HA: Auto Fan Speed v2

auto-fan-speed.yaml

mode: restart
blueprint:
  name: Auto fan speed
  description: "Temperature based Auto fan control.\n\n Fan Speed will be set when
    initially turned on by relating the ambient temperature to an equivalant speed
    setting. \nA time delay and a minimum percentage change is used to eliminate 
    frequent speed changes.\n At the minimum temperature setting the fan will turn 
    off. \n When the temperature rises above this minimum temperature setting, the 
    fan will automatically turn back on."
  domain: automation
  input:
    temp_sensor:
      name: 🌡 Temperature Sensor
      description: Enter your temperature sensor. Make sure the temperature sensor is in the units (°C or °F) you want to use for the settings below. 
        If your temp sensor is in °C but you want to use the °F settings, you will need to create a template sensor to convert the sensor into the correct units. 
      default: []
      selector:
        entity:
          domain:
          - sensor
          device_class:
          - temperature
          multiple: false
    fan_switch:
      name: 💨 Fan
      description: The fan you wish to speed control.
      selector:
        entity:
          domain:
          - fan
          multiple: false
    min_fan_speed:
      name: 💨 Minimum Fan Speed
      description: Set the minimum percentage speed when your fan is still on.
      default: 16
      selector:
        number:
          min: 1.0
          max: 100.0
          mode: slider
          step: 1.0
          unit_of_measurement: '%'
    max_fan_speed:
      name: 💨 Maximum Fan Speed
      description: Set the maximum percentage speed for your fan.
      default: 100
      selector:
        number:
          min: 1.0
          max: 100.0
          mode: slider
          step: 1.0
          unit_of_measurement: '%'
    max_temp:
      name: 📈 Maximum Temperature
      description: What temperature would you like the fan to run at max fan speed.
      selector:
        entity:
          domain:
            - sensor
            - input_number
          multiple: false
    min_temp:
      name: 📉 Minimum Temperature
      description: What temperature would you like the fan to run at minimum speed.
      selector:
        entity:
          domain:
            - sensor
            - input_number
          multiple: false
    off_temp:
      name: 🛑 The temperature the fan switches off
      description: What temperature would you like the fan to turn off? When the temperature falls below this value, 
        the fan turns off. When the temperature rises above this value, the fan will automatically turn back on 
        (unless you disable this via the "Enable auto fan on" setting). 
      selector:
        entity:
          domain:
            - sensor
            - input_number
          multiple: false
    auto_turn_on_enabled:
      name: ✅ Enable auto fan on 
      description: Let the fan automatically turn back on if the temperature returns to a value above the temperature that the fan switches off
      default: true
      selector:
        boolean: {}
    change_time:
      name: ⏱️ Change frequency delay
      description: How long to delay bewteen potential speed adjustments.
      default: 30
      selector:
        number:
          min: 1.0
          max: 120.0
          unit_of_measurement: minutes
          step: 1.0
          mode: slider
    change_threshold:
      name: Minimum percentage change
      description: The minimum percentage change (between current fan speed and set
        fan speed)
      default: 1
      selector:
        number:
          min: 1.0
          max: 100.0
          mode: slider
          step: 1.0
          unit_of_measurement: '%'
    max_change:
      name: Maximum percentage change
      description: The maximum percentage change (between current fan speed and set
        fan speed)
      default: 50
      selector:
        number:
          min: 1.0
          max: 100.0
          mode: slider
          step: 1.0
          unit_of_measurement: '%'
    blocker_entity:
      name: (OPTIONAL) Blocking entity
      description: If this entity's state is on, it will prevent the automation from running. E.g. sleepmode or away mode.
      default:
      selector:
        entity:
          multiple: false

  source_url: https://community.home-assistant.io/t/adaptive-fan-speed-control-based-on-temperature-and-speed-range/678152
variables:
  temp_sensor: !input temp_sensor
  fan_switch: !input fan_switch
  max_temp_entity: !input max_temp
  min_temp_entity: !input min_temp
  off_temp_entity: !input off_temp
  auto_turn_on_enabled: !input 'auto_turn_on_enabled'

