diff --git a/esphome/components/api/client.py b/esphome/components/api/client.py
index d8192eb88f..4a3944d33e 100644
--- a/esphome/components/api/client.py
+++ b/esphome/components/api/client.py
@@ -15,7 +15,7 @@ _LOGGER = logging.getLogger(__name__)
 
 async def async_run_logs(config, address):
     conf = config["api"]
-    port: int = conf[CONF_PORT]
+    port: int = int(conf[CONF_PORT])
     password: str = conf[CONF_PASSWORD]
     noise_psk: Optional[str] = None
     if CONF_ENCRYPTION in conf:
diff --git a/esphome/components/dsmr/sensor.py b/esphome/components/dsmr/sensor.py
index 2c05651d67..9d531293e9 100644
--- a/esphome/components/dsmr/sensor.py
+++ b/esphome/components/dsmr/sensor.py
@@ -13,9 +13,13 @@ from esphome.const import (
     STATE_CLASS_NONE,
     STATE_CLASS_TOTAL_INCREASING,
     UNIT_AMPERE,
+    UNIT_CUBIC_METER,
     UNIT_EMPTY,
+    UNIT_KILOWATT,
+    UNIT_KILOWATT_HOURS,
+    UNIT_KILOVOLT_AMPS_REACTIVE_HOURS,
+    UNIT_KILOVOLT_AMPS_REACTIVE,
     UNIT_VOLT,
-    UNIT_WATT,
 )
 from . import Dsmr, CONF_DSMR_ID
 
