ -2,26 +2,28 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import output
-from esphomeyaml.components.pca9685 import PCA9685_COMPONENT_TYPE
+from esphomeyaml.components.pca9685 import PCA9685OutputComponent
 from esphomeyaml.const import CONF_CHANNEL, CONF_ID, CONF_PCA9685_ID, CONF_POWER_SUPPLY
 from esphomeyaml.helpers import Pvariable, get_variable
 
 DEPENDENCIES = ['pca9685']
 
-PLATFORM_SCHEMA = output.FLOAT_PLATFORM_SCHEMA.extend({
+PLATFORM_SCHEMA = output.PLATFORM_SCHEMA.extend({
     vol.Required(CONF_CHANNEL): vol.All(vol.Coerce(int),
                                         vol.Range(min=0, max=15)),
     vol.Optional(CONF_PCA9685_ID): cv.variable_id,
-})
+}).extend(output.FLOAT_OUTPUT_SCHEMA.schema)
+
+Channel = PCA9685OutputComponent.Channel
 
 
 def to_code(config):
     power_supply = None
     if CONF_POWER_SUPPLY in config:
         power_supply = get_variable(config[CONF_POWER_SUPPLY])
-    pca9685 = get_variable(config.get(CONF_PCA9685_ID), PCA9685_COMPONENT_TYPE)
+    pca9685 = get_variable(config.get(CONF_PCA9685_ID), PCA9685OutputComponent)
     rhs = pca9685.create_channel(config[CONF_CHANNEL], power_supply)
-    out = Pvariable('output::PCA9685OutputComponent::Channel', config[CONF_ID], rhs)
+    out = Pvariable(Channel, config[CONF_ID], rhs)
     output.setup_output_platform(out, config, skip_power_supply=True)
 
 
diff --git a/esphomeyaml/components/pca9685.py b/esphomeyaml/components/pca9685.py
index 3d1031e71..d1a9c59c3 100644
--- a/esphomeyaml/components/pca9685.py
+++ b/esphomeyaml/components/pca9685.py
@@ -1,14 +1,13 @@
 import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
+from esphomeyaml.components import output
 from esphomeyaml.const import CONF_ADDRESS, CONF_FREQUENCY, CONF_ID, CONF_PHASE_BALANCER
-from esphomeyaml.helpers import App, HexIntLiteral, Pvariable, RawExpression, add
+from esphomeyaml.helpers import App, HexIntLiteral, Pvariable, add
 
 DEPENDENCIES = ['i2c']
 
-PHASE_BALANCERS = ['None', 'Linear', 'Weaved']
-
-PCA9685_COMPONENT_TYPE = 'output::PCA9685OutputComponent'
+PCA9685OutputComponent = output.output_ns.namespace('PCA9685OutputComponent')
 
 PHASE_BALANCER_MESSAGE = ("The phase_balancer option has been removed in version 1.5.0. "
                           "esphomelib will now automatically choose a suitable phase balancer.")
@@ -28,13 +27,9 @@ CONFIG_SCHEMA = vol.All(cv.ensure_list, [PCA9685_SCHEMA])
 def to_code(config):
     for conf in config:
         rhs = App.make_pca9685_component(conf.get(CONF_FREQUENCY))
-        pca9685 = Pvariable(PCA9685_COMPONENT_TYPE, conf[CONF_ID], rhs)
+        pca9685 = Pvariable(PCA9685OutputComponent, conf[CONF_ID], rhs)
         if CONF_ADDRESS in conf:
             add(pca9685.set_address(HexIntLiteral(conf[CONF_ADDRESS])))
-        if CONF_PHASE_BALANCER in conf:
-            phase_balancer = RawExpression(u'PCA9685_PhaseBalancer_{}'.format(
-                conf[CONF_PHASE_BALANCER]))
-            add(pca9685.set_phase_balancer(phase_balancer))
 
 
 BUILD_FLAGS = '-DUSE_PCA9685_OUTPUT'
diff --git a/esphomeyaml/components/pcf8574.py b/esphomeyaml/components/pcf8574.py
index 82be87129..8f10226fa 100644
--- a/esphomeyaml/components/pcf8574.py
+++ b/esphomeyaml/components/pcf8574.py
@@ -2,7 +2,7 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.const import CONF_ADDRESS, CONF_ID, CONF_PCF8575
-from esphomeyaml.helpers import App, Pvariable
+from esphomeyaml.helpers import App, Pvariable, esphomelib_ns
 
 DEPENDENCIES = ['i2c']
 
@@ -14,11 +14,14 @@ PCF8574_SCHEMA = vol.Schema({
 
 CONFIG_SCHEMA = vol.All(cv.ensure_list, [PCF8574_SCHEMA])
 
+io_ns = esphomelib_ns.namespace('io')
+PCF8574Component = io_ns.PCF8574Component
+
 
 def to_code(config):
     for conf in config:
         rhs = App.make_pcf8574_component(conf[CONF_ADDRESS], conf[CONF_PCF8575])
-        Pvariable('io::PCF8574Component', conf[CONF_ID], rhs)
+        Pvariable(PCF8574Component, conf[CONF_ID], rhs)
 
 
 BUILD_FLAGS = '-DUSE_PCF8574'
diff --git a/esphomeyaml/components/power_supply.py b/esphomeyaml/components/power_supply.py
index d70383454..e6aee6eda 100644
--- a/esphomeyaml/components/power_supply.py
+++ b/esphomeyaml/components/power_supply.py
@@ -3,7 +3,7 @@ import voluptuous as vol
 import esphomeyaml.config_validation as cv
 from esphomeyaml import pins
 from esphomeyaml.const import CONF_ENABLE_TIME, CONF_ID, CONF_KEEP_ON_TIME, CONF_PIN
-from esphomeyaml.helpers import App, Pvariable, add, gpio_output_pin_expression
+from esphomeyaml.helpers import App, Pvariable, add, esphomelib_ns, gpio_output_pin_expression
 
 POWER_SUPPLY_SCHEMA = cv.REQUIRED_ID_SCHEMA.extend({
     vol.Required(CONF_PIN): pins.GPIO_OUTPUT_PIN_SCHEMA,
@@ -13,12 +13,13 @@ POWER_SUPPLY_SCHEMA = cv.REQUIRED_ID_SCHEMA.extend({
 
 CONFIG_SCHEMA = vol.All(cv.ensure_list, [POWER_SUPPLY_SCHEMA])
 
+PowerSupplyComponent = esphomelib_ns.PowerSupplyComponent
+
 
 def to_code(config):
     for conf in config:
-        pin = gpio_output_pin_expression(conf[CONF_PIN])
-        rhs = App.make_power_supply(pin)
-        psu = Pvariable('PowerSupplyComponent', conf[CONF_ID], rhs)
+        rhs = App.make_power_supply(gpio_output_pin_expression(conf[CONF_PIN]))
+        psu = Pvariable(PowerSupplyComponent, conf[CONF_ID], rhs)
         if CONF_ENABLE_TIME in conf:
             add(psu.set_enable_time(conf[CONF_ENABLE_TIME]))
         if CONF_KEEP_ON_TIME in conf:
diff --git a/esphomeyaml/components/sensor/__init__.py b/esphomeyaml/components/sensor/__init__.py
index 2c0be9c8e..c9a8ac46b 100644
--- a/esphomeyaml/components/sensor/__init__.py
+++ b/esphomeyaml/components/sensor/__init__.py
@@ -1,13 +1,15 @@
 import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
+from esphomeyaml import automation
 from esphomeyaml.const import CONF_ACCURACY_DECIMALS, CONF_ALPHA, CONF_DEBOUNCE, CONF_DELTA, \
     CONF_EXPIRE_AFTER, CONF_EXPONENTIAL_MOVING_AVERAGE, CONF_FILTERS, CONF_FILTER_NAN, \
-    CONF_FILTER_OUT, CONF_HEARTBEAT, CONF_ICON, CONF_LAMBDA, CONF_MQTT_ID, CONF_MULTIPLY, \
-    CONF_NAME, CONF_OFFSET, CONF_OR, CONF_SEND_EVERY, CONF_SLIDING_WINDOW_MOVING_AVERAGE, \
-    CONF_THROTTLE, CONF_UNIQUE, CONF_UNIT_OF_MEASUREMENT, CONF_WINDOW_SIZE
-from esphomeyaml.helpers import App, ArrayInitializer, MockObj, Pvariable, RawExpression, add, \
-    setup_mqtt_component
+    CONF_FILTER_OUT, CONF_HEARTBEAT, CONF_ICON, CONF_ID, CONF_LAMBDA, CONF_MAX, CONF_MIN, \
+    CONF_MQTT_ID, CONF_MULTIPLY, CONF_NAME, CONF_OFFSET, CONF_ON_RAW_VALUE, CONF_ON_VALUE, \
+    CONF_ON_VALUE_RANGE, CONF_OR, CONF_SEND_EVERY, CONF_SLIDING_WINDOW_MOVING_AVERAGE, \
+    CONF_THROTTLE, CONF_TRIGGER_ID, CONF_UNIQUE, CONF_UNIT_OF_MEASUREMENT, CONF_WINDOW_SIZE
+from esphomeyaml.helpers import App, ArrayInitializer, NAN, Pvariable, add, esphomelib_ns, float_, \
+    process_lambda, setup_mqtt_component, templatable
 
 PLATFORM_SCHEMA = cv.PLATFORM_SCHEMA.extend({
 
@@ -18,91 +20,102 @@ def validate_recursive_filter(value):
     return FILTERS_SCHEMA(value)
 
 
-FILTERS_SCHEMA = vol.All(cv.ensure_list, [vol.Any(
-    vol.Schema({vol.Required(CONF_OFFSET): vol.Coerce(float)}),
-    vol.Schema({vol.Required(CONF_MULTIPLY): vol.Coerce(float)}),
-    vol.Schema({vol.Required(CONF_FILTER_OUT): vol.Coerce(float)}),
-    vol.Schema({vol.Required(CONF_FILTER_NAN): None}),
-    vol.Schema({
-        vol.Required(CONF_SLIDING_WINDOW_MOVING_AVERAGE): vol.Schema({
-            vol.Required(CONF_WINDOW_SIZE): cv.positive_not_null_int,
-            vol.Required(CONF_SEND_EVERY): cv.positive_not_null_int,
-        })
-    }),
-    vol.Schema({
-        vol.Required(CONF_EXPONENTIAL_MOVING_AVERAGE): vol.Schema({
-            vol.Required(CONF_ALPHA): cv.positive_float,
-            vol.Required(CONF_SEND_EVERY): cv.positive_not_null_int,
-        })
-    }),
-    vol.Schema({vol.Required(CONF_LAMBDA): cv.string_strict}),
-    vol.Schema({vol.Required(CONF_THROTTLE): cv.positive_time_period_milliseconds}),
-    vol.Schema({vol.Required(CONF_DELTA): vol.Coerce(float)}),
-    vol.Schema({vol.Required(CONF_UNIQUE): None}),
-    vol.Schema({vol.Required(CONF_HEARTBEAT): cv.positive_time_period_milliseconds}),
-    vol.Schema({vol.Required(CONF_DEBOUNCE): cv.positive_time_period_milliseconds}),
-    vol.Schema({vol.Required(CONF_OR): validate_recursive_filter}),
-)])
+FILTER_KEYS = [CONF_OFFSET, CONF_MULTIPLY, CONF_FILTER_OUT, CONF_FILTER_NAN,
+               CONF_SLIDING_WINDOW_MOVING_AVERAGE, CONF_EXPONENTIAL_MOVING_AVERAGE, CONF_LAMBDA,
+               CONF_THROTTLE, CONF_DELTA, CONF_UNIQUE, CONF_HEARTBEAT, CONF_DEBOUNCE, CONF_OR]
 
-MQTT_SENSOR_SCHEMA = vol.Schema({
+FILTERS_SCHEMA = vol.All(cv.ensure_list, [vol.All({
+    vol.Optional(CONF_OFFSET): vol.Coerce(float),
+    vol.Optional(CONF_MULTIPLY): vol.Coerce(float),
+    vol.Optional(CONF_FILTER_OUT): vol.Coerce(float),
+    vol.Optional(CONF_FILTER_NAN): None,
+    vol.Optional(CONF_SLIDING_WINDOW_MOVING_AVERAGE): vol.Schema({
+        vol.Required(CONF_WINDOW_SIZE): cv.positive_not_null_int,
+        vol.Required(CONF_SEND_EVERY): cv.positive_not_null_int,
+    }),
+    vol.Optional(CONF_EXPONENTIAL_MOVING_AVERAGE): vol.Schema({
+        vol.Required(CONF_ALPHA): cv.positive_float,
+        vol.Required(CONF_SEND_EVERY): cv.positive_not_null_int,
+    }),
+    vol.Optional(CONF_LAMBDA): cv.lambda_,
+    vol.Optional(CONF_THROTTLE): cv.positive_time_period_milliseconds,
+    vol.Optional(CONF_DELTA): vol.Coerce(float),
+    vol.Optional(CONF_UNIQUE): None,
+    vol.Optional(CONF_HEARTBEAT): cv.positive_time_period_milliseconds,
+    vol.Optional(CONF_DEBOUNCE): cv.positive_time_period_milliseconds,
+    vol.Optional(CONF_OR): validate_recursive_filter,
+}, cv.has_at_exactly_one_key(*FILTER_KEYS))])
+
+SENSOR_SCHEMA = cv.MQTT_COMPONENT_SCHEMA.extend({
+    cv.GenerateID('mqtt_sensor', CONF_MQTT_ID): cv.register_variable_id,
+    cv.GenerateID('sensor'): cv.register_variable_id,
     vol.Required(CONF_NAME): cv.string,
     vol.Optional(CONF_UNIT_OF_MEASUREMENT): cv.string_strict,
     vol.Optional(CONF_ICON): cv.icon,
     vol.Optional(CONF_ACCURACY_DECIMALS): vol.Coerce(int),
     vol.Optional(CONF_EXPIRE_AFTER): vol.Any(None, cv.positive_time_period_milliseconds),
-    vol.Optional(CONF_FILTERS): FILTERS_SCHEMA
-})
-
-MQTT_SENSOR_ID_SCHEMA = MQTT_SENSOR_SCHEMA.extend({
-    cv.GenerateID('mqtt_sensor', CONF_MQTT_ID): cv.register_variable_id,
+    vol.Optional(CONF_FILTERS): FILTERS_SCHEMA,
+    vol.Optional(CONF_ON_VALUE): vol.All(cv.ensure_list, [automation.AUTOMATION_SCHEMA]),
+    vol.Optional(CONF_ON_RAW_VALUE): vol.All(cv.ensure_list, [automation.AUTOMATION_SCHEMA]),
+    vol.Optional(CONF_ON_VALUE_RANGE): vol.All(cv.ensure_list, [vol.All(
+        automation.AUTOMATION_SCHEMA.extend({
+            vol.Optional(CONF_MIN): vol.Coerce(float),
+            vol.Optional(CONF_MAX): vol.Coerce(float),
+        }), cv.has_at_least_one_key(CONF_MIN, CONF_MAX))]),
 })
 
 # pylint: disable=invalid-name
-OffsetFilter = MockObj('new sensor::OffsetFilter')
-MultiplyFilter = MockObj('new sensor::MultiplyFilter')
-FilterOutValueFilter = MockObj('new sensor::FilterOutValueFilter')
-FilterOutNANFilter = MockObj('new sensor::FilterOutNANFilter')
-SlidingWindowMovingAverageFilter = MockObj('new sensor::SlidingWindowMovingAverageFilter')
-ExponentialMovingAverageFilter = MockObj('new sensor::ExponentialMovingAverageFilter')
-LambdaFilter = MockObj('new sensor::LambdaFilter')
-ThrottleFilter = MockObj('new sensor::ThrottleFilter')
-DeltaFilter = MockObj('new sensor::DeltaFilter')
-OrFilter = MockObj('new sensor::OrFilter')
-HeartbeatFilter = MockObj('new sensor::HeartbeatFilter')
-DebounceFilter = MockObj('new sensor::DebounceFilter')
-UniqueFilter = MockObj('new sensor::UniqueFilter')
+sensor_ns = esphomelib_ns.namespace('sensor')
+Sensor = sensor_ns.Sensor
+MQTTSensorComponent = sensor_ns.MQTTSensorComponent
+OffsetFilter = sensor_ns.OffsetFilter
+MultiplyFilter = sensor_ns.MultiplyFilter
+FilterOutValueFilter = sensor_ns.FilterOutValueFilter
+FilterOutNANFilter = sensor_ns.FilterOutNANFilter
+SlidingWindowMovingAverageFilter = sensor_ns.SlidingWindowMovingAverageFilter
+ExponentialMovingAverageFilter = sensor_ns.ExponentialMovingAverageFilter
+LambdaFilter = sensor_ns.LambdaFilter
+ThrottleFilter = sensor_ns.ThrottleFilter
+DeltaFilter = sensor_ns.DeltaFilter
+OrFilter = sensor_ns.OrFilter
+HeartbeatFilter = sensor_ns.HeartbeatFilter
+DebounceFilter = sensor_ns.DebounceFilter
+UniqueFilter = sensor_ns.UniqueFilter
+
+SensorValueTrigger = sensor_ns.SensorValueTrigger
+RawSensorValueTrigger = sensor_ns.RawSensorValueTrigger
+ValueRangeTrigger = sensor_ns.ValueRangeTrigger
 
 
 def setup_filter(config):
     if CONF_OFFSET in config:
-        return OffsetFilter(config[CONF_OFFSET])
+        return OffsetFilter.new(config[CONF_OFFSET])
     if CONF_MULTIPLY in config:
-        return MultiplyFilter(config[CONF_MULTIPLY])
+        return MultiplyFilter.new(config[CONF_MULTIPLY])
     if CONF_FILTER_OUT in config:
-        return FilterOutValueFilter(config[CONF_FILTER_OUT])
+        return FilterOutValueFilter.new(config[CONF_FILTER_OUT])
     if CONF_FILTER_NAN in config:
         return FilterOutNANFilter()
     if CONF_SLIDING_WINDOW_MOVING_AVERAGE in config:
         conf = config[CONF_SLIDING_WINDOW_MOVING_AVERAGE]
-        return SlidingWindowMovingAverageFilter(conf[CONF_WINDOW_SIZE], conf[CONF_SEND_EVERY])
+        return SlidingWindowMovingAverageFilter.new(conf[CONF_WINDOW_SIZE], conf[CONF_SEND_EVERY])
     if CONF_EXPONENTIAL_MOVING_AVERAGE in config:
         conf = config[CONF_EXPONENTIAL_MOVING_AVERAGE]
-        return ExponentialMovingAverageFilter(conf[CONF_ALPHA], conf[CONF_SEND_EVERY])
+        return ExponentialMovingAverageFilter.new(conf[CONF_ALPHA], conf[CONF_SEND_EVERY])
     if CONF_LAMBDA in config:
-        s = u'[](float x) -> Optional<float> {{ return {}; }}'.format(config[CONF_LAMBDA])
-        return LambdaFilter(RawExpression(s))
+        return LambdaFilter.new(process_lambda(config[CONF_LAMBDA], [(float_, 'x')]))
     if CONF_THROTTLE in config:
-        return ThrottleFilter(config[CONF_THROTTLE])
+        return ThrottleFilter.new(config[CONF_THROTTLE])
     if CONF_DELTA in config:
-        return DeltaFilter(config[CONF_DELTA])
+        return DeltaFilter.new(config[CONF_DELTA])
     if CONF_OR in config:
-        return OrFilter(setup_filters(config[CONF_OR]))
+        return OrFilter.new(setup_filters(config[CONF_OR]))
     if CONF_HEARTBEAT in config:
-        return App.register_component(HeartbeatFilter(config[CONF_HEARTBEAT]))
+        return App.register_component(HeartbeatFilter.new(config[CONF_HEARTBEAT]))
     if CONF_DEBOUNCE in config:
-        return App.register_component(DebounceFilter(config[CONF_DEBOUNCE]))
+        return App.register_component(DebounceFilter.new(config[CONF_DEBOUNCE]))
     if CONF_UNIQUE in config:
-        return UniqueFilter()
+        return UniqueFilter.new()
     raise ValueError(u"Filter unsupported: {}".format(config))
 