  min_fan_speed: !input min_fan_speed
  max_fan_speed: !input max_fan_speed

  max_temp: "{{ states(max_temp_entity) | float(40) }}"
  min_temp: "{{ states(min_temp_entity) | float(23) }}"
  off_temp: "{{ states(off_temp_entity) | float(22) }}"

  change_time: !input change_time
  max_change: !input max_change
  change_threshold: !input change_threshold
  blocker_entity: !input blocker_entity
  current_temp: "{{ states(temp_sensor) | float(0)}}"
  fan_speed: '{{ state_attr(fan_switch,''percentage'') | float(0)}}'
  temp_range: '{{max_temp | float(0)-min_temp | float(0)}}'
  fan_range: '{{max_fan_speed | float(0) - min_fan_speed | float(0)}}'
  slope: '{{fan_range | float(0)/temp_range | float(0)}}'
  initial_set_fan_speed: '{{ [[slope|float(0) * (current_temp|float(0) - min_temp|float(0)) + min_fan_speed|float(0),  min_fan_speed] | max, max_fan_speed] | min}}'
  adjusted_set_fan_speed: >
    {% set diff = initial_set_fan_speed - fan_speed %}
    {% if diff > max_change|float(0) %}
      {{ fan_speed + max_change|float(0) }}
    {% elif diff < -max_change|float(0) %}
      {{ fan_speed - max_change|float(0) }}
    {% else %}
      {{ initial_set_fan_speed }}
    {% endif %}
  set_fan_speed: '{{ adjusted_set_fan_speed }}'
  speed_diff: '{{(fan_speed - set_fan_speed)|abs}}'
trigger:
- platform: state
  entity_id:
  - !input fan_switch
  id: fanon
  from: 'off'
  to: 'on'
- platform: state
  id: temp_state_change
  entity_id:
  - !input temp_sensor
  - !input max_temp
  - !input min_temp
  - !input off_temp
condition:
- condition: template
  alias: Check for blocker entity
  value_template: '{{ (blocker_entity == none) or (states(blocker_entity) == ''off'')}}'
action:
- choose:
  - conditions:
    - condition: trigger
      alias: Only run if fan was switched on 
      id: fanon
    - condition: template
      alias: Is the percentage change great enough? 
      value_template: '{{ speed_diff | float(0) > change_threshold | float(0) }}'
    sequence:
    - service: homeassistant.turn_on
      data:
        percentage: '{{set_fan_speed}}'
      target:
        entity_id: '{{fan_switch}}'
    - delay:
        minutes: !input change_time
  - conditions:
    - condition: template
      value_template: '{{states(fan_switch) == ''on''}}'
      alias: Make sure the fan is already on (ignore if it's been switched off)
    - condition: template
      alias: Is the percentage change great enough? 
      value_template: '{{ speed_diff | float(0) > change_threshold | float(0) }}'
    - condition: template
      alias: Is the temperature above the off temp? 
      value_template: '{{ current_temp | float(0) > off_temp | float(0) }}'
    sequence:
    - service: homeassistant.turn_on
      target:
        entity_id: '{{fan_switch}}'
      data:
        percentage: '{{set_fan_speed}}'
    - delay:
        minutes: !input change_time
  - conditions:
    - condition: not
      alias: Make sure the fan hasn't just been turned on 
      conditions:
      - condition: trigger
        id: fanon
    - condition: numeric_state
      entity_id: !input temp_sensor
      below: !input off_temp
    sequence:
    - service: homeassistant.turn_off
      target:
        entity_id: '{{fan_switch}}'
  - conditions:
    - '{{ auto_turn_on_enabled }}'
    - condition: template
      value_template: '{{states(fan_switch) == ''off''}}'
      alias: Is the fan currently off?  
    - condition: template
      alias: Is the temperature above the off temp? 
      value_template: '{{ current_temp | float(0) > off_temp | float(0) }}'
    sequence:
    - service: homeassistant.turn_on
      data:
        percentage: '{{set_fan_speed}}'
      target:
        entity_id: '{{fan_switch}}'
    - delay:
        minutes: !input change_time
mode: single