fans.yaml

  - platform: mqtt  
    name: "ConservatoryFan"
    command_topic: "cmnd/conservatoryfan/FanSpeed"
    speed_command_topic: "cmnd/conservatoryfan/FanSpeed"    
    state_topic: "stat/conservatoryfan/RESULT"
    speed_state_topic: "stat/conservatoryfan/RESULT"
    state_value_template: >
      {% if value_json.FanSpeed is defined %}
        {% if value_json.FanSpeed == 0 -%}0{%- elif value_json.FanSpeed > 0 -%}4{%- endif %}
      {% else %}
        {% if states.fan.conservatoryfan.state == 'off' -%}0{%- elif states.fan.conservatoryfan.state == 'on' -%}4{%- endif %}
      {% endif %}
    speed_value_template: "{{ value_json.FanSpeed }}"
    availability_topic: tele/conservatoryfan/LWT
    payload_off: "0"
    payload_on: "4"
    payload_low_speed: "1"
    payload_medium_speed: "2"
    payload_high_speed: "3"
    payload_available: Online
    payload_not_available: Offline
    speeds:
      - off
      - low
      - medium
      - high