@@ -26,40 +30,80 @@ CONFIG_SCHEMA = cv.Schema(
     {
         cv.GenerateID(CONF_DSMR_ID): cv.use_id(Dsmr),
         cv.Optional("energy_delivered_lux"): sensor.sensor_schema(
-            "kWh", ICON_EMPTY, 3, DEVICE_CLASS_ENERGY, STATE_CLASS_TOTAL_INCREASING
+            UNIT_KILOWATT_HOURS,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_ENERGY,
+            STATE_CLASS_TOTAL_INCREASING,
         ),
         cv.Optional("energy_delivered_tariff1"): sensor.sensor_schema(
-            "kWh", ICON_EMPTY, 3, DEVICE_CLASS_ENERGY, STATE_CLASS_TOTAL_INCREASING
+            UNIT_KILOWATT_HOURS,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_ENERGY,
+            STATE_CLASS_TOTAL_INCREASING,
         ),
         cv.Optional("energy_delivered_tariff2"): sensor.sensor_schema(
-            "kWh", ICON_EMPTY, 3, DEVICE_CLASS_ENERGY, STATE_CLASS_TOTAL_INCREASING
+            UNIT_KILOWATT_HOURS,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_ENERGY,
+            STATE_CLASS_TOTAL_INCREASING,
         ),
         cv.Optional("energy_returned_lux"): sensor.sensor_schema(
-            "kWh", ICON_EMPTY, 3, DEVICE_CLASS_ENERGY, STATE_CLASS_TOTAL_INCREASING
+            UNIT_KILOWATT_HOURS,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_ENERGY,
+            STATE_CLASS_TOTAL_INCREASING,
         ),
         cv.Optional("energy_returned_tariff1"): sensor.sensor_schema(
-            "kWh", ICON_EMPTY, 3, DEVICE_CLASS_ENERGY, STATE_CLASS_TOTAL_INCREASING
+            UNIT_KILOWATT_HOURS,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_ENERGY,
+            STATE_CLASS_TOTAL_INCREASING,
         ),
         cv.Optional("energy_returned_tariff2"): sensor.sensor_schema(
-            "kWh", ICON_EMPTY, 3, DEVICE_CLASS_ENERGY, STATE_CLASS_TOTAL_INCREASING
+            UNIT_KILOWATT_HOURS,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_ENERGY,
+            STATE_CLASS_TOTAL_INCREASING,
         ),
         cv.Optional("total_imported_energy"): sensor.sensor_schema(
-            "kvarh", ICON_EMPTY, 3, DEVICE_CLASS_ENERGY, STATE_CLASS_NONE
+            UNIT_KILOVOLT_AMPS_REACTIVE_HOURS,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_ENERGY,
+            STATE_CLASS_NONE,
         ),
         cv.Optional("total_exported_energy"): sensor.sensor_schema(
-            "kvarh", ICON_EMPTY, 3, DEVICE_CLASS_ENERGY, STATE_CLASS_NONE
+            UNIT_KILOVOLT_AMPS_REACTIVE_HOURS,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_ENERGY,
+            STATE_CLASS_NONE,
         ),
         cv.Optional("power_delivered"): sensor.sensor_schema(
-            UNIT_WATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
+            UNIT_KILOWATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
         ),
         cv.Optional("power_returned"): sensor.sensor_schema(
-            UNIT_WATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
+            UNIT_KILOWATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
         ),
         cv.Optional("reactive_power_delivered"): sensor.sensor_schema(
-            "kvar", ICON_EMPTY, 3, DEVICE_CLASS_ENERGY, STATE_CLASS_NONE
+            UNIT_KILOVOLT_AMPS_REACTIVE,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_POWER,
+            STATE_CLASS_MEASUREMENT,
         ),
         cv.Optional("reactive_power_returned"): sensor.sensor_schema(
-            "kvar", ICON_EMPTY, 3, DEVICE_CLASS_ENERGY, STATE_CLASS_MEASUREMENT
+            UNIT_KILOVOLT_AMPS_REACTIVE,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_POWER,
+            STATE_CLASS_MEASUREMENT,
         ),
         cv.Optional("electricity_threshold"): sensor.sensor_schema(
             UNIT_EMPTY, ICON_EMPTY, 3, DEVICE_CLASS_EMPTY, STATE_CLASS_NONE
@@ -77,13 +121,13 @@ CONFIG_SCHEMA = cv.Schema(
             UNIT_EMPTY, ICON_EMPTY, 0, DEVICE_CLASS_EMPTY, STATE_CLASS_NONE
         ),
         cv.Optional("electricity_sags_l2"): sensor.sensor_schema(
-            UNIT_EMPTY, ICON_EMPTY, 0, DEVICE_CLASS_EMPTY, STATE_CLASS_MEASUREMENT
+            UNIT_EMPTY, ICON_EMPTY, 0, DEVICE_CLASS_EMPTY, STATE_CLASS_NONE
         ),
         cv.Optional("electricity_sags_l3"): sensor.sensor_schema(
             UNIT_EMPTY, ICON_EMPTY, 0, DEVICE_CLASS_EMPTY, STATE_CLASS_NONE
         ),
         cv.Optional("electricity_swells_l1"): sensor.sensor_schema(
-            UNIT_EMPTY, ICON_EMPTY, 0, DEVICE_CLASS_EMPTY, STATE_CLASS_MEASUREMENT
+            UNIT_EMPTY, ICON_EMPTY, 0, DEVICE_CLASS_EMPTY, STATE_CLASS_NONE
         ),
         cv.Optional("electricity_swells_l2"): sensor.sensor_schema(
             UNIT_EMPTY, ICON_EMPTY, 0, DEVICE_CLASS_EMPTY, STATE_CLASS_NONE
@@ -101,40 +145,64 @@ CONFIG_SCHEMA = cv.Schema(
             UNIT_AMPERE, ICON_EMPTY, 1, DEVICE_CLASS_CURRENT, STATE_CLASS_MEASUREMENT
         ),
         cv.Optional("power_delivered_l1"): sensor.sensor_schema(
-            UNIT_WATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
+            UNIT_KILOWATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
         ),
         cv.Optional("power_delivered_l2"): sensor.sensor_schema(
-            UNIT_WATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
+            UNIT_KILOWATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
         ),
         cv.Optional("power_delivered_l3"): sensor.sensor_schema(
-            UNIT_WATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
+            UNIT_KILOWATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
         ),
         cv.Optional("power_returned_l1"): sensor.sensor_schema(
-            UNIT_WATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
+            UNIT_KILOWATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
         ),
         cv.Optional("power_returned_l2"): sensor.sensor_schema(
-            UNIT_WATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
+            UNIT_KILOWATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
         ),
         cv.Optional("power_returned_l3"): sensor.sensor_schema(
-            UNIT_WATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
+            UNIT_KILOWATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
         ),
         cv.Optional("reactive_power_delivered_l1"): sensor.sensor_schema(
-            UNIT_WATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
+            UNIT_KILOVOLT_AMPS_REACTIVE,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_POWER,
+            STATE_CLASS_MEASUREMENT,
         ),
         cv.Optional("reactive_power_delivered_l2"): sensor.sensor_schema(
-            UNIT_WATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
+            UNIT_KILOVOLT_AMPS_REACTIVE,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_POWER,
+            STATE_CLASS_MEASUREMENT,
         ),
         cv.Optional("reactive_power_delivered_l3"): sensor.sensor_schema(
-            UNIT_WATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
+            UNIT_KILOVOLT_AMPS_REACTIVE,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_POWER,
+            STATE_CLASS_MEASUREMENT,
         ),
         cv.Optional("reactive_power_returned_l1"): sensor.sensor_schema(
-            UNIT_WATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
+            UNIT_KILOVOLT_AMPS_REACTIVE,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_POWER,
+            STATE_CLASS_MEASUREMENT,
         ),
         cv.Optional("reactive_power_returned_l2"): sensor.sensor_schema(
-            UNIT_WATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
+            UNIT_KILOVOLT_AMPS_REACTIVE,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_POWER,
+            STATE_CLASS_MEASUREMENT,
         ),
         cv.Optional("reactive_power_returned_l3"): sensor.sensor_schema(
-            UNIT_WATT, ICON_EMPTY, 3, DEVICE_CLASS_POWER, STATE_CLASS_MEASUREMENT
+            UNIT_KILOVOLT_AMPS_REACTIVE,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_POWER,
+            STATE_CLASS_MEASUREMENT,
         ),
         cv.Optional("voltage_l1"): sensor.sensor_schema(
             UNIT_VOLT, ICON_EMPTY, 1, DEVICE_CLASS_VOLTAGE, STATE_CLASS_NONE
@@ -146,10 +214,18 @@ CONFIG_SCHEMA = cv.Schema(
             UNIT_VOLT, ICON_EMPTY, 1, DEVICE_CLASS_VOLTAGE, STATE_CLASS_NONE
         ),
         cv.Optional("gas_delivered"): sensor.sensor_schema(
-            "m³", ICON_EMPTY, 3, DEVICE_CLASS_GAS, STATE_CLASS_TOTAL_INCREASING
+            UNIT_CUBIC_METER,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_GAS,
+            STATE_CLASS_TOTAL_INCREASING,
         ),
         cv.Optional("gas_delivered_be"): sensor.sensor_schema(
-            "m³", ICON_EMPTY, 3, DEVICE_CLASS_GAS, STATE_CLASS_TOTAL_INCREASING
+            UNIT_CUBIC_METER,
+            ICON_EMPTY,
+            3,
+            DEVICE_CLASS_GAS,
+            STATE_CLASS_TOTAL_INCREASING,
         ),
     }
 ).extend(cv.COMPONENT_SCHEMA)
diff --git a/esphome/components/wifi/wifi_component.cpp b/esphome/components/wifi/wifi_component.cpp
index 50feeb6cad..282900260d 100644
--- a/esphome/components/wifi/wifi_component.cpp
+++ b/esphome/components/wifi/wifi_component.cpp
@@ -244,6 +244,8 @@ void WiFiComponent::save_wifi_sta(const std::string &ssid, const std::string &pa
   sta.set_ssid(ssid);
   sta.set_password(password);
   this->set_sta(sta);
+
+  this->start_scanning();
 }
 