 
@@ -110,31 +123,54 @@ def setup_filters(config):
     return ArrayInitializer(*[setup_filter(x) for x in config])
 
 
-def setup_mqtt_sensor_component(obj, config):
+def setup_sensor_core_(sensor_var, mqtt_var, config):
+    if CONF_UNIT_OF_MEASUREMENT in config:
+        add(sensor_var.set_unit_of_measurement(config[CONF_UNIT_OF_MEASUREMENT]))
+    if CONF_ICON in config:
+        add(sensor_var.set_icon(config[CONF_ICON]))
+    if CONF_ACCURACY_DECIMALS in config:
+        add(sensor_var.set_accuracy_decimals(config[CONF_ACCURACY_DECIMALS]))
+    if CONF_FILTERS in config:
+        add(sensor_var.set_filters(setup_filters(config[CONF_FILTERS])))
+
+    for conf in config.get(CONF_ON_VALUE, []):
+        rhs = sensor_var.make_value_trigger()
+        trigger = Pvariable(SensorValueTrigger, conf[CONF_TRIGGER_ID], rhs)
+        automation.build_automation(trigger, float_, conf)
+    for conf in config.get(CONF_ON_RAW_VALUE, []):
+        rhs = sensor_var.make_raw_value_trigger()
+        trigger = Pvariable(RawSensorValueTrigger, conf[CONF_TRIGGER_ID], rhs)
+        automation.build_automation(trigger, float_, conf)
+    for conf in config.get(CONF_ON_VALUE_RANGE, []):
+        rhs = sensor_var.make_value_range_trigger()
+        trigger = Pvariable(ValueRangeTrigger, conf[CONF_TRIGGER_ID], rhs)
+        if CONF_MIN in conf:
+            trigger.set_min(templatable(conf[CONF_MIN], float_, float_))
+        if CONF_MAX in conf:
+            trigger.set_max(templatable(conf[CONF_MAX], float_, float_))
+        automation.build_automation(trigger, float_, conf)
+
     if CONF_EXPIRE_AFTER in config:
         if config[CONF_EXPIRE_AFTER] is None:
-            add(obj.disable_expire_after())
+            add(mqtt_var.disable_expire_after())
         else:
-            add(obj.set_expire_after(config[CONF_EXPIRE_AFTER]))
-    setup_mqtt_component(obj, config)
+            add(mqtt_var.set_expire_after(config[CONF_EXPIRE_AFTER]))
+    setup_mqtt_component(mqtt_var, config)
 
 
-def setup_sensor(obj, config):
-    if CONF_UNIT_OF_MEASUREMENT in config:
-        add(obj.set_unit_of_measurement(config[CONF_UNIT_OF_MEASUREMENT]))
-    if CONF_ICON in config:
-        add(obj.set_icon(config[CONF_ICON]))
-    if CONF_ACCURACY_DECIMALS in config:
-        add(obj.set_accuracy_decimals(config[CONF_ACCURACY_DECIMALS]))
-    if CONF_FILTERS in config:
-        add(obj.set_filters(setup_filters(config[CONF_FILTERS])))
+def setup_sensor(sensor_obj, mqtt_obj, config):
+    sensor_var = Pvariable(Sensor, config[CONF_ID], sensor_obj, has_side_effects=False)
+    mqtt_var = Pvariable(MQTTSensorComponent, config[CONF_MQTT_ID], mqtt_obj,
+                         has_side_effects=False)
+    setup_sensor_core_(sensor_var, mqtt_var, config)
 
 
 def register_sensor(var, config):
-    setup_sensor(var, config)
-    rhs = App.register_sensor(var)
-    mqtt_sensor = Pvariable('sensor::MQTTSensorComponent', config[CONF_MQTT_ID], rhs)
-    setup_mqtt_sensor_component(mqtt_sensor, config)
+    sensor_var = Pvariable(Sensor, config[CONF_ID], var, has_side_effects=True)
+    rhs = App.register_sensor(sensor_var)
+    mqtt_var = Pvariable(MQTTSensorComponent, config[CONF_MQTT_ID], rhs,
+                         has_side_effects=True)
+    setup_sensor_core_(sensor_var, mqtt_var, config)
 
 
 BUILD_FLAGS = '-DUSE_SENSOR'
diff --git a/esphomeyaml/components/sensor/adc.py b/esphomeyaml/components/sensor/adc.py
index 7aa02426e..0cfdae36c 100644
--- a/esphomeyaml/components/sensor/adc.py
+++ b/esphomeyaml/components/sensor/adc.py
@@ -3,37 +3,35 @@ import voluptuous as vol
 import esphomeyaml.config_validation as cv
 from esphomeyaml import pins
 from esphomeyaml.components import sensor
-from esphomeyaml.const import CONF_ATTENUATION, CONF_ID, CONF_NAME, CONF_PIN, \
+from esphomeyaml.const import CONF_ATTENUATION, CONF_MAKE_ID, CONF_NAME, CONF_PIN, \
     CONF_UPDATE_INTERVAL
-from esphomeyaml.helpers import App, RawExpression, add, variable
+from esphomeyaml.helpers import App, Application, add, global_ns, variable
 
 ATTENUATION_MODES = {
-    '0db': 'ADC_0db',
-    '2.5db': 'ADC_2_5db',
-    '6db': 'ADC_6db',
-    '11db': 'ADC_11db',
+    '0db': global_ns.ADC_0db,
+    '2.5db': global_ns.ADC_2_5db,
+    '6db': global_ns.ADC_6db,
+    '11db': global_ns.ADC_11db,
 }
 
-ATTENUATION_MODE_SCHEMA = vol.Any(*list(ATTENUATION_MODES.keys()))
-
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('adc'): cv.register_variable_id,
+    cv.GenerateID('adc', CONF_MAKE_ID): cv.register_variable_id,
     vol.Required(CONF_PIN): pins.analog_pin,
-    vol.Optional(CONF_ATTENUATION): vol.All(cv.only_on_esp32, ATTENUATION_MODE_SCHEMA),
+    vol.Optional(CONF_ATTENUATION): vol.All(cv.only_on_esp32, cv.one_of(*ATTENUATION_MODES)),
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
-}).extend(sensor.MQTT_SENSOR_SCHEMA.schema)
+}).extend(sensor.SENSOR_SCHEMA.schema)
+
+MakeADCSensor = Application.MakeADCSensor
 
 
 def to_code(config):
     rhs = App.make_adc_sensor(config[CONF_NAME], config[CONF_PIN],
                               config.get(CONF_UPDATE_INTERVAL))
-    make = variable('Application::MakeADCSensor', config[CONF_ID], rhs)
+    make = variable(MakeADCSensor, config[CONF_MAKE_ID], rhs)
     adc = make.Padc
     if CONF_ATTENUATION in config:
-        attenuation = ATTENUATION_MODES[config[CONF_ATTENUATION]]
-        add(adc.set_attenuation(RawExpression(attenuation)))
-    sensor.setup_sensor(adc, config)
-    sensor.setup_mqtt_sensor_component(make.Pmqtt, config)
+        add(adc.set_attenuation(ATTENUATION_MODES[config[CONF_ATTENUATION]]))
+    sensor.setup_sensor(make.Padc, make.Pmqtt, config)
 
 
 BUILD_FLAGS = '-DUSE_ADC_SENSOR'
diff --git a/esphomeyaml/components/sensor/ads1115.py b/esphomeyaml/components/sensor/ads1115.py
index ffcdca168..be649f12d 100644
--- a/esphomeyaml/components/sensor/ads1115.py
+++ b/esphomeyaml/components/sensor/ads1115.py
@@ -2,30 +2,31 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import sensor
-from esphomeyaml.const import CONF_ADS1115_ID, CONF_GAIN, CONF_MULTIPLEXER, CONF_UPDATE_INTERVAL, \
-    CONF_NAME, CONF_ID
-from esphomeyaml.helpers import RawExpression, get_variable, Pvariable
+from esphomeyaml.components.ads1115 import ADS1115Component
+from esphomeyaml.const import CONF_ADS1115_ID, CONF_GAIN, CONF_MULTIPLEXER, CONF_NAME, \
+    CONF_UPDATE_INTERVAL
+from esphomeyaml.helpers import get_variable
 
 DEPENDENCIES = ['ads1115']
 
 MUX = {
-    'A0_A1': 'sensor::ADS1115_MULTIPLEXER_P0_N1',
-    'A0_A3': 'sensor::ADS1115_MULTIPLEXER_P0_N3',
-    'A1_A3': 'sensor::ADS1115_MULTIPLEXER_P1_N3',
-    'A2_A3': 'sensor::ADS1115_MULTIPLEXER_P2_N3',
-    'A0_GND': 'sensor::ADS1115_MULTIPLEXER_P0_NG',
-    'A1_GND': 'sensor::ADS1115_MULTIPLEXER_P1_NG',
-    'A2_GND': 'sensor::ADS1115_MULTIPLEXER_P2_NG',
-    'A3_GND': 'sensor::ADS1115_MULTIPLEXER_P3_NG',
+    'A0_A1': sensor.sensor_ns.ADS1115_MULTIPLEXER_P0_N1,
+    'A0_A3': sensor.sensor_ns.ADS1115_MULTIPLEXER_P0_N3,
+    'A1_A3': sensor.sensor_ns.ADS1115_MULTIPLEXER_P1_N3,
+    'A2_A3': sensor.sensor_ns.ADS1115_MULTIPLEXER_P2_N3,
+    'A0_GND': sensor.sensor_ns.ADS1115_MULTIPLEXER_P0_NG,
+    'A1_GND': sensor.sensor_ns.ADS1115_MULTIPLEXER_P1_NG,
+    'A2_GND': sensor.sensor_ns.ADS1115_MULTIPLEXER_P2_NG,
+    'A3_GND': sensor.sensor_ns.ADS1115_MULTIPLEXER_P3_NG,
 }
 
 GAIN = {
-    '6.144': 'sensor::ADS1115_GAIN_6P144',
-    '4.096': 'sensor::ADS1115_GAIN_6P096',
-    '2.048': 'sensor::ADS1115_GAIN_2P048',
-    '1.024': 'sensor::ADS1115_GAIN_1P024',
-    '0.512': 'sensor::ADS1115_GAIN_0P512',
-    '0.256': 'sensor::ADS1115_GAIN_0P256',
+    '6.144': sensor.sensor_ns.ADS1115_GAIN_6P144,
+    '4.096': sensor.sensor_ns.ADS1115_GAIN_6P096,
+    '2.048': sensor.sensor_ns.ADS1115_GAIN_2P048,
+    '1.024': sensor.sensor_ns.ADS1115_GAIN_1P024,
+    '0.512': sensor.sensor_ns.ADS1115_GAIN_0P512,
+    '0.256': sensor.sensor_ns.ADS1115_GAIN_0P256,
 }
 
 
@@ -42,21 +43,20 @@ def validate_gain(value):
 
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
     cv.GenerateID('ads1115_sensor'): cv.register_variable_id,
-    vol.Required(CONF_MULTIPLEXER): vol.All(vol.Upper, vol.Any(*list(MUX.keys()))),
+    vol.Required(CONF_MULTIPLEXER): vol.All(vol.Upper, cv.one_of(*MUX)),
     vol.Required(CONF_GAIN): validate_gain,
     vol.Optional(CONF_ADS1115_ID): cv.variable_id,
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
-}).extend(sensor.MQTT_SENSOR_ID_SCHEMA.schema)
+}).extend(sensor.SENSOR_SCHEMA.schema)
 
 
 def to_code(config):
-    hub = get_variable(config.get(CONF_ADS1115_ID), u'sensor::ADS1115Component')
+    hub = get_variable(config.get(CONF_ADS1115_ID), ADS1115Component)
 
-    mux = RawExpression(MUX[config[CONF_MULTIPLEXER]])
-    gain = RawExpression(GAIN[config[CONF_GAIN]])
+    mux = MUX[config[CONF_MULTIPLEXER]]
+    gain = GAIN[config[CONF_GAIN]]
     rhs = hub.get_sensor(config[CONF_NAME], mux, gain, config.get(CONF_UPDATE_INTERVAL))
-    sensor_ = Pvariable('sensor::ADS1115Sensor', config[CONF_ID], rhs)
-    sensor.register_sensor(sensor_, config)
+    sensor.register_sensor(rhs, config)
 
 
 BUILD_FLAGS = '-DUSE_ADS1115_SENSOR'
diff --git a/esphomeyaml/components/sensor/bh1750.py b/esphomeyaml/components/sensor/bh1750.py
index bed6a7803..d119ebdbe 100644
--- a/esphomeyaml/components/sensor/bh1750.py
+++ b/esphomeyaml/components/sensor/bh1750.py
@@ -2,36 +2,36 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import sensor
-from esphomeyaml.const import CONF_ADDRESS, CONF_ID, CONF_NAME, CONF_RESOLUTION, \
+from esphomeyaml.const import CONF_ADDRESS, CONF_MAKE_ID, CONF_NAME, CONF_RESOLUTION, \
     CONF_UPDATE_INTERVAL
-from esphomeyaml.helpers import App, RawExpression, add, variable
+from esphomeyaml.helpers import App, Application, add, variable
 
 DEPENDENCIES = ['i2c']
 
 BH1750_RESOLUTIONS = {
-    4.0: 'sensor::BH1750_RESOLUTION_4P0_LX',
-    1.0: 'sensor::BH1750_RESOLUTION_1P0_LX',
-    0.5: 'sensor::BH1750_RESOLUTION_0P5_LX',
+    4.0: sensor.sensor_ns.BH1750_RESOLUTION_4P0_LX,
+    1.0: sensor.sensor_ns.BH1750_RESOLUTION_1P0_LX,
+    0.5: sensor.sensor_ns.BH1750_RESOLUTION_0P5_LX,
 }
 
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('bh1750_sensor'): cv.register_variable_id,
+    cv.GenerateID('bh1750_sensor', CONF_MAKE_ID): cv.register_variable_id,
     vol.Optional(CONF_ADDRESS, default=0x23): cv.i2c_address,
-    vol.Optional(CONF_RESOLUTION): vol.All(cv.positive_float, vol.Any(*BH1750_RESOLUTIONS)),
+    vol.Optional(CONF_RESOLUTION): vol.All(cv.positive_float, cv.one_of(*BH1750_RESOLUTIONS)),
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
-}).extend(sensor.MQTT_SENSOR_SCHEMA.schema)
+}).extend(sensor.SENSOR_SCHEMA.schema)
+
+MakeBH1750Sensor = Application.MakeBH1750Sensor
 
 
 def to_code(config):
     rhs = App.make_bh1750_sensor(config[CONF_NAME], config[CONF_ADDRESS],
                                  config.get(CONF_UPDATE_INTERVAL))
-    make_bh1750 = variable('Application::MakeBH1750Sensor', config[CONF_ID], rhs)
+    make_bh1750 = variable(MakeBH1750Sensor, config[CONF_MAKE_ID], rhs)
     bh1750 = make_bh1750.Pbh1750
     if CONF_RESOLUTION in config:
-        constant = BH1750_RESOLUTIONS[config[CONF_RESOLUTION]]
-        add(bh1750.set_resolution(RawExpression(constant)))
-    sensor.setup_sensor(bh1750, config)
-    sensor.setup_mqtt_sensor_component(make_bh1750.Pmqtt, config)
+        add(bh1750.set_resolution(BH1750_RESOLUTIONS[config[CONF_RESOLUTION]]))
+    sensor.setup_sensor(bh1750, make_bh1750.Pmqtt, config)
 
 
 BUILD_FLAGS = '-DUSE_BH1750'
diff --git a/esphomeyaml/components/sensor/bme280.py b/esphomeyaml/components/sensor/bme280.py
index 86114831f..3f264aaf2 100644
--- a/esphomeyaml/components/sensor/bme280.py
+++ b/esphomeyaml/components/sensor/bme280.py
@@ -2,44 +2,45 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import sensor
-from esphomeyaml.components.sensor import MQTT_SENSOR_SCHEMA
-from esphomeyaml.const import CONF_ADDRESS, CONF_HUMIDITY, CONF_ID, CONF_IIR_FILTER, CONF_NAME, \
-    CONF_OVERSAMPLING, CONF_PRESSURE, CONF_TEMPERATURE, CONF_UPDATE_INTERVAL
-from esphomeyaml.helpers import App, RawExpression, add, variable
+from esphomeyaml.const import CONF_ADDRESS, CONF_HUMIDITY, CONF_IIR_FILTER, CONF_MAKE_ID, \
+    CONF_NAME, CONF_OVERSAMPLING, CONF_PRESSURE, CONF_TEMPERATURE, CONF_UPDATE_INTERVAL
+from esphomeyaml.helpers import App, Application, add, variable
 
 DEPENDENCIES = ['i2c']
 
