How to make a dumb device smart using a Shelly PM1 | Fan Template example in Home Assistant

shellypm1_fan.yaml

fan:
  - platform: template
    fans:
      template_bedroom_fan:
        friendly_name: "Master Bedroom Fan"
        # Measures the power use from a Shelly1 PM and if over 3W, marks the fan as on
        value_template: "{% if states('sensor.bedroom_fan_shelly_power') | float > 3 %}on{% else %}off{% endif %}"
        # Uses the Shelly1 PM sensor value to determine what speed the fan is going at. Only set to measure 1, 2 & 3
        speed_template: "{{ states('sensor.template_fan_speed_master') }}"
        # Uses a fake switch from an input_boolean as the fan has no way of reporting direction back to HA
        direction_template: "{{ 'forward' if is_state('input_boolean.master_fan_direction', 'on') else 'reverse' }}"

        turn_on:
          service: script.bedroom_fan_on
        turn_off:
          service: script.bedroom_fan_off
        set_speed:
          service: script.master_fan_set_speed
          data_template:
            speed: "{{ speed }}"
        set_direction:
          - service: broadlink.send
            data:
              host: !secret broadlink_ip
              packet: !secret 0101_direction
          - service: input_boolean.toggle
            entity_id: input_boolean.master_fan_direction

        speeds:
          - 'Off'
          - '1' ## 4.27~5.07 watts ##
          - '2' ## 6.33~6.67 watts ##
          - '3' ## 9.46~9.93 watts ##

input_select:
  master_fan_set_speed:
    name: Master Bedroom Speed
    options:
      - 'Off'
      - '1'
      - '2'
      - '3'
    icon: mdi:fan

## Creates a fake sensor to allow the fwd/rev template to work ##
input_boolean:
  master_fan_direction:
    name: Master Fan Direction

## SCRIPTS ##
script:
  bedroom_fan_off:
    alias: MasterFan (Off)
    sequence:
      service: broadlink.send
      data:
        host: !secret broadlink_ip
        packet: !secret 0101_stop

  bedroom_fan_on:
    alias: MasterFan (On)
    sequence:
      - service_template: >
          {% if is_state("input_select.master_fan_set_speed", "Off") %}
            script.bedroom_fan_off
          {% elif is_state("input_select.master_fan_set_speed", "1") %}
            script.bedroom_fan_1
          {% elif is_state("input_select.master_fan_set_speed", "2") %}
            script.bedroom_fan_2
          {% elif is_state("input_select.master_fan_set_speed", "3") %}
            script.bedroom_fan_3
          {% endif %}

  bedroom_fan_1:
    alias: Master Fan Speed 1
    sequence:
      - service: broadlink.send
        data:
          host: !secret broadlink_ip
          packet: !secret 0101_speed1

  bedroom_fan_2:
    alias: Master Fan Speed 2
    sequence:
      - service: broadlink.send
        data:
          host: !secret broadlink_ip
          packet: !secret 0101_speed2

  bedroom_fan_3:
    alias: Master Fan Speed 3
    sequence:
      - service: broadlink.send
        data:
          host: !secret broadlink_ip
          packet: !secret 0101_speed3

## Forum feedback that suggested this code here ##
## https://community.home-assistant.io/t/template-fan-configuration/60603/9 ##
  master_fan_set_speed:
    alias: Master Fan Set Speed
    sequence:
    - service: input_select.select_option
      data_template:
        entity_id: input_select.master_fan_set_speed
        option: '{{speed}}'
    - service: script.turn_on
      data_template:
        entity_id: script.bedroom_fan_{{ speed }}

## Forum feedback that suggested this code here ##
## https://community.home-assistant.io/t/help-with-a-template-sensor-that-sets-a-number-based-on-values-between-two-numbers/131888/3 ##

## Sensor is used for the speed_template to determine how fast the fan is going based on power consumption
sensor:
  - platform: template
    sensors:
      template_fan_speed_master:
        friendly_name: Master Estimated Fan Speed
        value_template: >-
         {% set fan_power = states('sensor.bedroom_fan_shelly_power') | float %}

         {% if 3 < fan_power < 6 %}
           1
         {% elif 6 <= fan_power < 8 %}
           2
         {% elif fan_power >= 8 %}
           3
         {% else %}
           Off
         {% endif %}

## Speed Reference ##
## (Off) <3 watts
## (1) 4.27~5.07 watts
## (2) 6.33~6.67 watts
## (3) 9.46~9.93 watts

Updated full template to include !secret and modified speed_template and direction_template to read values from the Shelly1 PM (power/watts) and an input_boolean to fake direction feedback.