Add simpler Home Assistant configuration for servo control (#1960)

* Add simpler Home Assistant configuration for servo control

Co-authored-by: Michiel Ryvers <demichiel@gmail.com>

components/servo.rst

@@ -14,7 +14,7 @@ interface to the Arduino Servo library.
 
 First, create an :ref:`output component <output>` (here ``esp8266_pwm``) for the pin the
 servo is connected to. Then connect that output to the servo component by assigning an ID.
-Please note the frequency of the output must be around 50Hz, as most servo controllers
+Please note the frequency of the output should be around 50Hz, as most servo controllers
 only operate in this frequency range.
 
 .. note::
@@ -141,46 +141,22 @@ this will make the servo motor stop immediately and disable its active control.
 Home Assistant Configuration
 ----------------------------
 
-This component will not show up in the Home Assistant frontend automatically because Home Assistant
-does not support servos natively (raise this issue in Home Assistant forums to make this a
-higher priority for Home Assistant). You can add this to your Home Assistant configuration to
-be able to control the servo from the frontend.
+The easiest way to control your servo from Home Assistant is to add a ``number`` to your ESPHome 
+configuration. See :ref:`Number <config-number>` for more information.
 
 .. code-block:: yaml
 
-    # Home Assistant configuration
-    input_number:
-      servo_control:
+    number:
+      - platform: template
         name: Servo Control
-        initial: 0
-        min: -100
-        max: 100
+        min_value: -100
+        max_value: 100
         step: 1
-        mode: slider
-
-    automation:
-      - alias: Write Servo Value to ESP
-        trigger:
-          platform: state
-          entity_id: input_number.servo_control
-        action:
-          # Replace livingroom with the name you gave the ESP
-          - service: esphome.livingroom_control_servo
-            data_template:
-              level: '{{ trigger.to_state.state | int }}'
-
-.. code-block:: yaml
-
-    # ESPHome configuration
-    api:
-      services:
-        - service: control_servo
-          variables:
-            level: float
+        set_action:
           then:
             - servo.write:
                 id: my_servo
-                level: !lambda 'return level / 100.0;'
+                level: !lambda 'return x / 100.0;'
 
     servo:
       - platform: ...