 OVERSAMPLING_OPTIONS = {
-    'NONE': 'sensor::BME280_OVERSAMPLING_NONE',
-    '1X': 'sensor::BME280_OVERSAMPLING_1X',
-    '2X': 'sensor::BME280_OVERSAMPLING_2X',
-    '4X': 'sensor::BME280_OVERSAMPLING_4X',
-    '8X': 'sensor::BME280_OVERSAMPLING_8X',
-    '16X': 'sensor::BME280_OVERSAMPLING_16X',
+    'NONE': sensor.sensor_ns.BME280_OVERSAMPLING_NONE,
+    '1X': sensor.sensor_ns.BME280_OVERSAMPLING_1X,
+    '2X': sensor.sensor_ns.BME280_OVERSAMPLING_2X,
+    '4X': sensor.sensor_ns.BME280_OVERSAMPLING_4X,
+    '8X': sensor.sensor_ns.BME280_OVERSAMPLING_8X,
+    '16X': sensor.sensor_ns.BME280_OVERSAMPLING_16X,
 }
 
 IIR_FILTER_OPTIONS = {
-    'OFF': 'sensor::BME280_IIR_FILTER_OFF',
-    '2X': 'sensor::BME280_IIR_FILTER_2X',
-    '4X': 'sensor::BME280_IIR_FILTER_4X',
-    '8X': 'sensor::BME280_IIR_FILTER_8X',
-    '16X': 'sensor::BME280_IIR_FILTER_16X',
+    'OFF': sensor.sensor_ns.BME280_IIR_FILTER_OFF,
+    '2X': sensor.sensor_ns.BME280_IIR_FILTER_2X,
+    '4X': sensor.sensor_ns.BME280_IIR_FILTER_4X,
+    '8X': sensor.sensor_ns.BME280_IIR_FILTER_8X,
+    '16X': sensor.sensor_ns.BME280_IIR_FILTER_16X,
 }
 
-BME280_OVERSAMPLING_SENSOR_SCHEMA = MQTT_SENSOR_SCHEMA.extend({
-    vol.Optional(CONF_OVERSAMPLING): vol.All(vol.Upper, vol.Any(*OVERSAMPLING_OPTIONS)),
+BME280_OVERSAMPLING_SENSOR_SCHEMA = sensor.SENSOR_SCHEMA.extend({
+    vol.Optional(CONF_OVERSAMPLING): vol.All(vol.Upper, cv.one_of(*OVERSAMPLING_OPTIONS)),
 })
 
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('bme280'): cv.register_variable_id,
+    cv.GenerateID('bme280', CONF_MAKE_ID): cv.register_variable_id,
     vol.Optional(CONF_ADDRESS, default=0x77): cv.i2c_address,
     vol.Required(CONF_TEMPERATURE): BME280_OVERSAMPLING_SENSOR_SCHEMA,
     vol.Required(CONF_PRESSURE): BME280_OVERSAMPLING_SENSOR_SCHEMA,
     vol.Required(CONF_HUMIDITY): BME280_OVERSAMPLING_SENSOR_SCHEMA,
-    vol.Optional(CONF_IIR_FILTER): vol.All(vol.Upper, vol.Any(*IIR_FILTER_OPTIONS)),
+    vol.Optional(CONF_IIR_FILTER): vol.All(vol.Upper, cv.one_of(*IIR_FILTER_OPTIONS)),
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
 })
 
+MakeBME280Sensor = Application.MakeBME280Sensor
+
 
 def to_code(config):
     rhs = App.make_bme280_sensor(config[CONF_TEMPERATURE][CONF_NAME],
@@ -47,29 +48,27 @@ def to_code(config):
                                  config[CONF_HUMIDITY][CONF_NAME],
                                  config[CONF_ADDRESS],
                                  config.get(CONF_UPDATE_INTERVAL))
-    make = variable('Application::MakeBME280Sensor', config[CONF_ID], rhs)
+    make = variable(MakeBME280Sensor, config[CONF_MAKE_ID], rhs)
     bme280 = make.Pbme280
     if CONF_OVERSAMPLING in config[CONF_TEMPERATURE]:
         constant = OVERSAMPLING_OPTIONS[config[CONF_TEMPERATURE][CONF_OVERSAMPLING]]
-        add(bme280.set_temperature_oversampling(RawExpression(constant)))
+        add(bme280.set_temperature_oversampling(constant))
     if CONF_OVERSAMPLING in config[CONF_PRESSURE]:
         constant = OVERSAMPLING_OPTIONS[config[CONF_PRESSURE][CONF_OVERSAMPLING]]
-        add(bme280.set_pressure_oversampling(RawExpression(constant)))
+        add(bme280.set_pressure_oversampling(constant))
     if CONF_OVERSAMPLING in config[CONF_HUMIDITY]:
         constant = OVERSAMPLING_OPTIONS[config[CONF_HUMIDITY][CONF_OVERSAMPLING]]
-        add(bme280.set_humidity_oversampling(RawExpression(constant)))
+        add(bme280.set_humidity_oversampling(constant))
     if CONF_IIR_FILTER in config:
         constant = IIR_FILTER_OPTIONS[config[CONF_IIR_FILTER]]
-        add(bme280.set_iir_filter(RawExpression(constant)))
+        add(bme280.set_iir_filter(constant))
 
-    sensor.setup_sensor(bme280.Pget_temperature_sensor(), config[CONF_TEMPERATURE])
-    sensor.setup_mqtt_sensor_component(make.Pmqtt_temperature, config[CONF_TEMPERATURE])
-
-    sensor.setup_sensor(bme280.Pget_pressure_sensor(), config[CONF_PRESSURE])
-    sensor.setup_mqtt_sensor_component(make.Pmqtt_pressure, config[CONF_PRESSURE])
-
-    sensor.setup_sensor(bme280.Pget_humidity_sensor(), config[CONF_HUMIDITY])
-    sensor.setup_mqtt_sensor_component(make.Pmqtt_humidity, config[CONF_HUMIDITY])
+    sensor.setup_sensor(bme280.Pget_temperature_sensor(), make.Pmqtt_temperature,
+                        config[CONF_TEMPERATURE])
+    sensor.setup_sensor(bme280.Pget_pressure_sensor(), make.Pmqtt_pressure,
+                        config[CONF_PRESSURE])
+    sensor.setup_sensor(bme280.Pget_humidity_sensor(), make.Pmqtt_humidity,
+                        config[CONF_HUMIDITY])
 
 
 BUILD_FLAGS = '-DUSE_BME280'
diff --git a/esphomeyaml/components/sensor/bme680.py b/esphomeyaml/components/sensor/bme680.py
index c1dae0878..d717c8a4a 100644
--- a/esphomeyaml/components/sensor/bme680.py
+++ b/esphomeyaml/components/sensor/bme680.py
@@ -2,49 +2,51 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import sensor
-from esphomeyaml.components.sensor import MQTT_SENSOR_SCHEMA
-from esphomeyaml.const import CONF_ADDRESS, CONF_HUMIDITY, CONF_ID, CONF_IIR_FILTER, CONF_NAME, \
-    CONF_OVERSAMPLING, CONF_PRESSURE, CONF_TEMPERATURE, CONF_UPDATE_INTERVAL, CONF_GAS_RESISTANCE
-from esphomeyaml.helpers import App, RawExpression, add, variable
+from esphomeyaml.const import CONF_ADDRESS, CONF_GAS_RESISTANCE, CONF_HUMIDITY, CONF_IIR_FILTER, \
+    CONF_MAKE_ID, CONF_NAME, CONF_OVERSAMPLING, CONF_PRESSURE, CONF_TEMPERATURE, \
+    CONF_UPDATE_INTERVAL
+from esphomeyaml.helpers import App, Application, add, variable
 
 DEPENDENCIES = ['i2c']
 
 OVERSAMPLING_OPTIONS = {
-    'NONE': 'sensor::BME680_OVERSAMPLING_NONE',
-    '1X': 'sensor::BME680_OVERSAMPLING_1X',
-    '2X': 'sensor::BME680_OVERSAMPLING_2X',
-    '4X': 'sensor::BME680_OVERSAMPLING_4X',
-    '8X': 'sensor::BME680_OVERSAMPLING_8X',
-    '16X': 'sensor::BME680_OVERSAMPLING_16X',
+    'NONE': sensor.sensor_ns.BME680_OVERSAMPLING_NONE,
+    '1X': sensor.sensor_ns.BME680_OVERSAMPLING_1X,
+    '2X': sensor.sensor_ns.BME680_OVERSAMPLING_2X,
+    '4X': sensor.sensor_ns.BME680_OVERSAMPLING_4X,
+    '8X': sensor.sensor_ns.BME680_OVERSAMPLING_8X,
+    '16X': sensor.sensor_ns.BME680_OVERSAMPLING_16X,
 }
 
 IIR_FILTER_OPTIONS = {
-    'OFF': 'sensor::BME680_IIR_FILTER_OFF',
-    '1X': 'sensor::BME680_IIR_FILTER_1X',
-    '3X': 'sensor::BME680_IIR_FILTER_3X',
-    '7X': 'sensor::BME680_IIR_FILTER_7X',
-    '15X': 'sensor::BME680_IIR_FILTER_15X',
-    '31X': 'sensor::BME680_IIR_FILTER_31X',
-    '63X': 'sensor::BME680_IIR_FILTER_63X',
-    '127X': 'sensor::BME680_IIR_FILTER_127X',
+    'OFF': sensor.sensor_ns.BME680_IIR_FILTER_OFF,
+    '1X': sensor.sensor_ns.BME680_IIR_FILTER_1X,
+    '3X': sensor.sensor_ns.BME680_IIR_FILTER_3X,
+    '7X': sensor.sensor_ns.BME680_IIR_FILTER_7X,
+    '15X': sensor.sensor_ns.BME680_IIR_FILTER_15X,
+    '31X': sensor.sensor_ns.BME680_IIR_FILTER_31X,
+    '63X': sensor.sensor_ns.BME680_IIR_FILTER_63X,
+    '127X': sensor.sensor_ns.BME680_IIR_FILTER_127X,
 }
 
-BME680_OVERSAMPLING_SENSOR_SCHEMA = MQTT_SENSOR_SCHEMA.extend({
-    vol.Optional(CONF_OVERSAMPLING): vol.All(vol.Upper, vol.Any(*OVERSAMPLING_OPTIONS)),
+BME680_OVERSAMPLING_SENSOR_SCHEMA = sensor.SENSOR_SCHEMA.extend({
+    vol.Optional(CONF_OVERSAMPLING): vol.All(vol.Upper, cv.one_of(*OVERSAMPLING_OPTIONS)),
 })
 
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('bme680'): cv.register_variable_id,
+    cv.GenerateID('bme680', CONF_MAKE_ID): cv.register_variable_id,
     vol.Optional(CONF_ADDRESS, default=0x76): cv.i2c_address,
     vol.Required(CONF_TEMPERATURE): BME680_OVERSAMPLING_SENSOR_SCHEMA,
     vol.Required(CONF_PRESSURE): BME680_OVERSAMPLING_SENSOR_SCHEMA,
     vol.Required(CONF_HUMIDITY): BME680_OVERSAMPLING_SENSOR_SCHEMA,
-    vol.Required(CONF_GAS_RESISTANCE): MQTT_SENSOR_SCHEMA,
-    vol.Optional(CONF_IIR_FILTER): vol.All(vol.Upper, vol.Any(*IIR_FILTER_OPTIONS)),
+    vol.Required(CONF_GAS_RESISTANCE): sensor.SENSOR_SCHEMA,
+    vol.Optional(CONF_IIR_FILTER): vol.All(vol.Upper, cv.one_of(*IIR_FILTER_OPTIONS)),
     # TODO: Heater
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
 })
 
+MakeBME680Sensor = Application.MakeBME680Sensor
+
 
 def to_code(config):
     rhs = App.make_bme680_sensor(config[CONF_TEMPERATURE][CONF_NAME],
@@ -53,32 +55,29 @@ def to_code(config):
                                  config[CONF_GAS_RESISTANCE][CONF_NAME],
                                  config[CONF_ADDRESS],
                                  config.get(CONF_UPDATE_INTERVAL))
-    make = variable('Application::MakeBME680Sensor', config[CONF_ID], rhs)
+    make = variable(MakeBME680Sensor, config[CONF_MAKE_ID], rhs)
     bme680 = make.Pbme680
     if CONF_OVERSAMPLING in config[CONF_TEMPERATURE]:
         constant = OVERSAMPLING_OPTIONS[config[CONF_TEMPERATURE][CONF_OVERSAMPLING]]
-        add(bme680.set_temperature_oversampling(RawExpression(constant)))
+        add(bme680.set_temperature_oversampling(constant))
     if CONF_OVERSAMPLING in config[CONF_PRESSURE]:
         constant = OVERSAMPLING_OPTIONS[config[CONF_PRESSURE][CONF_OVERSAMPLING]]
-        add(bme680.set_pressure_oversampling(RawExpression(constant)))
+        add(bme680.set_pressure_oversampling(constant))
     if CONF_OVERSAMPLING in config[CONF_HUMIDITY]:
         constant = OVERSAMPLING_OPTIONS[config[CONF_HUMIDITY][CONF_OVERSAMPLING]]
-        add(bme680.set_humidity_oversampling(RawExpression(constant)))
+        add(bme680.set_humidity_oversampling(constant))
     if CONF_IIR_FILTER in config:
         constant = IIR_FILTER_OPTIONS[config[CONF_IIR_FILTER]]
-        add(bme680.set_iir_filter(RawExpression(constant)))
+        add(bme680.set_iir_filter(constant))
 
-    sensor.setup_sensor(bme680.Pget_temperature_sensor(), config[CONF_TEMPERATURE])
-    sensor.setup_mqtt_sensor_component(make.Pmqtt_temperature, config[CONF_TEMPERATURE])
-
-    sensor.setup_sensor(bme680.Pget_pressure_sensor(), config[CONF_PRESSURE])
-    sensor.setup_mqtt_sensor_component(make.Pmqtt_pressure, config[CONF_PRESSURE])
-
-    sensor.setup_sensor(bme680.Pget_humidity_sensor(), config[CONF_HUMIDITY])
-    sensor.setup_mqtt_sensor_component(make.Pmqtt_humidity, config[CONF_HUMIDITY])
-
-    sensor.setup_sensor(bme680.Pget_gas_resistance_sensor(), config[CONF_GAS_RESISTANCE])
-    sensor.setup_mqtt_sensor_component(make.Pmqtt_gas_resistance, config[CONF_GAS_RESISTANCE])
+    sensor.setup_sensor(bme680.Pget_temperature_sensor(), make.Pmqtt_temperature,
+                        config[CONF_TEMPERATURE])
+    sensor.setup_sensor(bme680.Pget_pressure_sensor(), make.Pmqtt_pressure,
+                        config[CONF_PRESSURE])
+    sensor.setup_sensor(bme680.Pget_humidity_sensor(), make.Pmqtt_humidity,
+                        config[CONF_HUMIDITY])
+    sensor.setup_sensor(bme680.Pget_gas_resistance_sensor(), make.Pmqtt_gas_resistance,
+                        config[CONF_GAS_RESISTANCE])
 
 
 BUILD_FLAGS = '-DUSE_BME680'
diff --git a/esphomeyaml/components/sensor/bmp085.py b/esphomeyaml/components/sensor/bmp085.py
index 5f6c47ccb..4d63b6b94 100644
--- a/esphomeyaml/components/sensor/bmp085.py
+++ b/esphomeyaml/components/sensor/bmp085.py
@@ -2,33 +2,35 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import sensor
-from esphomeyaml.components.sensor import MQTT_SENSOR_SCHEMA
-from esphomeyaml.const import CONF_ADDRESS, CONF_ID, CONF_NAME, \
-    CONF_PRESSURE, CONF_TEMPERATURE, CONF_UPDATE_INTERVAL
-from esphomeyaml.helpers import App, HexIntLiteral, add, variable
+from esphomeyaml.const import CONF_ADDRESS, CONF_MAKE_ID, CONF_NAME, CONF_PRESSURE, \
+    CONF_TEMPERATURE, CONF_UPDATE_INTERVAL
+from esphomeyaml.helpers import App, HexIntLiteral, add, variable, Application
 
 DEPENDENCIES = ['i2c']
 
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('bmp085_sensor'): cv.register_variable_id,
-    vol.Required(CONF_TEMPERATURE): MQTT_SENSOR_SCHEMA,
-    vol.Required(CONF_PRESSURE): MQTT_SENSOR_SCHEMA,
+    cv.GenerateID('bmp085_sensor', CONF_MAKE_ID): cv.register_variable_id,
+    vol.Required(CONF_TEMPERATURE): sensor.SENSOR_SCHEMA,
+    vol.Required(CONF_PRESSURE): sensor.SENSOR_SCHEMA,
     vol.Optional(CONF_ADDRESS): cv.i2c_address,
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
 })
 
+MakeBMP085Sensor = Application.MakeBMP085Sensor
+
 
 def to_code(config):
     rhs = App.make_bmp085_sensor(config[CONF_TEMPERATURE][CONF_NAME],
                                  config[CONF_PRESSURE][CONF_NAME],
                                  config.get(CONF_UPDATE_INTERVAL))
-    bmp = variable('Application::MakeBMP085Sensor', config[CONF_ID], rhs)
+    bmp = variable(MakeBMP085Sensor, config[CONF_MAKE_ID], rhs)
     if CONF_ADDRESS in config:
         add(bmp.Pbmp.set_address(HexIntLiteral(config[CONF_ADDRESS])))
-    sensor.setup_sensor(bmp.Pbmp.Pget_temperature_sensor(), config[CONF_TEMPERATURE])
-    sensor.setup_mqtt_sensor_component(bmp.Pmqtt_temperature, config[CONF_TEMPERATURE])
-    sensor.setup_sensor(bmp.Pbmp.Pget_pressure_sensor(), config[CONF_PRESSURE])
-    sensor.setup_mqtt_sensor_component(bmp.Pmqtt_pressure, config[CONF_PRESSURE])
+
+    sensor.setup_sensor(bmp.Pbmp.Pget_temperature_sensor(), bmp.Pmqtt_temperature,
+                        config[CONF_TEMPERATURE])
+    sensor.setup_sensor(bmp.Pbmp.Pget_pressure_sensor(), bmp.Pmqtt_pressure,
+                        config[CONF_PRESSURE])
 
