HA Blueprint: Auto Fan Temperature Control for 3-Speed Fan

AutoFanControl.yaml

blueprint:
  name: Auto Fan Temperature Control for 3-Speed Fan
  author: WillCodeForCats
  description:
    "This sets the fan speed for a 3-speed fan based on aroom temperature
    sensor entity. Any fan entity with 3 speeds will work with this blueprint.

    There are action selectors for both the cycle loop and the shutdown loop for adding
    control of heating / cooling sources, or anything else you want Home Assistant
    to do.

    Based on [SirGoodenough/HA_Blueprints](https://github.com/SirGoodenough/HA_Blueprints/)
    with time-based stuff removed."
  source_url: https://gist.github.com/WillCodeForCats/5c7dc1bb2da594d40e7791372e8dfcb6
  domain: automation
  homeassistant:
    min_version: 2023.3.0
  input:
    fan:
      name: Fan Entity
      description: The Home Assistant Fan entity to control.
      selector:
        entity:
          domain:
            - fan
          multiple: false
    room_temp_now:
      name: Room Temperature Sensor
      description:
        This is a temperature sensor or averaged sensor, within the same
        room as the fan or within the fan airflow.
      selector:
        entity:
          domain:
            - sensor
          multiple: false
    fan_control:
      name: Toggle to turn the auto fan function off for when away or seasonally
      description:
        "```input_boolean``` - If this is set to off, the Automation will
        be disabled.

        This Helper has to be set up in [![Open your Home Assistant instance and show
        your helper entities.](https://my.home-assistant.io/badges/helpers.svg)](https://my.home-assistant.io/redirect/helpers/) "
      selector:
        entity:
          domain:
            - input_boolean
          multiple: false
    room_set_temp:
      name: Room Target Temperature
      description:
        "```input_number``` - This is the target temperature of the room.
        Use the same scale as the temperature sensor.

        This Helper has to be set up in [![Open your Home Assistant instance and show
        your helper entities.](https://my.home-assistant.io/badges/helpers.svg)](https://my.home-assistant.io/redirect/helpers/) "
      selector:
        entity:
          domain:
            - input_number
          multiple: false
    temp_gap:
      name: Temp Hysteresis
      description: "This keeps the fan from speed cycling too often.

        Set it larger if the fan goes on and off too much.

        Set it smaller if the fan doesn't change speeds fast enough."
      default: 1.3
      selector:
        number:
          min: 0.0
          max: 7.0
          unit_of_measurement: Degrees
          mode: slider
          step: 0.1
    temp_gap_1_to_2:
      name: Temp Gap between Low and Medium
      description: "This is the temp swing between Low and Medium.

        If the sensor reads between the base temperature and this number of degrees
        warmer, the fan is on LOW.

        Below the base temperature the fan is off."
      default: 4.5
      selector:
        number:
          min: 1.0
          max: 20.0
          unit_of_measurement: Degrees
          mode: slider
          step: 0.1
    temp_gap_2_to_3:
      name: Temp Gap between Medium and High
      description: "This is the temp change between Medium and High.

        If the sensor reads between the base temperature plus the 1 to 2 temperature
        and this number of degrees warmer, the fan is on MEDIUM.

        Any warmer than this and the fan is set to HIGH."
      default: 2.0
      selector:
        number:
          min: 1.0
          max: 20.0
          unit_of_measurement: Degrees
          mode: slider
          step: 0.1
    loop_action:
      name: User action for fan enabled condition (loop)
      description:
        This can be used to start an A/C unit or other device to turn on.
        It is executed when the fan turns on or changes speeds. Leave this empty to
        do nothing extra.
      default: []
      selector:
        action: {}
    off_action:
      name: User action for fan off condition (off_action)
      description:
        This is can be used to disable an A/C unit or other device to turn
        off. It is executed when the fan turns off. Leave this empty to do nothing
        extra.
      default: []
      selector:
        action: {}
variables:
  temp_gap_var: !input temp_gap
  temp_gap_val: "{{ temp_gap_var | float(1.3) }}"
  temp_gap_1_to_2_var: !input temp_gap_1_to_2
  temp_gap_1_to_2_val: "{{ temp_gap_1_to_2_var | float(4.5) }}"
  temp_gap_2_to_3_var: !input temp_gap_2_to_3
  temp_gap_2_to_3_val: "{{ temp_gap_2_to_3_var | float(2.0) }}"
  room_set_temp_var: !input room_set_temp
  room_set_temp_val:
    "{{ expand(room_set_temp_var)[0].state | float(73.1) - temp_gap_val
    }}"
  room_temp_now_var: !input room_temp_now
  room_temp_now_val:
    "{{ expand(room_temp_now_var)[0].state | float(room_set_temp_val)
    }}"
  my_loop_action: !input loop_action
  my_off_action: !input off_action
mode: restart
trigger:
  - platform: state
    id: go_if_the_control_is_switched_off
    entity_id: !input fan_control
    to: "off"
  - platform: state
    id: go_on_any_sensor_temp_changes
    entity_id: !input room_temp_now
  - platform: state
    id: go_on_any_set_temp_changes
    entity_id: !input room_set_temp
  - platform: state
    id: go_if_the_control_is_switched_on
    entity_id: !input fan_control
    to: "on"
action:
  - choose:
      - alias: Fan normal turn off sequence
        conditions:
          or:
            - alias: The automation has been disabled
              condition: trigger
              id: go_if_the_control_is_switched_off
        sequence:
          - alias: Do something when the fan stop condition triggers
            if: "{{ not my_off_action in ('none', 'null', 'unavailable', '') }}"
            then: !input off_action
          - alias: Stop the fan
            service: fan.turn_off
            target:
              entity_id: !input fan
      - alias: Normal fan run sequence
        conditions:
          and:
            - alias: Make sure the Fan is enabled
              condition: state
              entity_id: !input fan_control
              state: "on"
        sequence:
          - alias: Do something on every fan set speed condition trigger
            if: "{{ not my_loop_action in ('none', 'null', 'unavailable', '') }}"
            then: !input loop_action
          - alias: Set the fan speed based on the sensor temperature
            service: fan.set_percentage
            target:
              entity_id: !input fan
            data:
              percentage:
                "{% if room_temp_now_val < room_set_temp_val %} 0 {% elif room_temp_now_val
                < (room_set_temp_val + temp_gap_1_to_2_val) %} 33 {% elif room_temp_now_val
                < (room_set_temp_val  + temp_gap_1_to_2_val + temp_gap_2_to_3_val) %} 67
                {% else %} 100 {% endif %}"