 void WiFiComponent::start_connecting(const WiFiAP &ap, bool two) {
diff --git a/esphome/const.py b/esphome/const.py
index c5c08b74d4..2cd6d05da5 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -1,6 +1,6 @@
 """Constants used by esphome."""
 
-__version__ = "2021.9.0b4"
+__version__ = "2021.9.0b5"
 
 ESP_PLATFORM_ESP32 = "ESP32"
 ESP_PLATFORM_ESP8266 = "ESP8266"
@@ -786,7 +786,9 @@ UNIT_KELVIN = "K"
 UNIT_KILOGRAM = "kg"
 UNIT_KILOMETER = "km"
 UNIT_KILOMETER_PER_HOUR = "km/h"
+UNIT_KILOVOLT_AMPS_REACTIVE = "kVAr"
 UNIT_KILOVOLT_AMPS_REACTIVE_HOURS = "kVArh"
+UNIT_KILOWATT = "kW"
 UNIT_KILOWATT_HOURS = "kWh"
 UNIT_LUX = "lx"
 UNIT_METER = "m"
diff --git a/esphome/zeroconf.py b/esphome/zeroconf.py
index 443ed6a33a..e6853531f2 100644
--- a/esphome/zeroconf.py
+++ b/esphome/zeroconf.py
@@ -49,7 +49,7 @@ class HostResolver(RecordUpdateListener):
                     next_ = now + delay
                     delay *= 2
 
-                zc.wait(min(next_, last) - now)
+                time.sleep(min(next_, last) - now)
                 now = time.time()
         finally:
             zc.remove_listener(self)