 
 BUILD_FLAGS = '-DUSE_BMP085_SENSOR'
diff --git a/esphomeyaml/components/sensor/dallas.py b/esphomeyaml/components/sensor/dallas.py
index 2be1e2b80..d770ee6ec 100644
--- a/esphomeyaml/components/sensor/dallas.py
+++ b/esphomeyaml/components/sensor/dallas.py
@@ -2,23 +2,21 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import sensor
-from esphomeyaml.components.dallas import DALLAS_COMPONENT_CLASS
+from esphomeyaml.components.dallas import DallasComponent
 from esphomeyaml.const import CONF_ADDRESS, CONF_DALLAS_ID, CONF_INDEX, CONF_NAME, \
-    CONF_RESOLUTION, \
-    CONF_UPDATE_INTERVAL, CONF_ID
-from esphomeyaml.helpers import HexIntLiteral, get_variable, Pvariable
+    CONF_RESOLUTION, CONF_UPDATE_INTERVAL
+from esphomeyaml.helpers import HexIntLiteral, get_variable
 
 PLATFORM_SCHEMA = vol.All(sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('dallas_sensor'): cv.register_variable_id,
     vol.Exclusive(CONF_ADDRESS, 'dallas'): cv.hex_int,
     vol.Exclusive(CONF_INDEX, 'dallas'): cv.positive_int,
     vol.Optional(CONF_DALLAS_ID): cv.variable_id,
     vol.Optional(CONF_RESOLUTION): vol.All(vol.Coerce(int), vol.Range(min=8, max=12)),
-}).extend(sensor.MQTT_SENSOR_ID_SCHEMA.schema), cv.has_at_least_one_key(CONF_ADDRESS, CONF_INDEX))
+}).extend(sensor.SENSOR_SCHEMA.schema), cv.has_at_least_one_key(CONF_ADDRESS, CONF_INDEX))
 
 
 def to_code(config):
-    hub = get_variable(config.get(CONF_DALLAS_ID), DALLAS_COMPONENT_CLASS)
+    hub = get_variable(config.get(CONF_DALLAS_ID), DallasComponent)
     update_interval = config.get(CONF_UPDATE_INTERVAL)
     if CONF_RESOLUTION in config and update_interval is None:
         update_interval = 10000
@@ -30,8 +28,7 @@ def to_code(config):
     else:
         rhs = hub.Pget_sensor_by_index(config[CONF_NAME], config[CONF_INDEX],
                                        update_interval, config.get(CONF_RESOLUTION))
-    sensor_ = Pvariable('sensor::DallasTemperatureSensor', config[CONF_ID], rhs)
-    sensor.register_sensor(sensor_, config)
+    sensor.register_sensor(rhs, config)
 
 
 BUILD_FLAGS = '-DUSE_DALLAS_SENSOR'
diff --git a/esphomeyaml/components/sensor/dht.py b/esphomeyaml/components/sensor/dht.py
index 54edae5e7..0b3b28f62 100644
--- a/esphomeyaml/components/sensor/dht.py
+++ b/esphomeyaml/components/sensor/dht.py
@@ -2,43 +2,45 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import sensor
-from esphomeyaml.components.sensor import MQTT_SENSOR_SCHEMA
-from esphomeyaml.const import CONF_HUMIDITY, CONF_ID, CONF_MODEL, CONF_NAME, CONF_PIN, \
+from esphomeyaml.const import CONF_HUMIDITY, CONF_MAKE_ID, CONF_MODEL, CONF_NAME, CONF_PIN, \
     CONF_TEMPERATURE, CONF_UPDATE_INTERVAL
-from esphomeyaml.helpers import App, RawExpression, add, variable, gpio_output_pin_expression
+from esphomeyaml.helpers import App, Application, add, gpio_output_pin_expression, variable
 from esphomeyaml.pins import GPIO_OUTPUT_PIN_SCHEMA
 
 DHT_MODELS = {
-    'AUTO_DETECT': 'sensor::DHT_MODEL_AUTO_DETECT',
-    'DHT11': 'sensor::DHT_MODEL_DHT11',
-    'DHT22': 'sensor::DHT_MODEL_DHT22',
-    'AM2302': 'sensor::DHT_MODEL_AM2302',
-    'RHT03': 'sensor::DHT_MODEL_RHT03',
+    'AUTO_DETECT': sensor.sensor_ns.DHT_MODEL_AUTO_DETECT,
+    'DHT11': sensor.sensor_ns.DHT_MODEL_DHT11,
+    'DHT22': sensor.sensor_ns.DHT_MODEL_DHT22,
+    'AM2302': sensor.sensor_ns.DHT_MODEL_AM2302,
+    'RHT03': sensor.sensor_ns.DHT_MODEL_RHT03,
 }
 
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('dht_sensor'): cv.register_variable_id,
+    cv.GenerateID('dht_sensor', CONF_MAKE_ID): cv.register_variable_id,
     vol.Required(CONF_PIN): GPIO_OUTPUT_PIN_SCHEMA,
-    vol.Required(CONF_TEMPERATURE): MQTT_SENSOR_SCHEMA,
-    vol.Required(CONF_HUMIDITY): MQTT_SENSOR_SCHEMA,
-    vol.Optional(CONF_MODEL): vol.All(vol.Upper, vol.Any(*DHT_MODELS)),
+    vol.Required(CONF_TEMPERATURE): sensor.SENSOR_SCHEMA,
+    vol.Required(CONF_HUMIDITY): sensor.SENSOR_SCHEMA,
+    vol.Optional(CONF_MODEL): vol.All(vol.Upper, cv.one_of(*DHT_MODELS)),
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
 })
 
+MakeDHTSensor = Application.MakeDHTSensor
+
 
 def to_code(config):
     pin = gpio_output_pin_expression(config[CONF_PIN])
     rhs = App.make_dht_sensor(config[CONF_TEMPERATURE][CONF_NAME],
                               config[CONF_HUMIDITY][CONF_NAME],
                               pin, config.get(CONF_UPDATE_INTERVAL))
-    dht = variable('Application::MakeDHTSensor', config[CONF_ID], rhs)
+    dht = variable(MakeDHTSensor, config[CONF_MAKE_ID], rhs)
     if CONF_MODEL in config:
         constant = DHT_MODELS[config[CONF_MODEL]]
-        add(dht.Pdht.set_dht_model(RawExpression(constant)))
-    sensor.setup_sensor(dht.Pdht.Pget_temperature_sensor(), config[CONF_TEMPERATURE])
-    sensor.setup_mqtt_sensor_component(dht.Pmqtt_temperature, config[CONF_TEMPERATURE])
-    sensor.setup_sensor(dht.Pdht.Pget_humidity_sensor(), config[CONF_HUMIDITY])
-    sensor.setup_mqtt_sensor_component(dht.Pmqtt_humidity, config[CONF_HUMIDITY])
+        add(dht.Pdht.set_dht_model(constant))
+
+    sensor.setup_sensor(dht.Pdht.Pget_temperature_sensor(),
+                        dht.Pmqtt_temperature, config[CONF_TEMPERATURE])
+    sensor.setup_sensor(dht.Pdht.Pget_humidity_sensor(),
+                        dht.Pmqtt_humidity, config[CONF_HUMIDITY])
 
 
 BUILD_FLAGS = '-DUSE_DHT_SENSOR'
diff --git a/esphomeyaml/components/sensor/dht12.py b/esphomeyaml/components/sensor/dht12.py
index d440e3a42..c74a6f73a 100644
--- a/esphomeyaml/components/sensor/dht12.py
+++ b/esphomeyaml/components/sensor/dht12.py
@@ -2,30 +2,32 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import sensor
-from esphomeyaml.components.sensor import MQTT_SENSOR_SCHEMA
-from esphomeyaml.const import CONF_HUMIDITY, CONF_ID, CONF_NAME, CONF_TEMPERATURE, \
+from esphomeyaml.const import CONF_HUMIDITY, CONF_MAKE_ID, CONF_NAME, CONF_TEMPERATURE, \
     CONF_UPDATE_INTERVAL
-from esphomeyaml.helpers import App, variable
+from esphomeyaml.helpers import App, Application, variable
 
 DEPENDENCIES = ['i2c']
 
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('dht_sensor'): cv.register_variable_id,
-    vol.Required(CONF_TEMPERATURE): MQTT_SENSOR_SCHEMA,
-    vol.Required(CONF_HUMIDITY): MQTT_SENSOR_SCHEMA,
+    cv.GenerateID('dht_sensor', CONF_MAKE_ID): cv.register_variable_id,
+    vol.Required(CONF_TEMPERATURE): sensor.SENSOR_SCHEMA,
+    vol.Required(CONF_HUMIDITY): sensor.SENSOR_SCHEMA,
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
 })
 
+MakeDHT12Sensor = Application.MakeDHT12Sensor
+
 
 def to_code(config):
     rhs = App.make_dht12_sensor(config[CONF_TEMPERATURE][CONF_NAME],
                                 config[CONF_HUMIDITY][CONF_NAME],
                                 config.get(CONF_UPDATE_INTERVAL))
-    dht = variable('Application::MakeDHT12Sensor', config[CONF_ID], rhs)
-    sensor.setup_sensor(dht.Pdht.Pget_temperature_sensor(), config[CONF_TEMPERATURE])
-    sensor.setup_mqtt_sensor_component(dht.Pmqtt_temperature, config[CONF_TEMPERATURE])
-    sensor.setup_sensor(dht.Pdht.Pget_humidity_sensor(), config[CONF_HUMIDITY])
-    sensor.setup_mqtt_sensor_component(dht.Pmqtt_humidity, config[CONF_HUMIDITY])
+    dht = variable(MakeDHT12Sensor, config[CONF_MAKE_ID], rhs)
+
+    sensor.setup_sensor(dht.Pdht.Pget_temperature_sensor(), dht.Pmqtt_temperature,
+                        config[CONF_TEMPERATURE])
+    sensor.setup_sensor(dht.Pdht.Pget_humidity_sensor(), dht.Pmqtt_humidity,
+                        config[CONF_HUMIDITY])
 
 
 BUILD_FLAGS = '-DUSE_DHT12_SENSOR'
diff --git a/esphomeyaml/components/sensor/hdc1080.py b/esphomeyaml/components/sensor/hdc1080.py
index 25112b1cf..94a9dd6d1 100644
--- a/esphomeyaml/components/sensor/hdc1080.py
+++ b/esphomeyaml/components/sensor/hdc1080.py
@@ -2,30 +2,32 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import sensor
-from esphomeyaml.components.sensor import MQTT_SENSOR_SCHEMA
-from esphomeyaml.const import CONF_HUMIDITY, CONF_ID, CONF_NAME, CONF_TEMPERATURE, \
+from esphomeyaml.const import CONF_HUMIDITY, CONF_MAKE_ID, CONF_NAME, CONF_TEMPERATURE, \
     CONF_UPDATE_INTERVAL
-from esphomeyaml.helpers import App, variable
+from esphomeyaml.helpers import App, variable, Application
 
 DEPENDENCIES = ['i2c']
 
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('dht_sensor'): cv.register_variable_id,
-    vol.Required(CONF_TEMPERATURE): MQTT_SENSOR_SCHEMA,
-    vol.Required(CONF_HUMIDITY): MQTT_SENSOR_SCHEMA,
+    cv.GenerateID('hdc1080_sensor', CONF_MAKE_ID): cv.register_variable_id,
+    vol.Required(CONF_TEMPERATURE): sensor.SENSOR_SCHEMA,
+    vol.Required(CONF_HUMIDITY): sensor.SENSOR_SCHEMA,
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
 })
 
+MakeHDC1080Sensor = Application.MakeHDC1080Sensor
+
 
 def to_code(config):
     rhs = App.make_hdc1080_sensor(config[CONF_TEMPERATURE][CONF_NAME],
                                   config[CONF_HUMIDITY][CONF_NAME],
                                   config.get(CONF_UPDATE_INTERVAL))
-    hdc1080 = variable('Application::MakeHDC1080Sensor', config[CONF_ID], rhs)
-    sensor.setup_sensor(hdc1080.Phdc1080.Pget_temperature_sensor(), config[CONF_TEMPERATURE])
-    sensor.setup_mqtt_sensor_component(hdc1080.Pmqtt_temperature, config[CONF_TEMPERATURE])
-    sensor.setup_sensor(hdc1080.Phdc1080.Pget_humidity_sensor(), config[CONF_HUMIDITY])
-    sensor.setup_mqtt_sensor_component(hdc1080.Pmqtt_humidity, config[CONF_HUMIDITY])
+    hdc1080 = variable(MakeHDC1080Sensor, config[CONF_MAKE_ID], rhs)
+
+    sensor.setup_sensor(hdc1080.Phdc1080.Pget_temperature_sensor(), hdc1080.Pmqtt_temperature,
+                        config[CONF_TEMPERATURE])
+    sensor.setup_sensor(hdc1080.Phdc1080.Pget_humidity_sensor(), hdc1080.Pmqtt_humidity,
+                        config[CONF_HUMIDITY])
 
 
 BUILD_FLAGS = '-DUSE_HDC1080_SENSOR'
diff --git a/esphomeyaml/components/sensor/htu21d.py b/esphomeyaml/components/sensor/htu21d.py
index aa7d2e639..fb8a49a80 100644
--- a/esphomeyaml/components/sensor/htu21d.py
+++ b/esphomeyaml/components/sensor/htu21d.py
@@ -2,30 +2,31 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import sensor
-from esphomeyaml.components.sensor import MQTT_SENSOR_SCHEMA
-from esphomeyaml.const import CONF_HUMIDITY, CONF_ID, CONF_NAME, CONF_TEMPERATURE, \
+from esphomeyaml.const import CONF_HUMIDITY, CONF_MAKE_ID, CONF_NAME, CONF_TEMPERATURE, \
     CONF_UPDATE_INTERVAL
-from esphomeyaml.helpers import App, variable
+from esphomeyaml.helpers import App, variable, Application
 
 DEPENDENCIES = ['i2c']
 
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('htu21d'): cv.register_variable_id,
-    vol.Required(CONF_TEMPERATURE): MQTT_SENSOR_SCHEMA,
-    vol.Required(CONF_HUMIDITY): MQTT_SENSOR_SCHEMA,
+    cv.GenerateID('htu21d', CONF_MAKE_ID): cv.register_variable_id,
+    vol.Required(CONF_TEMPERATURE): sensor.SENSOR_SCHEMA,
+    vol.Required(CONF_HUMIDITY): sensor.SENSOR_SCHEMA,
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
 })
 
+MakeHTU21DSensor = Application.MakeHTU21DSensor
+
 
 def to_code(config):
     rhs = App.make_htu21d_sensor(config[CONF_TEMPERATURE][CONF_NAME],
                                  config[CONF_HUMIDITY][CONF_NAME],
                                  config.get(CONF_UPDATE_INTERVAL))
-    htu21d = variable('Application::MakeHTU21DSensor', config[CONF_ID], rhs)
-    sensor.setup_sensor(htu21d.Phtu21d.Pget_temperature_sensor(), config[CONF_TEMPERATURE])
-    sensor.setup_mqtt_sensor_component(htu21d.Pmqtt_temperature, config[CONF_TEMPERATURE])
-    sensor.setup_sensor(htu21d.Phtu21d.Pget_humidity_sensor(), config[CONF_HUMIDITY])
-    sensor.setup_mqtt_sensor_component(htu21d.Pmqtt_humidity, config[CONF_HUMIDITY])
+    htu21d = variable(MakeHTU21DSensor, config[CONF_MAKE_ID], rhs)
+    sensor.setup_sensor(htu21d.Phtu21d.Pget_temperature_sensor(), htu21d.Pmqtt_temperature,
+                        config[CONF_TEMPERATURE])
+    sensor.setup_sensor(htu21d.Phtu21d.Pget_humidity_sensor(), htu21d.Pmqtt_humidity,
+                        config[CONF_HUMIDITY])
 
 
 BUILD_FLAGS = '-DUSE_HTU21D_SENSOR'
diff --git a/esphomeyaml/components/sensor/max6675.py b/esphomeyaml/components/sensor/max6675.py
new file mode 100644
index 000000000..de0d3e937
--- /dev/null
+++ b/esphomeyaml/components/sensor/max6675.py
@@ -0,0 +1,32 @@
+import voluptuous as vol
+
+import esphomeyaml.config_validation as cv
+from esphomeyaml import pins
+from esphomeyaml.components import sensor
+from esphomeyaml.const import CONF_MAKE_ID, CONF_NAME, CONF_PIN_CLOCK, CONF_PIN_CS, CONF_PIN_MISO, \
+    CONF_UPDATE_INTERVAL
+from esphomeyaml.helpers import App, Application, gpio_input_pin_expression, \
+    gpio_output_pin_expression, variable
+
+PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
+    cv.GenerateID('max6675', CONF_MAKE_ID): cv.register_variable_id,
+    vol.Required(CONF_PIN_CS): pins.GPIO_OUTPUT_PIN_SCHEMA,
+    vol.Required(CONF_PIN_CLOCK): pins.GPIO_OUTPUT_PIN_SCHEMA,
+    vol.Optional(CONF_PIN_MISO): pins.GPIO_INPUT_PIN_SCHEMA,
+    vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
+}).extend(sensor.SENSOR_SCHEMA.schema)
+
+MakeMAX6675Sensor = Application.MakeMAX6675Sensor
+
+
+def to_code(config):
+    pin_cs = gpio_output_pin_expression(config[CONF_PIN_CS])
+    pin_clock = gpio_output_pin_expression(config[CONF_PIN_CLOCK])
+    pin_miso = gpio_input_pin_expression(config[CONF_PIN_MISO])
+    rhs = App.make_max6675_sensor(config[CONF_NAME], pin_cs, pin_clock, pin_miso,
+                                  config.get(CONF_UPDATE_INTERVAL))
+    make = variable(MakeMAX6675Sensor, config[CONF_MAKE_ID], rhs)
+    sensor.setup_sensor(make.Pmax6675, make.Pmqtt, config)
+
+
+BUILD_FLAGS = '-DUSE_MAX6675_SENSOR'
diff --git a/esphomeyaml/components/sensor/mpu6050.py b/esphomeyaml/components/sensor/mpu6050.py
index f936a1b2f..0d7ee1659 100644
--- a/esphomeyaml/components/sensor/mpu6050.py
+++ b/esphomeyaml/components/sensor/mpu6050.py
@@ -2,8 +2,8 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import sensor
-from esphomeyaml.components.sensor import MQTT_SENSOR_ID_SCHEMA
-from esphomeyaml.const import CONF_ADDRESS, CONF_ID, CONF_MQTT_ID, CONF_NAME, CONF_TEMPERATURE, \
+from esphomeyaml.const import CONF_ADDRESS, CONF_MAKE_ID, CONF_MQTT_ID, CONF_NAME, \
+    CONF_TEMPERATURE, \
     CONF_UPDATE_INTERVAL
 from esphomeyaml.helpers import App, Pvariable
 
@@ -16,57 +16,63 @@ CONF_GYRO_X = 'gyro_x'
 CONF_GYRO_Y = 'gyro_y'
 CONF_GYRO_Z = 'gyro_z'
 
-PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('mpu6050'): cv.register_variable_id,
+PLATFORM_SCHEMA = vol.All(sensor.PLATFORM_SCHEMA.extend({
+    cv.GenerateID('mpu6050', CONF_MAKE_ID): cv.register_variable_id,
     vol.Optional(CONF_ADDRESS, default=0x68): cv.i2c_address,
-    vol.Optional(CONF_ACCEL_X): MQTT_SENSOR_ID_SCHEMA,
-    vol.Optional(CONF_ACCEL_Y): MQTT_SENSOR_ID_SCHEMA,
-    vol.Optional(CONF_ACCEL_Z): MQTT_SENSOR_ID_SCHEMA,
-    vol.Optional(CONF_GYRO_X): MQTT_SENSOR_ID_SCHEMA,
-    vol.Optional(CONF_GYRO_Y): MQTT_SENSOR_ID_SCHEMA,
-    vol.Optional(CONF_GYRO_Z): MQTT_SENSOR_ID_SCHEMA,
-    vol.Optional(CONF_TEMPERATURE): MQTT_SENSOR_ID_SCHEMA,
+    vol.Optional(CONF_ACCEL_X): sensor.SENSOR_SCHEMA,
+    vol.Optional(CONF_ACCEL_Y): sensor.SENSOR_SCHEMA,
+    vol.Optional(CONF_ACCEL_Z): sensor.SENSOR_SCHEMA,
+    vol.Optional(CONF_GYRO_X): sensor.SENSOR_SCHEMA,
+    vol.Optional(CONF_GYRO_Y): sensor.SENSOR_SCHEMA,
+    vol.Optional(CONF_GYRO_Z): sensor.SENSOR_SCHEMA,
+    vol.Optional(CONF_TEMPERATURE): sensor.SENSOR_SCHEMA,
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
-})
+}), cv.has_at_least_one_key(CONF_ACCEL_X, CONF_ACCEL_Y, CONF_ACCEL_Z,
+                            CONF_GYRO_X, CONF_GYRO_Y, CONF_GYRO_Z))
+
+MPU6050Component = sensor.sensor_ns.MPU6050Component
+MPU6050AccelSensor = sensor.sensor_ns.MPU6050AccelSensor
+MPU6050GyroSensor = sensor.sensor_ns.MPU6050GyroSensor
+MPU6050TemperatureSensor = sensor.sensor_ns.MPU6050TemperatureSensor
 
 
 def to_code(config):
     rhs = App.make_mpu6050_sensor(config[CONF_ADDRESS], config.get(CONF_UPDATE_INTERVAL))
-    mpu = Pvariable('sensor::MPU6050Component', config[CONF_ID], rhs)
+    mpu = Pvariable(MPU6050Component, config[CONF_MAKE_ID], rhs)
     if CONF_ACCEL_X in config:
         conf = config[CONF_ACCEL_X]
         rhs = mpu.Pmake_accel_x_sensor(conf[CONF_NAME])
-        sensor_ = Pvariable('sensor::MPU6050AccelSensor', conf[CONF_MQTT_ID], rhs)
+        sensor_ = Pvariable(MPU6050AccelSensor, conf[CONF_MQTT_ID], rhs)
         sensor.register_sensor(sensor_, conf)
     if CONF_ACCEL_Y in config:
         conf = config[CONF_ACCEL_Y]
         rhs = mpu.Pmake_accel_y_sensor(conf[CONF_NAME])
-        sensor_ = Pvariable('sensor::MPU6050AccelSensor', conf[CONF_MQTT_ID], rhs)
+        sensor_ = Pvariable(MPU6050AccelSensor, conf[CONF_MQTT_ID], rhs)
         sensor.register_sensor(sensor_, conf)
     if CONF_ACCEL_Z in config:
         conf = config[CONF_ACCEL_Z]
         rhs = mpu.Pmake_accel_z_sensor(conf[CONF_NAME])
-        sensor_ = Pvariable('sensor::MPU6050AccelSensor', conf[CONF_MQTT_ID], rhs)
+        sensor_ = Pvariable(MPU6050AccelSensor, conf[CONF_MQTT_ID], rhs)
         sensor.register_sensor(sensor_, conf)
     if CONF_GYRO_X in config:
         conf = config[CONF_GYRO_X]
         rhs = mpu.Pmake_gyro_x_sensor(conf[CONF_NAME])
-        sensor_ = Pvariable('sensor::MPU6050GyroSensor', conf[CONF_MQTT_ID], rhs)
+        sensor_ = Pvariable(MPU6050GyroSensor, conf[CONF_MQTT_ID], rhs)
         sensor.register_sensor(sensor_, conf)
     if CONF_GYRO_Y in config:
         conf = config[CONF_GYRO_Y]
         rhs = mpu.Pmake_gyro_y_sensor(conf[CONF_NAME])
-        sensor_ = Pvariable('sensor::MPU6050GyroSensor', conf[CONF_MQTT_ID], rhs)
+        sensor_ = Pvariable(MPU6050GyroSensor, conf[CONF_MQTT_ID], rhs)
         sensor.register_sensor(sensor_, conf)
     if CONF_GYRO_Z in config:
         conf = config[CONF_GYRO_Z]
         rhs = mpu.Pmake_gyro_z_sensor(conf[CONF_NAME])
-        sensor_ = Pvariable('sensor::MPU6050GyroSensor', conf[CONF_MQTT_ID], rhs)
+        sensor_ = Pvariable(MPU6050GyroSensor, conf[CONF_MQTT_ID], rhs)
         sensor.register_sensor(sensor_, conf)
     if CONF_TEMPERATURE in config:
         conf = config[CONF_TEMPERATURE]
         rhs = mpu.Pmake_temperature_sensor(conf[CONF_NAME])
-        sensor_ = Pvariable('sensor::MPU6050TemperatureSensor', conf[CONF_MQTT_ID], rhs)
+        sensor_ = Pvariable(MPU6050TemperatureSensor, conf[CONF_MQTT_ID], rhs)
         sensor.register_sensor(sensor_, conf)
 
 
diff --git a/esphomeyaml/components/sensor/pulse_counter.py b/esphomeyaml/components/sensor/pulse_counter.py
index 86736fdc7..93eb12acc 100644
--- a/esphomeyaml/components/sensor/pulse_counter.py
+++ b/esphomeyaml/components/sensor/pulse_counter.py
@@ -3,32 +3,32 @@ import voluptuous as vol
 import esphomeyaml.config_validation as cv
 from esphomeyaml import pins
 from esphomeyaml.components import sensor
-from esphomeyaml.const import CONF_COUNT_MODE, CONF_FALLING_EDGE, CONF_ID, CONF_INTERNAL_FILTER, \
-    CONF_NAME, CONF_PIN, CONF_PULL_MODE, CONF_RISING_EDGE, CONF_UPDATE_INTERVAL, \
+from esphomeyaml.const import CONF_COUNT_MODE, CONF_FALLING_EDGE, CONF_INTERNAL_FILTER, \
+    CONF_MAKE_ID, CONF_NAME, CONF_PIN, CONF_PULL_MODE, CONF_RISING_EDGE, CONF_UPDATE_INTERVAL, \
     ESP_PLATFORM_ESP32
-from esphomeyaml.helpers import App, RawExpression, add, variable
+from esphomeyaml.helpers import App, add, global_ns, variable, Application
 
 ESP_PLATFORMS = [ESP_PLATFORM_ESP32]
 
 GPIO_PULL_MODES = {
-    'PULLUP': 'GPIO_PULLUP_ONLY',
-    'PULLDOWN': 'GPIO_PULLDOWN_ONLY',
-    'PULLUP_PULLDOWN': 'GPIO_PULLUP_PULLDOWN',
-    'FLOATING': 'GPIO_FLOATING',
+    'PULLUP': global_ns.GPIO_PULLUP_ONLY,
+    'PULLDOWN': global_ns.GPIO_PULLDOWN_ONLY,
+    'PULLUP_PULLDOWN': global_ns.GPIO_PULLUP_PULLDOWN,
+    'FLOATING': global_ns.GPIO_FLOATING,
 }
 
-GPIO_PULL_MODE_SCHEMA = vol.All(vol.Upper, vol.Any(*list(GPIO_PULL_MODES.keys())))
+GPIO_PULL_MODE_SCHEMA = vol.All(vol.Upper, cv.one_of(*GPIO_PULL_MODES))
 
 COUNT_MODES = {
-    'DISABLE': 'PCNT_COUNT_DIS',
-    'INCREMENT': 'PCNT_COUNT_INC',
-    'DECREMENT': 'PCNT_COUNT_DEC',
+    'DISABLE': global_ns.PCNT_COUNT_DIS,
+    'INCREMENT': global_ns.PCNT_COUNT_INC,
+    'DECREMENT': global_ns.PCNT_COUNT_DEC,
 }
 
-COUNT_MODE_SCHEMA = vol.All(vol.Upper, vol.Any(*list(COUNT_MODES.keys())))
+COUNT_MODE_SCHEMA = vol.All(vol.Upper, cv.one_of(COUNT_MODES))
 
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('pulse_counter'): cv.register_variable_id,
+    cv.GenerateID('pulse_counter', CONF_MAKE_ID): cv.register_variable_id,
     vol.Required(CONF_PIN): pins.input_pin,
     vol.Optional(CONF_PULL_MODE): GPIO_PULL_MODE_SCHEMA,
     vol.Optional(CONF_COUNT_MODE): vol.Schema({
@@ -37,26 +37,27 @@ PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
     }),
     vol.Optional(CONF_INTERNAL_FILTER): vol.All(vol.Coerce(int), vol.Range(min=0, max=1023)),
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
-}).extend(sensor.MQTT_SENSOR_SCHEMA.schema)
+}).extend(sensor.SENSOR_SCHEMA.schema)
+
+MakePulseCounterSensor = Application.MakePulseCounterSensor
 
 
 def to_code(config):
     rhs = App.make_pulse_counter_sensor(config[CONF_NAME], config[CONF_PIN],
                                         config.get(CONF_UPDATE_INTERVAL))
-    make = variable('Application::MakePulseCounterSensor', config[CONF_ID], rhs)
+    make = variable(MakePulseCounterSensor, config[CONF_MAKE_ID], rhs)
     pcnt = make.Ppcnt
     if CONF_PULL_MODE in config:
         pull_mode = GPIO_PULL_MODES[config[CONF_PULL_MODE]]
-        add(pcnt.set_pull_mode(RawExpression(pull_mode)))
+        add(pcnt.set_pull_mode(pull_mode))
     if CONF_COUNT_MODE in config:
         count_mode = config[CONF_COUNT_MODE]
         rising_edge = COUNT_MODES[count_mode[CONF_RISING_EDGE]]
         falling_edge = COUNT_MODES[count_mode[CONF_FALLING_EDGE]]
-        add(pcnt.set_edge_mode(RawExpression(rising_edge), RawExpression(falling_edge)))
+        add(pcnt.set_edge_mode(rising_edge, falling_edge))
     if CONF_INTERNAL_FILTER in config:
         add(pcnt.set_filter(config[CONF_INTERNAL_FILTER]))
-    sensor.setup_sensor(pcnt, config)
-    sensor.setup_mqtt_sensor_component(make.Pmqtt, config)
+    sensor.setup_sensor(make.Ppcnt, make.Pmqtt, config)
 
 
 BUILD_FLAGS = '-DUSE_PULSE_COUNTER_SENSOR'
diff --git a/esphomeyaml/components/sensor/rotary_encoder.py b/esphomeyaml/components/sensor/rotary_encoder.py
index c470da5cd..dbdef902e 100644
--- a/esphomeyaml/components/sensor/rotary_encoder.py
+++ b/esphomeyaml/components/sensor/rotary_encoder.py
@@ -3,13 +3,13 @@ import voluptuous as vol
 import esphomeyaml.config_validation as cv
 from esphomeyaml import pins
 from esphomeyaml.components import sensor
-from esphomeyaml.const import CONF_ID, CONF_NAME, CONF_RESOLUTION
-from esphomeyaml.helpers import App, RawExpression, add, gpio_input_pin_expression, variable
+from esphomeyaml.const import CONF_MAKE_ID, CONF_NAME, CONF_RESOLUTION
+from esphomeyaml.helpers import App, Application, add, gpio_input_pin_expression, variable
 
 RESOLUTIONS = {
-    '1': 'sensor::ROTARY_ENCODER_1_PULSE_PER_CYCLE',
-    '2': 'sensor::ROTARY_ENCODER_2_PULSES_PER_CYCLE',
-    '4': 'sensor::ROTARY_ENCODER_4_PULSES_PER_CYCLE',
+    '1': sensor.sensor_ns.ROTARY_ENCODER_1_PULSE_PER_CYCLE,
+    '2': sensor.sensor_ns.ROTARY_ENCODER_2_PULSES_PER_CYCLE,
+    '4': sensor.sensor_ns.ROTARY_ENCODER_4_PULSES_PER_CYCLE,
 }
 
 CONF_PIN_A = 'pin_a'
@@ -17,28 +17,29 @@ CONF_PIN_B = 'pin_b'
 CONF_PIN_RESET = 'pin_reset'
 
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('rotary_encoder'): cv.register_variable_id,
+    cv.GenerateID('rotary_encoder', CONF_MAKE_ID): cv.register_variable_id,
     vol.Required(CONF_PIN_A): pins.GPIO_INTERNAL_INPUT_PIN_SCHEMA,
     vol.Required(CONF_PIN_B): pins.GPIO_INTERNAL_INPUT_PIN_SCHEMA,
     vol.Optional(CONF_PIN_RESET): pins.GPIO_INTERNAL_INPUT_PIN_SCHEMA,
-    vol.Optional(CONF_RESOLUTION): vol.All(cv.string, vol.Any(*RESOLUTIONS)),
-}).extend(sensor.MQTT_SENSOR_SCHEMA.schema)
+    vol.Optional(CONF_RESOLUTION): vol.All(cv.string, cv.one_of(*RESOLUTIONS)),
+}).extend(sensor.SENSOR_SCHEMA.schema)
+
+MakeRotaryEncoderSensor = Application.MakeRotaryEncoderSensor
 
 
 def to_code(config):
     pin_a = gpio_input_pin_expression(config[CONF_PIN_A])
     pin_b = gpio_input_pin_expression(config[CONF_PIN_B])
     rhs = App.make_rotary_encoder_sensor(config[CONF_NAME], pin_a, pin_b)
-    make = variable('Application::MakeRotaryEncoderSensor', config[CONF_ID], rhs)
+    make = variable(MakeRotaryEncoderSensor, config[CONF_MAKE_ID], rhs)
     encoder = make.Protary_encoder
     if CONF_PIN_RESET in config:
         pin_i = gpio_input_pin_expression(config[CONF_PIN_RESET])
         add(encoder.set_reset_pin(pin_i))
     if CONF_RESOLUTION in config:
         resolution = RESOLUTIONS[config[CONF_RESOLUTION]]
-        add(encoder.set_resolution(RawExpression(resolution)))
-    sensor.setup_sensor(encoder, config)
-    sensor.setup_mqtt_sensor_component(make.Pmqtt, config)
+        add(encoder.set_resolution(resolution))
+    sensor.setup_sensor(encoder, make.Pmqtt, config)
 
 
 BUILD_FLAGS = '-DUSE_ROTARY_ENCODER_SENSOR'
diff --git a/esphomeyaml/components/sensor/sht3xd.py b/esphomeyaml/components/sensor/sht3xd.py
index a996e39dc..3c87770dd 100644
--- a/esphomeyaml/components/sensor/sht3xd.py
+++ b/esphomeyaml/components/sensor/sht3xd.py
@@ -2,44 +2,43 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import sensor
-from esphomeyaml.components.sensor import MQTT_SENSOR_SCHEMA
-from esphomeyaml.const import CONF_HUMIDITY, CONF_ID, CONF_NAME, CONF_TEMPERATURE, \
-    CONF_UPDATE_INTERVAL, CONF_ADDRESS, CONF_ACCURACY
-from esphomeyaml.helpers import App, variable, RawExpression, add
+from esphomeyaml.const import CONF_ACCURACY, CONF_ADDRESS, CONF_HUMIDITY, CONF_MAKE_ID, CONF_NAME, \
+    CONF_TEMPERATURE, CONF_UPDATE_INTERVAL
+from esphomeyaml.helpers import App, Application, add, variable
 
 DEPENDENCIES = ['i2c']
 
 SHT_ACCURACIES = {
-    'LOW': 'sensor::SHT3XD_ACCURACY_LOW',
-    'MEDIUM': 'sensor::SHT3XD_ACCURACY_MEDIUM',
-    'HIGH': 'sensor::SHT3XD_ACCURACY_HIGH',
+    'LOW': sensor.sensor_ns.SHT3XD_ACCURACY_LOW,
+    'MEDIUM': sensor.sensor_ns.SHT3XD_ACCURACY_MEDIUM,
+    'HIGH': sensor.sensor_ns.SHT3XD_ACCURACY_HIGH,
 }
 
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('sht3xd'): cv.register_variable_id,
-    vol.Required(CONF_TEMPERATURE): MQTT_SENSOR_SCHEMA,
-    vol.Required(CONF_HUMIDITY): MQTT_SENSOR_SCHEMA,
+    cv.GenerateID('sht3xd', CONF_MAKE_ID): cv.register_variable_id,
+    vol.Required(CONF_TEMPERATURE): sensor.SENSOR_SCHEMA,
+    vol.Required(CONF_HUMIDITY): sensor.SENSOR_SCHEMA,
     vol.Optional(CONF_ADDRESS, default=0x44): cv.i2c_address,
-    vol.Optional(CONF_ACCURACY): vol.All(vol.Upper, vol.Any(*SHT_ACCURACIES)),
+    vol.Optional(CONF_ACCURACY): vol.All(vol.Upper, cv.one_of(*SHT_ACCURACIES)),
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
 })
 
+MakeSHT3XDSensor = Application.MakeSHT3XDSensor
+
 
 def to_code(config):
     rhs = App.make_sht3xd_sensor(config[CONF_TEMPERATURE][CONF_NAME],
                                  config[CONF_HUMIDITY][CONF_NAME],
                                  config.get(CONF_UPDATE_INTERVAL))
-    sht3xd = variable('Application::MakeSHT3XDSensor', config[CONF_ID], rhs)
+    sht3xd = variable(MakeSHT3XDSensor, config[CONF_MAKE_ID], rhs)
 
     if CONF_ACCURACY in config:
-        constant = RawExpression(SHT_ACCURACIES[config[CONF_ACCURACY]])
-        add(sht3xd.Psht3xd.set_accuracy(constant))
+        add(sht3xd.Psht3xd.set_accuracy(SHT_ACCURACIES[config[CONF_ACCURACY]]))
 
-    sensor.setup_sensor(sht3xd.Psht3xd.Pget_temperature_sensor(), config[CONF_TEMPERATURE])
-    sensor.setup_mqtt_sensor_component(sht3xd.Pmqtt_temperature, config[CONF_TEMPERATURE])
-
-    sensor.setup_sensor(sht3xd.PPsht3xd.Pget_humidity_sensor(), config[CONF_HUMIDITY])
-    sensor.setup_mqtt_sensor_component(sht3xd.Pmqtt_humidity, config[CONF_HUMIDITY])
+    sensor.setup_sensor(sht3xd.Psht3xd.Pget_temperature_sensor(), sht3xd.Pmqtt_temperature,
+                        config[CONF_TEMPERATURE])
+    sensor.setup_sensor(sht3xd.Psht3xd.Pget_humidity_sensor(), sht3xd.Pmqtt_humidity,
+                        config[CONF_HUMIDITY])
 
 
 BUILD_FLAGS = '-DUSE_SHT3XD'
diff --git a/esphomeyaml/components/sensor/template.py b/esphomeyaml/components/sensor/template.py
new file mode 100644
index 000000000..6fd20d96c
--- /dev/null
+++ b/esphomeyaml/components/sensor/template.py
@@ -0,0 +1,25 @@
+import voluptuous as vol
+
+import esphomeyaml.config_validation as cv
+from esphomeyaml.components import sensor
+from esphomeyaml.const import CONF_LAMBDA, CONF_MAKE_ID, CONF_NAME, CONF_UPDATE_INTERVAL
+from esphomeyaml.helpers import App, process_lambda, variable, Application
+
+PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
+    cv.GenerateID('template_sensor', CONF_MAKE_ID): cv.register_variable_id,
+    vol.Required(CONF_LAMBDA): cv.lambda_,
+    vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
+}).extend(sensor.SENSOR_SCHEMA.schema)
+
+MakeTemplateSensor = Application.MakeTemplateSensor
+
+
+def to_code(config):
+    template_ = process_lambda(config[CONF_LAMBDA], [])
+    rhs = App.make_template_sensor(config[CONF_NAME], template_,
+                                   config.get(CONF_UPDATE_INTERVAL))
+    make = variable(MakeTemplateSensor, config[CONF_MAKE_ID], rhs)
+    sensor.setup_sensor(make.Ptemplate_, make.Pmqtt, config)
+
+
+BUILD_FLAGS = '-DUSE_TEMPLATE_SENSOR'
diff --git a/esphomeyaml/components/sensor/tsl2561.py b/esphomeyaml/components/sensor/tsl2561.py
index 4445f043a..72c880476 100644
--- a/esphomeyaml/components/sensor/tsl2561.py
+++ b/esphomeyaml/components/sensor/tsl2561.py
@@ -2,20 +2,20 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import sensor
-from esphomeyaml.const import CONF_ADDRESS, CONF_GAIN, CONF_ID, CONF_INTEGRATION_TIME, CONF_NAME, \
-    CONF_UPDATE_INTERVAL
-from esphomeyaml.helpers import App, RawExpression, add, variable
+from esphomeyaml.const import CONF_ADDRESS, CONF_GAIN, CONF_INTEGRATION_TIME, CONF_MAKE_ID, \
+    CONF_NAME, CONF_UPDATE_INTERVAL
+from esphomeyaml.helpers import App, Application, add, variable
 
 DEPENDENCIES = ['i2c']
 
 INTEGRATION_TIMES = {
-    14: 'sensor::TSL2561_INTEGRATION_14MS',
-    101: 'sensor::TSL2561_INTEGRATION_101MS',
-    402: 'sensor::TSL2561_INTEGRATION_402MS',
+    14: sensor.sensor_ns.TSL2561_INTEGRATION_14MS,
+    101: sensor.sensor_ns.TSL2561_INTEGRATION_101MS,
+    402: sensor.sensor_ns.TSL2561_INTEGRATION_402MS,
 }
 GAINS = {
-    '1X': 'sensor::TSL2561_GAIN_1X',
-    '16X': 'sensor::TSL2561_GAIN_16X',
+    '1X': sensor.sensor_ns.TSL2561_GAIN_1X,
+    '16X': sensor.sensor_ns.TSL2561_GAIN_16X,
 }
 
 CONF_IS_CS_PACKAGE = 'is_cs_package'
@@ -29,30 +29,29 @@ def validate_integration_time(value):
 
 
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('tsl2561_sensor'): cv.register_variable_id,
+    cv.GenerateID('tsl2561_sensor', CONF_MAKE_ID): cv.register_variable_id,
     vol.Optional(CONF_ADDRESS, default=0x39): cv.i2c_address,
     vol.Optional(CONF_INTEGRATION_TIME): validate_integration_time,
-    vol.Optional(CONF_GAIN): vol.All(vol.Upper, vol.Any(*GAINS)),
+    vol.Optional(CONF_GAIN): vol.All(vol.Upper, cv.one_of(*GAINS)),
     vol.Optional(CONF_IS_CS_PACKAGE): cv.boolean,
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
-}).extend(sensor.MQTT_SENSOR_SCHEMA.schema)
+}).extend(sensor.SENSOR_SCHEMA.schema)
+
+MakeTSL2561Sensor = Application.MakeTSL2561Sensor
 
 
 def to_code(config):
     rhs = App.make_tsl2561_sensor(config[CONF_NAME], config[CONF_ADDRESS],
                                   config.get(CONF_UPDATE_INTERVAL))
-    make_tsl = variable('Application::MakeTSL2561Sensor', config[CONF_ID], rhs)
+    make_tsl = variable(MakeTSL2561Sensor, config[CONF_MAKE_ID], rhs)
     tsl2561 = make_tsl.Ptsl2561
     if CONF_INTEGRATION_TIME in config:
-        constant = INTEGRATION_TIMES[config[CONF_INTEGRATION_TIME]]
-        add(tsl2561.set_integration_time(RawExpression(constant)))
+        add(tsl2561.set_integration_time(INTEGRATION_TIMES[config[CONF_INTEGRATION_TIME]]))
     if CONF_GAIN in config:
-        constant = GAINS[config[CONF_GAIN]]
-        add(tsl2561.set_gain(RawExpression(constant)))
+        add(tsl2561.set_gain(GAINS[config[CONF_GAIN]]))
     if CONF_IS_CS_PACKAGE in config:
         add(tsl2561.set_is_cs_package(config[CONF_IS_CS_PACKAGE]))
-    sensor.setup_sensor(tsl2561, config)
-    sensor.setup_mqtt_sensor_component(make_tsl.Pmqtt, config)
+    sensor.setup_sensor(tsl2561, make_tsl.Pmqtt, config)
 
 
 BUILD_FLAGS = '-DUSE_TSL2561'
diff --git a/esphomeyaml/components/sensor/ultrasonic.py b/esphomeyaml/components/sensor/ultrasonic.py
index 3ea86fb0d..2cde3af02 100644
--- a/esphomeyaml/components/sensor/ultrasonic.py
+++ b/esphomeyaml/components/sensor/ultrasonic.py
@@ -3,19 +3,21 @@ import voluptuous as vol
 import esphomeyaml.config_validation as cv
 from esphomeyaml import pins
 from esphomeyaml.components import sensor
-from esphomeyaml.const import CONF_ECHO_PIN, CONF_ID, CONF_NAME, \
-    CONF_TIMEOUT_METER, CONF_TIMEOUT_TIME, CONF_TRIGGER_PIN, CONF_UPDATE_INTERVAL
-from esphomeyaml.helpers import App, add, variable, gpio_output_pin_expression, \
-    gpio_input_pin_expression
+from esphomeyaml.const import CONF_ECHO_PIN, CONF_MAKE_ID, CONF_NAME, CONF_TIMEOUT_METER, \
+    CONF_TIMEOUT_TIME, CONF_TRIGGER_PIN, CONF_UPDATE_INTERVAL
+from esphomeyaml.helpers import App, Application, add, gpio_input_pin_expression, \
+    gpio_output_pin_expression, variable
 
 PLATFORM_SCHEMA = sensor.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('ultrasonic'): cv.register_variable_id,
+    cv.GenerateID('ultrasonic', CONF_MAKE_ID): cv.register_variable_id,
     vol.Required(CONF_TRIGGER_PIN): pins.GPIO_OUTPUT_PIN_SCHEMA,
     vol.Required(CONF_ECHO_PIN): pins.GPIO_INTERNAL_INPUT_PIN_SCHEMA,
     vol.Exclusive(CONF_TIMEOUT_METER, 'timeout'): cv.positive_float,
     vol.Exclusive(CONF_TIMEOUT_TIME, 'timeout'): cv.positive_time_period_microseconds,
     vol.Optional(CONF_UPDATE_INTERVAL): cv.positive_time_period_milliseconds,
-}).extend(sensor.MQTT_SENSOR_SCHEMA.schema)
+}).extend(sensor.SENSOR_SCHEMA.schema)
+
+MakeUltrasonicSensor = Application.MakeUltrasonicSensor
 
 
 def to_code(config):
@@ -23,14 +25,13 @@ def to_code(config):
     echo = gpio_input_pin_expression(config[CONF_ECHO_PIN])
     rhs = App.make_ultrasonic_sensor(config[CONF_NAME], trigger, echo,
                                      config.get(CONF_UPDATE_INTERVAL))
-    make = variable('Application::MakeUltrasonicSensor', config[CONF_ID], rhs)
+    make = variable(MakeUltrasonicSensor, config[CONF_MAKE_ID], rhs)
     ultrasonic = make.Pultrasonic
     if CONF_TIMEOUT_TIME in config:
         add(ultrasonic.set_timeout_us(config[CONF_TIMEOUT_TIME]))
     elif CONF_TIMEOUT_METER in config:
         add(ultrasonic.set_timeout_m(config[CONF_TIMEOUT_METER]))
-    sensor.setup_sensor(ultrasonic, config)
-    sensor.setup_mqtt_sensor_component(make.Pmqtt, config)
+    sensor.setup_sensor(ultrasonic, make.Pmqtt, config)
 
 
 BUILD_FLAGS = '-DUSE_ULTRASONIC_SENSOR'
diff --git a/esphomeyaml/components/switch/__init__.py b/esphomeyaml/components/switch/__init__.py
index 447c3dde4..04871c324 100644
--- a/esphomeyaml/components/switch/__init__.py
+++ b/esphomeyaml/components/switch/__init__.py
@@ -1,39 +1,50 @@
 import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
-from esphomeyaml.const import CONF_ICON, CONF_INVERTED, CONF_MQTT_ID
-from esphomeyaml.helpers import App, Pvariable, add, setup_mqtt_component
+from esphomeyaml.const import CONF_ICON, CONF_ID, CONF_INVERTED, CONF_MQTT_ID
+from esphomeyaml.helpers import App, Pvariable, add, esphomelib_ns, setup_mqtt_component
 
 PLATFORM_SCHEMA = cv.PLATFORM_SCHEMA.extend({
 
 })
 
-MQTT_SWITCH_SCHEMA = cv.MQTT_COMMAND_COMPONENT_SCHEMA.extend({
+SWITCH_SCHEMA = cv.MQTT_COMMAND_COMPONENT_SCHEMA.extend({
+    cv.GenerateID('switch_'): cv.register_variable_id,
+    cv.GenerateID('mqtt_switch', CONF_MQTT_ID): cv.register_variable_id,
     vol.Optional(CONF_ICON): cv.icon,
     vol.Optional(CONF_INVERTED): cv.boolean,
 })
 
-MQTT_SWITCH_ID_SCHEMA = MQTT_SWITCH_SCHEMA.extend({
-    cv.GenerateID('mqtt_switch', CONF_MQTT_ID): cv.register_variable_id,
-})
+switch_ns = esphomelib_ns.namespace('switch_')
+Switch = switch_ns.Switch
+MQTTSwitchComponent = switch_ns.MQTTSwitchComponent
+ToggleAction = switch_ns.ToggleAction
+TurnOffAction = switch_ns.TurnOffAction
+TurnOnAction = switch_ns.TurnOnAction
 
 
-def setup_mqtt_switch(obj, config):
-    setup_mqtt_component(obj, config)
-
-
-def setup_switch(obj, config):
+def setup_switch_core_(switch_var, mqtt_var, config):
     if CONF_ICON in config:
-        add(obj.set_icon(config[CONF_ICON]))
+        add(switch_var.set_icon(config[CONF_ICON]))
     if CONF_INVERTED in config:
-        add(obj.set_inverted(config[CONF_INVERTED]))
+        add(switch_var.set_inverted(config[CONF_INVERTED]))
+
+    setup_mqtt_component(mqtt_var, config)
+
+
+def setup_switch(switch_obj, mqtt_obj, config):
+    switch_var = Pvariable(Switch, config[CONF_ID], switch_obj, has_side_effects=False)
+    mqtt_var = Pvariable(MQTTSwitchComponent, config[CONF_MQTT_ID], mqtt_obj,
+                         has_side_effects=False)
+    setup_switch_core_(switch_var, mqtt_var, config)
 
 
 def register_switch(var, config):
-    setup_switch(var, config)
-    rhs = App.register_switch(var)
-    mqtt_switch = Pvariable('switch_::MQTTSwitchComponent', config[CONF_MQTT_ID], rhs)
-    setup_mqtt_switch(mqtt_switch, config)
+    switch_var = Pvariable(Switch, config[CONF_ID], var, has_side_effects=True)
+    rhs = App.register_switch(switch_var)
+    mqtt_var = Pvariable(MQTTSwitchComponent, config[CONF_MQTT_ID], rhs,
+                         has_side_effects=True)
+    setup_switch_core_(switch_var, mqtt_var, config)
 
 
 BUILD_FLAGS = '-DUSE_SWITCH'
diff --git a/esphomeyaml/components/switch/gpio.py b/esphomeyaml/components/switch/gpio.py
index cddd13b9f..11cee6387 100644
--- a/esphomeyaml/components/switch/gpio.py
+++ b/esphomeyaml/components/switch/gpio.py
@@ -3,20 +3,21 @@ import voluptuous as vol
 import esphomeyaml.config_validation as cv
 from esphomeyaml import pins
 from esphomeyaml.components import switch
-from esphomeyaml.const import CONF_ID, CONF_NAME, CONF_PIN
-from esphomeyaml.helpers import App, variable, gpio_output_pin_expression
+from esphomeyaml.const import CONF_MAKE_ID, CONF_NAME, CONF_PIN
+from esphomeyaml.helpers import App, Application, gpio_output_pin_expression, variable
 
 PLATFORM_SCHEMA = switch.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('gpio_switch'): cv.register_variable_id,
+    cv.GenerateID('gpio_switch', CONF_MAKE_ID): cv.register_variable_id,
     vol.Required(CONF_PIN): pins.GPIO_OUTPUT_PIN_SCHEMA,
-}).extend(switch.MQTT_SWITCH_SCHEMA.schema)
+}).extend(switch.SWITCH_SCHEMA.schema)
+
+MakeGPIOSwitch = Application.MakeGPIOSwitch
 
 
 def to_code(config):
     rhs = App.make_gpio_switch(config[CONF_NAME], gpio_output_pin_expression(config[CONF_PIN]))
-    gpio = variable('Application::MakeGPIOSwitch', config[CONF_ID], rhs)
-    switch.setup_switch(gpio.Pswitch_, config)
-    switch.setup_mqtt_switch(gpio.Pmqtt, config)
+    gpio = variable(MakeGPIOSwitch, config[CONF_MAKE_ID], rhs)
+    switch.setup_switch(gpio.Pswitch_, gpio.Pmqtt, config)
 
 
 BUILD_FLAGS = '-DUSE_GPIO_SWITCH'
diff --git a/esphomeyaml/components/switch/ir_transmitter.py b/esphomeyaml/components/switch/ir_transmitter.py
index ac35498bc..0b9c21f04 100644
--- a/esphomeyaml/components/switch/ir_transmitter.py
+++ b/esphomeyaml/components/switch/ir_transmitter.py
@@ -2,12 +2,13 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import switch
-from esphomeyaml.components.ir_transmitter import IR_TRANSMITTER_COMPONENT_CLASS
+from esphomeyaml.components.ir_transmitter import IRTransmitterComponent
 from esphomeyaml.const import CONF_ADDRESS, CONF_CARRIER_FREQUENCY, CONF_COMMAND, CONF_DATA, \
-    CONF_ID, CONF_IR_TRANSMITTER_ID, CONF_LG, CONF_NAME, CONF_NBITS, CONF_NEC, CONF_PANASONIC, \
-    CONF_RAW, CONF_REPEAT, CONF_SONY, CONF_TIMES, CONF_WAIT_TIME, CONF_INVERTED
+    CONF_ID, CONF_INVERTED, CONF_IR_TRANSMITTER_ID, CONF_LG, CONF_NAME, CONF_NBITS, CONF_NEC, \
+    CONF_PANASONIC, CONF_RAW, CONF_REPEAT, CONF_SONY, CONF_TIMES, CONF_WAIT_TIME
 from esphomeyaml.core import ESPHomeYAMLError
-from esphomeyaml.helpers import ArrayInitializer, HexIntLiteral, MockObj, Pvariable, get_variable
+from esphomeyaml.helpers import App, ArrayInitializer, HexIntLiteral, Pvariable, \
+    get_variable
 
 DEPENDENCIES = ['ir_transmitter']
 
@@ -46,10 +47,12 @@ PLATFORM_SCHEMA = vol.All(switch.PLATFORM_SCHEMA.extend({
     })),
     vol.Optional(CONF_IR_TRANSMITTER_ID): cv.variable_id,
     vol.Optional(CONF_INVERTED): cv.invalid("IR Transmitters do not support inverted mode!"),
-}).extend(switch.MQTT_SWITCH_ID_SCHEMA.schema), cv.has_at_least_one_key(*IR_KEYS))
+}).extend(switch.SWITCH_SCHEMA.schema), cv.has_at_least_one_key(*IR_KEYS))
 
 # pylint: disable=invalid-name
-SendData = MockObj('switch_::ir::SendData', '::')
+ir_ns = switch.switch_ns.namespace('ir')
+SendData = ir_ns.namespace('SendData')
+DataTransmitter = IRTransmitterComponent.DataTransmitter
 
 
 def safe_hex(value):
@@ -87,17 +90,15 @@ def exp_send_data(config):
         else:
             times = config[CONF_REPEAT][CONF_TIMES]
             wait_us = config[CONF_REPEAT][CONF_WAIT_TIME]
-        base = MockObj(unicode(base), u'.')
         base = base.repeat(times, wait_us)
     return base
 
 
 def to_code(config):
-    ir = get_variable(config.get(CONF_IR_TRANSMITTER_ID), IR_TRANSMITTER_COMPONENT_CLASS)
+    ir = get_variable(config.get(CONF_IR_TRANSMITTER_ID), IRTransmitterComponent)
     send_data = exp_send_data(config)
-    rhs = ir.create_transmitter(config[CONF_NAME], send_data)
-    switch_ = Pvariable(IR_TRANSMITTER_COMPONENT_CLASS + '::DataTransmitter', config[CONF_ID],
-                        rhs)
+    rhs = App.register_component(ir.create_transmitter(config[CONF_NAME], send_data))
+    switch_ = Pvariable(DataTransmitter, config[CONF_ID], rhs)
     switch.register_switch(switch_, config)
 
 
diff --git a/esphomeyaml/components/switch/output.py b/esphomeyaml/components/switch/output.py
index 89832e4ae..c4e4785b0 100644
--- a/esphomeyaml/components/switch/output.py
+++ b/esphomeyaml/components/switch/output.py
@@ -2,21 +2,22 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import switch
-from esphomeyaml.const import CONF_ID, CONF_NAME, CONF_OUTPUT
-from esphomeyaml.helpers import App, get_variable, variable
+from esphomeyaml.const import CONF_MAKE_ID, CONF_NAME, CONF_OUTPUT
+from esphomeyaml.helpers import App, Application, get_variable, variable
 
 PLATFORM_SCHEMA = switch.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('output_switch'): cv.register_variable_id,
+    cv.GenerateID('output_switch', CONF_MAKE_ID): cv.register_variable_id,
     vol.Required(CONF_OUTPUT): cv.variable_id,
-}).extend(switch.MQTT_SWITCH_SCHEMA.schema)
+}).extend(switch.SWITCH_SCHEMA.schema)
+
+MakeSimpleSwitch = Application.MakeSimpleSwitch
 
 
 def to_code(config):
     output = get_variable(config[CONF_OUTPUT])
     rhs = App.make_simple_switch(config[CONF_NAME], output)
-    gpio = variable('Application::MakeSimpleSwitch', config[CONF_ID], rhs)
-    switch.setup_switch(gpio.Pswitch_, config)
-    switch.setup_mqtt_switch(gpio.Pmqtt, config)
+    gpio = variable(MakeSimpleSwitch, config[CONF_MAKE_ID], rhs)
+    switch.setup_switch(gpio.Pswitch_, gpio.Pmqtt, config)
 
 
 BUILD_FLAGS = '-DUSE_SIMPLE_SWITCH'
diff --git a/esphomeyaml/components/switch/restart.py b/esphomeyaml/components/switch/restart.py
index 1eab63288..fd97face6 100644
--- a/esphomeyaml/components/switch/restart.py
+++ b/esphomeyaml/components/switch/restart.py
@@ -2,20 +2,21 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import switch
-from esphomeyaml.const import CONF_ID, CONF_NAME, CONF_INVERTED
-from esphomeyaml.helpers import App, variable
+from esphomeyaml.const import CONF_INVERTED, CONF_MAKE_ID, CONF_NAME
+from esphomeyaml.helpers import App, Application, variable
 
 PLATFORM_SCHEMA = switch.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('restart_switch'): cv.register_variable_id,
+    cv.GenerateID('restart_switch', CONF_MAKE_ID): cv.register_variable_id,
     vol.Optional(CONF_INVERTED): cv.invalid("Restart switches do not support inverted mode!"),
-}).extend(switch.MQTT_SWITCH_SCHEMA.schema)
+}).extend(switch.SWITCH_SCHEMA.schema)
+
+MakeRestartSwitch = Application.MakeRestartSwitch
 
 
 def to_code(config):
     rhs = App.make_restart_switch(config[CONF_NAME])
-    restart = variable('Application::MakeRestartSwitch', config[CONF_ID], rhs)
-    switch.setup_switch(restart.Prestart, config)
-    switch.setup_mqtt_switch(restart.Pmqtt, config)
+    restart = variable(MakeRestartSwitch, config[CONF_MAKE_ID], rhs)
+    switch.setup_switch(restart.Prestart, restart.Pmqtt, config)
 
 
 BUILD_FLAGS = '-DUSE_RESTART_SWITCH'
diff --git a/esphomeyaml/components/switch/shutdown.py b/esphomeyaml/components/switch/shutdown.py
index e3b3f2641..46517c3b2 100644
--- a/esphomeyaml/components/switch/shutdown.py
+++ b/esphomeyaml/components/switch/shutdown.py
@@ -2,21 +2,21 @@ import voluptuous as vol
 
 import esphomeyaml.config_validation as cv
 from esphomeyaml.components import switch
-from esphomeyaml.const import CONF_ID, CONF_NAME, CONF_INVERTED
-from esphomeyaml.helpers import App, variable
+from esphomeyaml.const import CONF_INVERTED, CONF_MAKE_ID, CONF_NAME
+from esphomeyaml.helpers import App, Application, variable
 
 PLATFORM_SCHEMA = switch.PLATFORM_SCHEMA.extend({
-    cv.GenerateID('shutdown_switch'): cv.register_variable_id,
+    cv.GenerateID('shutdown_switch', CONF_MAKE_ID): cv.register_variable_id,
     vol.Optional(CONF_INVERTED): cv.invalid("Shutdown switches do not support inverted mode!"),
-}).extend(switch.MQTT_SWITCH_SCHEMA.schema)
+}).extend(switch.SWITCH_SCHEMA.schema)
+
+MakeShutdownSwitch = Application.MakeShutdownSwitch
 
 
 def to_code(config):
     rhs = App.make_shutdown_switch(config[CONF_NAME])
-    shutdown = variable('Application::MakeShutdownSwitch', config[CONF_ID],
-                        rhs)
-    switch.setup_switch(shutdown.Pshutdown, config)
-    switch.setup_mqtt_switch(shutdown.Pmqtt, config)
+    shutdown = variable(MakeShutdownSwitch, config[CONF_MAKE_ID], rhs)
+    switch.setup_switch(shutdown.Pshutdown, shutdown.Pmqtt, config)
 
 
 BUILD_FLAGS = '-DUSE_SHUTDOWN_SWITCH'
diff --git a/esphomeyaml/components/switch/template.py b/esphomeyaml/components/switch/template.py
new file mode 100644
index 000000000..8c30e4b27
--- /dev/null
+++ b/esphomeyaml/components/switch/template.py
@@ -0,0 +1,35 @@
+import voluptuous as vol
+
+import esphomeyaml.config_validation as cv
+from esphomeyaml import automation
+from esphomeyaml.components import switch
+from esphomeyaml.const import CONF_LAMBDA, CONF_MAKE_ID, CONF_NAME, CONF_TURN_OFF_ACTION, \
+    CONF_TURN_ON_ACTION
+from esphomeyaml.helpers import App, Application, process_lambda, variable, NoArg, add
+
+PLATFORM_SCHEMA = switch.PLATFORM_SCHEMA.extend({
+    cv.GenerateID('template_switch', CONF_MAKE_ID): cv.register_variable_id,
+    vol.Required(CONF_LAMBDA): cv.lambda_,
+    vol.Optional(CONF_TURN_OFF_ACTION): automation.ACTIONS_SCHEMA,
+    vol.Optional(CONF_TURN_ON_ACTION): automation.ACTIONS_SCHEMA,
+}).extend(switch.SWITCH_SCHEMA.schema)
+
+MakeTemplateSwitch = Application.MakeTemplateSwitch
+
+
+def to_code(config):
+    template_ = process_lambda(config[CONF_LAMBDA], [])
+    rhs = App.make_template_switch(config[CONF_NAME], template_)
+    make = variable(MakeTemplateSwitch, config[CONF_MAKE_ID], rhs)
+
+    if CONF_TURN_OFF_ACTION in config:
+        actions = automation.build_actions(config[CONF_TURN_OFF_ACTION], NoArg)
+        add(make.Ptemplate_.add_turn_off_actions(actions))
+    if CONF_TURN_ON_ACTION in config:
+        actions = automation.build_actions(config[CONF_TURN_ON_ACTION], NoArg)
+        add(make.Ptemplate_.add_turn_on_actions(actions))
+
+    switch.setup_switch(make.Ptemplate_, make.Pmqtt, config)
+
+
+BUILD_FLAGS = '-DUSE_TEMPLATE_SWITCH'
diff --git a/esphomeyaml/components/web_server.py b/esphomeyaml/components/web_server.py
index 54b1c54fe..9a6eaef39 100644
--- a/esphomeyaml/components/web_server.py
+++ b/esphomeyaml/components/web_server.py
@@ -5,7 +5,7 @@ import voluptuous as vol
 import esphomeyaml.config_validation as cv
 from esphomeyaml import core
 from esphomeyaml.const import CONF_PORT, CONF_JS_URL, CONF_CSS_URL, CONF_ID, ESP_PLATFORM_ESP32
-from esphomeyaml.helpers import App, add, Pvariable
+from esphomeyaml.helpers import App, add, Pvariable, esphomelib_ns
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -16,10 +16,12 @@ CONFIG_SCHEMA = vol.Schema({
     vol.Optional(CONF_JS_URL): vol.Url,
 })
 
+WebServer = esphomelib_ns.WebServer
+
 
 def to_code(config):
     rhs = App.init_web_server(config.get(CONF_PORT))
-    web_server = Pvariable('WebServer', config[CONF_ID], rhs)
+    web_server = Pvariable(WebServer, config[CONF_ID], rhs)
     if CONF_CSS_URL in config:
         add(web_server.set_css_url(config[CONF_CSS_URL]))
     if CONF_JS_URL in config:
diff --git a/esphomeyaml/components/wifi.py b/esphomeyaml/components/wifi.py
index f58ffcdbb..c1d09010f 100644
--- a/esphomeyaml/components/wifi.py
+++ b/esphomeyaml/components/wifi.py
@@ -5,7 +5,7 @@ from esphomeyaml import core
 from esphomeyaml.const import CONF_AP, CONF_CHANNEL, CONF_DNS1, CONF_DNS2, CONF_GATEWAY, \
     CONF_HOSTNAME, CONF_ID, CONF_MANUAL_IP, CONF_PASSWORD, CONF_SSID, CONF_STATIC_IP, CONF_SUBNET, \
     ESP_PLATFORM_ESP8266
-from esphomeyaml.helpers import App, MockObj, Pvariable, StructInitializer, add
+from esphomeyaml.helpers import App, Pvariable, StructInitializer, add, esphomelib_ns, global_ns
 
 
 def validate_password(value):
@@ -45,7 +45,9 @@ CONFIG_SCHEMA = vol.Schema({
 })
 
 # pylint: disable=invalid-name
-IPAddress = MockObj('IPAddress')
+IPAddress = global_ns.IPAddress
+ManualIP = esphomelib_ns.ManualIP
+WiFiComponent = esphomelib_ns.WiFiComponent
 
 
 def safe_ip(ip):
@@ -56,7 +58,7 @@ def safe_ip(ip):
 
 def manual_ip(config):
     return StructInitializer(
-        'ManualIP',
+        ManualIP,
         ('static_ip', safe_ip(config[CONF_STATIC_IP])),
         ('gateway', safe_ip(config[CONF_GATEWAY])),
         ('subnet', safe_ip(config[CONF_SUBNET])),
@@ -72,7 +74,7 @@ def to_code(config):
         rhs = App.init_wifi(config[CONF_SSID], config.get(CONF_PASSWORD))
     else:
         rhs = App.init_wifi()
-    wifi = Pvariable('WiFiComponent', config[CONF_ID], rhs)
+    wifi = Pvariable(WiFiComponent, config[CONF_ID], rhs)
 
     if sta and CONF_MANUAL_IP in config:
         add(wifi.set_sta_manual_ip(manual_ip(config[CONF_MANUAL_IP])))
diff --git a/esphomeyaml/config.py b/esphomeyaml/config.py
index 2ae7be69d..8c503453d 100644
--- a/esphomeyaml/config.py
+++ b/esphomeyaml/config.py
@@ -29,7 +29,7 @@ CORE_SCHEMA = vol.Schema({
     vol.Optional(CONF_LIBRARY_URI, default=DEFAULT_LIBRARY_URI): cv.string,
     vol.Optional(CONF_SIMPLIFY, default=True): cv.boolean,
     vol.Optional(CONF_USE_BUILD_FLAGS, default=True): cv.boolean,
-    vol.Optional(CONF_BOARD_FLASH_MODE): vol.All(vol.Lower, vol.Any(*BUILD_FLASH_MODES)),
+    vol.Optional(CONF_BOARD_FLASH_MODE): vol.All(vol.Lower, cv.one_of(*BUILD_FLASH_MODES)),
 })
 
 REQUIRED_COMPONENTS = [
@@ -171,6 +171,12 @@ def validate_config(config):
             if not success:
                 continue
 
+            esp_platforms = getattr(platform, 'ESP_PLATFORMS', ESP_PLATFORMS)
+            if core.ESP_PLATFORM not in esp_platforms:
+                result.add_error(
+                    u"Platform {}.{} doesn't support {}.".format(domain, p_name, core.ESP_PLATFORM))
+                continue
+
             if hasattr(platform, u'PLATFORM_SCHEMA'):
                 try:
                     p_validated = platform.PLATFORM_SCHEMA(p_config)
diff --git a/esphomeyaml/config_validation.py b/esphomeyaml/config_validation.py
index 455a5e125..d036391b1 100644
--- a/esphomeyaml/config_validation.py
+++ b/esphomeyaml/config_validation.py
@@ -12,8 +12,8 @@ from esphomeyaml.const import CONF_AVAILABILITY, CONF_COMMAND_TOPIC, CONF_DISCOV
     CONF_NAME, CONF_PAYLOAD_AVAILABLE, \
     CONF_PAYLOAD_NOT_AVAILABLE, CONF_PLATFORM, CONF_RETAIN, CONF_STATE_TOPIC, CONF_TOPIC, \
     ESP_PLATFORM_ESP32, ESP_PLATFORM_ESP8266
-from esphomeyaml.core import HexInt, IPAddress, TimePeriod, TimePeriodMilliseconds, \
-    TimePeriodMicroseconds, TimePeriodSeconds
+from esphomeyaml.core import HexInt, IPAddress, TimePeriod, TimePeriodMicroseconds, \
+    TimePeriodMilliseconds, TimePeriodSeconds, Lambda
 from esphomeyaml.helpers import ensure_unique_string
 
 _LOGGER = logging.getLogger(__name__)
@@ -134,7 +134,7 @@ def int_(value):
 
 
 hex_int = vol.Coerce(hex_int_)
-match_cpp_var_ = vol.Match(r'^[a-zA-Z_][a-zA-Z0-9_]+$', msg=u"Must be a valid C++ variable name")
+match_cpp_var_ = vol.Match(r'^[a-zA-Z_][a-zA-Z0-9_]*$', msg=u"Must be a valid C++ variable name")
 
 
 def variable_id(value):
@@ -144,6 +144,14 @@ def variable_id(value):
     return value
 
 
+def templatable(other_validators):
+    def validator(value):
+        if isinstance(value, Lambda):
+            return value
+        return other_validators(value)
+    return validator
+
+
 def only_on(platforms):
     if not isinstance(platforms, list):
         platforms = [platforms]
@@ -170,10 +178,24 @@ def has_at_least_one_key(*keys):
         if not isinstance(obj, dict):
             raise vol.Invalid('expected dictionary')
 
-        for k in obj.keys():
-            if k in keys:
-                return obj
-        raise vol.Invalid('must contain one of {}.'.format(', '.join(keys)))
+        if not any(k in keys for k in obj):
+            raise vol.Invalid('Must contain at least one of {}.'.format(', '.join(keys)))
+        return obj
+
+    return validate
+
+
+def has_at_exactly_one_key(*keys):
+    def validate(obj):
+        if not isinstance(obj, dict):
+            raise vol.Invalid('expected dictionary')
+
+        number = sum(k in keys for k in obj)
+        if number > 1:
+            raise vol.Invalid("Cannot specify more than one of {}.".format(', '.join(keys)))
+        if number < 1:
+            raise vol.Invalid('Must contain exactly one of {}.'.format(', '.join(keys)))
+        return obj
 
     return validate
 
@@ -410,6 +432,14 @@ def mqtt_payload(value):
     return string(value)
 
 
+def mqtt_qos(value):
+    try:
+        value = int(value)
+    except (TypeError, ValueError):
+        raise vol.Invalid(u"MQTT Quality of Service must be integer, got {}".format(value))
+    return one_of(0, 1, 2)(value)
+
+
 uint8_t = vol.All(int_, vol.Range(min=0, max=255))
 uint16_t = vol.All(int_, vol.Range(min=0, max=65535))
 uint32_t = vol.All(int_, vol.Range(min=0, max=4294967295))
@@ -429,6 +459,22 @@ def valid(value):
     return value
 
 
+def one_of(*values):
+    options = u', '.join(u"'{}'".format(x) for x in values)
+
+    def validator(value):
+        if value not in values:
+            raise vol.Invalid(u"Unknown value '{}', must be one of {}".format(value, options))
+        return value
+    return validator
+
+
+def lambda_(value):
+    if isinstance(value, Lambda):
+        return value
+    return Lambda(string_strict(value))
+
+
 REGISTERED_IDS = set()
 
 
diff --git a/esphomeyaml/const.py b/esphomeyaml/const.py
index 9aa378c7f..685019b08 100644
--- a/esphomeyaml/const.py
+++ b/esphomeyaml/const.py
@@ -34,6 +34,13 @@ CONF_USERNAME = 'username'
 CONF_POWER_SUPPLY = 'power_supply'
 CONF_ID = 'id'
 CONF_MQTT_ID = 'mqtt_id'
+CONF_SENSOR_ID = 'sensor_id'
+CONF_TRIGGER_ID = 'trigger_id'
+CONF_ACTION_ID = 'action_id'
+CONF_CONDITION_ID = 'condition_id'
+CONF_MAKE_ID = 'make_id'
+CONF_AUTOMATION_ID = 'automation_id'
+CONF_DELAY = 'delay'
 CONF_PIN = 'pin'
 CONF_NUMBER = 'number'
 CONF_INVERTED = 'inverted'
@@ -70,6 +77,15 @@ CONF_TOPIC = 'topic'
 CONF_PAYLOAD_AVAILABLE = 'payload_available'
 CONF_PAYLOAD_NOT_AVAILABLE = 'payload_not_available'
 CONF_DEFAULT_TRANSITION_LENGTH = 'default_transition_length'
+CONF_TRANSITION_LENGTH = 'transition_length'
+CONF_FLASH_LENGTH = 'flash_length'
+CONF_BRIGHTNESS = 'brightness'
+CONF_EFFECT = 'effect'
+CONF_MIN = 'min'
+CONF_MAX = 'max'
+CONF_ON = 'on'
+CONF_IF = 'if'
+CONF_THEN = 'then'
 CONF_BINARY = 'binary'
 CONF_WHITE = 'white'
 CONF_RGBW = 'rgbw'
@@ -112,6 +128,8 @@ CONF_LAMBDA = 'lambda'
 CONF_THROTTLE = 'throttle'
 CONF_DELTA = 'delta'
 CONF_OR = 'or'
+CONF_AND = 'and'
+CONF_RANGE = 'range'
 CONF_UNIQUE = 'unique'
 CONF_HEARTBEAT = 'heartbeat'
 CONF_DEBOUNCE = 'debounce'
@@ -192,6 +210,24 @@ CONF_CLOCK_PIN = 'clock_pin'
 CONF_RGB_ORDER = 'rgb_order'
 CONF_ACCURACY = 'accuracy'
 CONF_BOARD_FLASH_MODE = 'board_flash_mode'
+CONF_ON_PRESS = 'on_press'
+CONF_ON_RELEASE = 'on_release'
+CONF_ON_CLICK = 'on_click'
+CONF_ON_DOUBLE_CLICK = 'on_double_click'
+CONF_MIN_LENGTH = 'min_length'
+CONF_MAX_LENGTH = 'max_length'
+CONF_ON_VALUE = 'on_value'
+CONF_ON_RAW_VALUE = 'on_raw_value'
+CONF_ON_VALUE_RANGE = 'on_value_range'
+CONF_ON_MESSAGE = 'on_message'
+CONF_PIN_CS = 'pin_cs'
+CONF_PIN_CLOCK = 'pin_clock'
+CONF_PIN_MISO = 'pin_miso'
+CONF_TURN_ON_ACTION = 'turn_on_action'
+CONF_TURN_OFF_ACTION = 'turn_off_action'
+CONF_OPEN_ACTION = 'open_action'
+CONF_CLOSE_ACTION = 'close_action'
+CONF_STOP_ACTION = 'stop_action'
 
 ESP32_BOARDS = [
     'featheresp32', 'node32s', 'espea32', 'firebeetle32', 'esp32doit-devkit-v1',
diff --git a/esphomeyaml/core.py b/esphomeyaml/core.py
index 2475e5b09..fc5860237 100644
--- a/esphomeyaml/core.py
+++ b/esphomeyaml/core.py
@@ -171,6 +171,14 @@ class TimePeriodSeconds(TimePeriod):
     pass
 
 
+class Lambda(object):
+    def __init__(self, value):
+        self.value = value
+
+    def __str__(self):
+        return u'Lambda<{}>'.format(self.value)
+
+
 CONFIG_PATH = None
 SIMPLIFY = True
 ESP_PLATFORM = ''
diff --git a/esphomeyaml/helpers.py b/esphomeyaml/helpers.py
index fa11b4073..ff40e0572 100644
--- a/esphomeyaml/helpers.py
+++ b/esphomeyaml/helpers.py
@@ -10,7 +10,7 @@ from esphomeyaml.const import CONF_AVAILABILITY, CONF_COMMAND_TOPIC, CONF_DISCOV
     CONF_MODE, CONF_NUMBER, CONF_PAYLOAD_AVAILABLE, CONF_PAYLOAD_NOT_AVAILABLE, CONF_PCF8574, \
     CONF_RETAIN, CONF_STATE_TOPIC, CONF_TOPIC
 from esphomeyaml.core import ESPHomeYAMLError, HexInt, TimePeriodMicroseconds, \
-    TimePeriodMilliseconds, TimePeriodSeconds
+    TimePeriodMilliseconds, TimePeriodSeconds, Lambda
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -58,6 +58,9 @@ class Expression(object):
                 continue
             require.require()
 
+    def has_side_effects(self):
+        return self.required
+
 
 class RawExpression(Expression):
     def __init__(self, text):
@@ -65,7 +68,7 @@ class RawExpression(Expression):
         self.text = text
 
     def __str__(self):
-        return self.text
+        return str(self.text)
 
 
 # pylint: disable=redefined-builtin
@@ -85,6 +88,9 @@ class AssignmentExpression(Expression):
             type_ = u'auto'
         return u"{} {}{} = {}".format(type_, self.modifier, self.name, self.rhs)
 
+    def has_side_effects(self):
+        return self.rhs.has_side_effects()
+
 
 class ExpressionList(Expression):
     def __init__(self, *args):
@@ -100,7 +106,7 @@ class ExpressionList(Expression):
             self.args.append(exp)
 
     def __str__(self):
-        text = u", ".join(unicode(x) for x in self.args)
+        text = u", ".join(str(x) for x in self.args)
         return indent_all_but_first_and_last(text)
 
 
@@ -137,6 +143,8 @@ class StructInitializer(Expression):
     def __init__(self, base, *args):
         super(StructInitializer, self).__init__()
         self.base = base
+        if isinstance(base, Expression):
+            self.requires.append(base)
         if not isinstance(args, OrderedDict):
             args = OrderedDict(args)
         self.args = OrderedDict()
@@ -180,6 +188,57 @@ class ArrayInitializer(Expression):
         return cpp
 
 
+# pylint: disable=invalid-name
+class ParameterExpression(Expression):
+    def __init__(self, type, id):
+        super(ParameterExpression, self).__init__()
+        self.type = type
+        self.id = id
+
+    def __str__(self):
+        return u"{} {}".format(self.type, self.id)
+
+
+class ParameterListExpression(Expression):
+    def __init__(self, *parameters):
+        super(ParameterListExpression, self).__init__()
+        self.parameters = []
+        for parameter in parameters:
+            if not isinstance(parameter, ParameterExpression):
+                parameter = ParameterExpression(*parameter)
+            self.parameters.append(parameter)
+            self.requires.append(parameter)
+
+    def __str__(self):
+        return u", ".join(unicode(x) for x in self.parameters)
+
+
+class LambdaExpression(Expression):
+    def __init__(self, parts, parameters, capture='=', return_type=None):
+        super(LambdaExpression, self).__init__()
+        self.parts = parts
+        if not isinstance(parameters, ParameterListExpression):
+            parameters = ParameterListExpression(*parameters)
+        self.parameters = parameters
+        self.requires.append(self.parameters)
+        self.capture = capture
+        self.return_type = return_type
+        if return_type is not None:
+            self.requires.append(return_type)
+        for i in range(1, len(parts), 2):
+            self.requires.append(parts[i])
+
+    def __str__(self):
+        cpp = u'[{}]({})'.format(self.capture, self.parameters)
+        if self.return_type is not None:
+            cpp += u' -> {}'.format(self.return_type)
+        cpp += u' {\n'
+        for part in self.parts:
+            cpp += unicode(part)
+        cpp += u'\n}'
+        return indent_all_but_first_and_last(cpp)
+
+
 class Literal(Expression):
     def __str__(self):
         raise NotImplementedError
@@ -235,9 +294,9 @@ class HexIntLiteral(Literal):
 
 
 class FloatLiteral(Literal):
-    def __init__(self, float_):
+    def __init__(self, value):
         super(FloatLiteral, self).__init__()
-        self.float_ = float_
+        self.float_ = value
 
     def __str__(self):
         return u"{:f}f".format(self.float_)
@@ -297,23 +356,30 @@ def statement(expression):
     return ExpressionStatement(expression)
 
 
+def register_variable(type, id, obj):
+    _VARIABLES[id] = obj, type
+
+
 # pylint: disable=redefined-builtin, invalid-name
 def variable(type, id, rhs):
     rhs = safe_exp(rhs)
     obj = MockObj(id, u'.')
     assignment = AssignmentExpression(type, '', id, rhs, obj)
     add(assignment)
-    _VARIABLES[id] = obj, type
+    register_variable(type, id, obj)
     obj.requires.append(assignment)
     return obj
 
 
-def Pvariable(type, id, rhs):
+def Pvariable(type, id, rhs, has_side_effects=True):
     rhs = safe_exp(rhs)
-    obj = MockObj(id, u'->')
+    if not has_side_effects and hasattr(rhs, '_has_side_effects'):
+        # pylint: disable=attribute-defined-outside-init, protected-access
+        rhs._has_side_effects = False
+    obj = MockObj(id, u'->', has_side_effects=has_side_effects)
     assignment = AssignmentExpression(type, '*', id, rhs, obj)
     add(assignment)
-    _VARIABLES[id] = obj, type
+    register_variable(type, id, obj)
     obj.requires.append(assignment)
     return obj
 
@@ -324,32 +390,41 @@ _EXPRESSIONS = []
 
 
 def get_variable(id, type=None):
-    result = None
-    while _QUEUE:
+    def get_result():
         if id is not None:
             if id in _VARIABLES:
-                result = _VARIABLES[id][0]
-                break
+                return _VARIABLES[id][0]
         elif type is not None:
-            result = next((x[0] for x in _VARIABLES.itervalues() if x[1] == type), None)
-            if result is not None:
-                break
+            return next((x[0] for x in _VARIABLES.itervalues() if x[1] == type), None)
+        return None
+
+    while _QUEUE:
+        result = get_result()
+        if result is not None:
+            return result
         func, config = _QUEUE.popleft()
         func(config)
     if id is None and type is None:
         return None
+    result = get_result()
     if result is None:
-        if id is not None:
-            if id in _VARIABLES:
-                result = _VARIABLES[id][0]
-        elif type is not None:
-            result = next((x[0] for x in _VARIABLES.itervalues() if x[1] == type), None)
-
-        if result is None:
-            raise ESPHomeYAMLError(u"Couldn't find ID '{}' with type {}".format(id, type))
+        raise ESPHomeYAMLError(u"Couldn't find ID '{}' with type {}".format(id, type))
     return result
 
 
+def process_lambda(value, parameters, capture='=', return_type=None):
+    parts = re.split(r'id\(\s*([a-zA-Z_][a-zA-Z0-9_]*)\s*\)\.', value.value)
+    for i in range(1, len(parts), 2):
+        parts[i] = get_variable(parts[i])._
+    return LambdaExpression(parts, parameters, capture, return_type)
+
+
+def templatable(value, input_type, output_type):
+    if isinstance(value, Lambda):
+        return process_lambda(value, [(input_type, 'x')], return_type=output_type)
+    return value
+
+
 def add_task(func, config):
     _QUEUE.append((func, config))
 
@@ -362,18 +437,28 @@ def add(expression, require=True):
 
 
 class MockObj(Expression):
-    def __init__(self, base, op=u'.'):
+    def __init__(self, base, op=u'.', has_side_effects=True):
         self.base = base
         self.op = op
+        self._has_side_effects = has_side_effects
         super(MockObj, self).__init__()
 
     def __getattr__(self, attr):
+        if attr == u'_':
+            obj = MockObj(u'{}{}'.format(self.base, self.op))
+            obj.requires.append(self)
+            return obj
+        if attr == u'new':
+            obj = MockObj(u'new {}'.format(self.base), u'->')
+            obj.requires.append(self)
+            return obj
         next_op = u'.'
-        if attr.startswith(u'P'):
+        if attr.startswith(u'P') and self.op != '::':
             attr = attr[1:]
             next_op = u'->'
-        op = self.op
-        obj = MockObj(u'{}{}{}'.format(self.base, op, attr), next_op)
+        if attr.startswith(u'_'):
+            attr = attr[1:]
+        obj = MockObj(u'{}{}{}'.format(self.base, self.op, attr), next_op)
         obj.requires.append(self)
         return obj
 
@@ -394,12 +479,41 @@ class MockObj(Expression):
                 continue
             require.require()
 
+    def template(self, args):
+        if not isinstance(args, TemplateArguments):
+            args = TemplateArguments(args)
+        obj = MockObj(u'{}{}'.format(self.base, args))
+        obj.requires.append(self)
+        obj.requires.append(args)
+        return obj
 
-App = MockObj(u'App')
+    def namespace(self, name):
+        obj = MockObj(u'{}{}{}'.format(self.base, self.op, name), u'::')
+        obj.requires.append(self)
+        return obj
 
-GPIOPin = MockObj(u'GPIOPin')
-GPIOOutputPin = MockObj(u'GPIOOutputPin')
-GPIOInputPin = MockObj(u'GPIOInputPin')
+    def has_side_effects(self):
+        return self._has_side_effects
+
+
+global_ns = MockObj('', '')
+float_ = global_ns.namespace('float')
+bool_ = global_ns.namespace('bool')
+std_ns = global_ns.namespace('std')
+std_string = std_ns.string
+uint8 = global_ns.namespace('uint8_t')
+uint16 = global_ns.namespace('uint16_t')
+uint32 = global_ns.namespace('uint32_t')
+NAN = global_ns.namespace('NAN')
+esphomelib_ns = global_ns  # using namespace esphomelib;
+NoArg = esphomelib_ns.NoArg
+App = esphomelib_ns.App
+Application = esphomelib_ns.namespace('Application')
+optional = esphomelib_ns.optional
+
+GPIOPin = esphomelib_ns.GPIOPin
+GPIOOutputPin = esphomelib_ns.GPIOOutputPin
+GPIOInputPin = esphomelib_ns.GPIOInputPin
 
 
 def get_gpio_pin_number(conf):
@@ -453,15 +567,6 @@ def setup_mqtt_component(obj, config):
                                  availability[CONF_PAYLOAD_NOT_AVAILABLE]))
 
 
-def exp_empty_optional(type):
-    return RawExpression(u'Optional<{}>()'.format(type))
-
-
-def exp_optional(type, value):
-    if value is None:
-        return exp_empty_optional(type)
-    return value
-
 
 # shlex's quote for Python 2.7
 _find_unsafe = re.compile(r'[^\w@%+=:,./-]').search
diff --git a/esphomeyaml/pins.py b/esphomeyaml/pins.py
index 9ebd04144..5709fa6b6 100644
--- a/esphomeyaml/pins.py
+++ b/esphomeyaml/pins.py
@@ -64,7 +64,8 @@ ESP32_BOARD_TO_PINS = {
 
 def _translate_pin(value):
     if isinstance(value, dict) or value is None:
-        raise vol.Invalid(u"This option doesn't allow more complicated options like inverted.")
+        raise vol.Invalid(u"This variable only supports pin numbers, not full pin schemas "
+                          u"(with inverted and mode).")
     if isinstance(value, int):
         return value
     try:
@@ -171,9 +172,9 @@ PIN_MODES_ESP32 = [
 def pin_mode(value):
     value = vol.All(vol.Coerce(str), vol.Upper)(value)
     if core.ESP_PLATFORM == ESP_PLATFORM_ESP32:
-        return vol.Any(*PIN_MODES_ESP32)(value)
+        return cv.one_of(*PIN_MODES_ESP32)(value)
     elif core.ESP_PLATFORM == ESP_PLATFORM_ESP8266:
-        return vol.Any(*PIN_MODES_ESP8266)(value)
+        return cv.one_of(*PIN_MODES_ESP8266)(value)
     raise vol.Invalid(u"Invalid ESP platform.")
 
 
diff --git a/esphomeyaml/yaml_util.py b/esphomeyaml/yaml_util.py
index c949f4d3a..0707565bf 100644
--- a/esphomeyaml/yaml_util.py
+++ b/esphomeyaml/yaml_util.py
@@ -8,8 +8,7 @@ from collections import OrderedDict
 
 import yaml
 
-from esphomeyaml.core import ESPHomeYAMLError, HexInt, IPAddress, MACAddress, TimePeriod, \
-    TimePeriodMicroseconds, TimePeriodMilliseconds, TimePeriodSeconds
+from esphomeyaml.core import ESPHomeYAMLError, HexInt, IPAddress, Lambda, MACAddress, TimePeriod
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -195,6 +194,10 @@ def _secret_yaml(loader, node):
     return secrets[node.value]
 
 
+def _lambda(loader, node):
+    return Lambda(unicode(node.value))
+
+
 yaml.SafeLoader.add_constructor(yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG, _ordered_dict)
 yaml.SafeLoader.add_constructor(yaml.resolver.BaseResolver.DEFAULT_SEQUENCE_TAG, _construct_seq)
 yaml.SafeLoader.add_constructor('!env_var', _env_var_yaml)
@@ -206,6 +209,7 @@ yaml.SafeLoader.add_constructor('!include_dir_merge_list',
 yaml.SafeLoader.add_constructor('!include_dir_named', _include_dir_named_yaml)
 yaml.SafeLoader.add_constructor('!include_dir_merge_named',
                                 _include_dir_merge_named_yaml)
+yaml.SafeLoader.add_constructor('!lambda', _lambda)
 
 
 # From: https://gist.github.com/miracle2k/3184458
@@ -270,6 +274,11 @@ def represent_time_period(dumper, data):
     return represent_odict(dumper, 'tag:yaml.org,2002:map', dictionary)
 
 
+def represent_lambda(_, data):
+    node = yaml.ScalarNode(tag='!lambda', value=data.value, style='>')
+    return node
+
+
 yaml.SafeDumper.add_representer(
     OrderedDict,
     lambda dumper, value:
@@ -286,7 +295,5 @@ yaml.SafeDumper.add_representer(unicode, unicode_representer)
 yaml.SafeDumper.add_representer(HexInt, hex_int_representer)
 yaml.SafeDumper.add_representer(IPAddress, stringify_representer)
 yaml.SafeDumper.add_representer(MACAddress, stringify_representer)
-yaml.SafeDumper.add_representer(TimePeriod, represent_time_period)
-yaml.SafeDumper.add_representer(TimePeriodMicroseconds, represent_time_period)
-yaml.SafeDumper.add_representer(TimePeriodMilliseconds, represent_time_period)
-yaml.SafeDumper.add_representer(TimePeriodSeconds, represent_time_period)
+yaml.SafeDumper.add_multi_representer(TimePeriod, represent_time_period)
+yaml.SafeDumper.add_multi_representer(Lambda, represent_lambda)
diff --git a/pylintrc b/pylintrc
index ae5f36a83..24b0b0408 100644
--- a/pylintrc
+++ b/pylintrc
@@ -14,6 +14,8 @@ disable=
   too-many-arguments,
   too-many-return-statements,
   duplicate-code,
+  invalid-name,
+  cyclic-import,
 
 
 additional-builtins=