on_off_dim_switch.yaml

blueprint:
  name: Single button dim switch
  description: Switch a light on/off by pressing a button.
    Dim it up/down (depending on it's current state) by holding the same button.
  domain: automation
  input:
    button:
      name: Push button
      description:
        Entity representing a physical push button (which restores its position
        when released). It must emit a square signal on press.
        This automation is triggered by its falling edge.
      selector:
        entity:
          domain: binary_sensor
    light:
      name: Light
      selector:
        entity:
          domain: light
    hold_threshold:
      name: Hold threshold
      description: Time to consider button is being held, instead of just pushed.
      default: "0.8"
      selector:
        number:
          min: "0.05"
          max: "10"
          step: "0.05"
          unit_of_measurement: s
    brightness_threshold:
      name: Brightness threshold
      description: If the light brightness is above this value,
        the light is going to dim down when holding the button.
      default: "130"
      selector:
        number:
          min: "0"
          max: "255"
    brightness_step_pct:
      name: Brightness step
      description: Percentage brightness increase/decrease in each transition step.
      default: "20"
      selector:
        number:
          min: "1"
          max: "100"
          unit_of_measurement: "%"
    transition_step_length:
      name: Transition step lenght
      description: Length of each transition step.
      default: "0.1"
      selector:
        number:
          min: "0"
          max: "5"
          step: "0.01"
          unit_of_measurement: s

mode: single

trigger:
  - platform: state
    entity_id: !input button
    to: "on"

action:
  - variables:
      brightness_step_pct_positive: !input brightness_step_pct
  - variables:
      brightness_step_pct_negative: "{{ brightness_step_pct_positive|int * -1 }}"
  - wait_for_trigger:
      - platform: state
        entity_id: !input button
        to: "off"
        from: "on"
    timeout: !input hold_threshold
    continue_on_timeout: true
  - choose:
      - conditions:
          # when no trigger came (button has not been switched back to
          # off state during timeout) = button is being held
          - condition: template
            value_template: "{{ wait.trigger == none }}"
        sequence:
          - choose:
              - conditions:
                  # when brightness level is high
                  - condition: numeric_state
                    entity_id: !input light
                    attribute: brightness
                    above: !input brightness_threshold
                sequence:
                  # dim down
                  - repeat:
                      while:
                        - condition: state
                          entity_id: !input button
                          state: "on"
                      sequence:
                        - service: light.turn_on
                          data:
                            transition: !input transition_step_length
                            brightness_step_pct: "{{ brightness_step_pct_negative }}"
                          entity_id: !input light
            default:
              # otherwise, dim up
              - repeat:
                  while:
                    - condition: state
                      entity_id: !input button
                      state: "on"
                  sequence:
                    - service: light.turn_on
                      data:
                        transition: !input transition_step_length
                        brightness_step_pct: "{{ brightness_step_pct_positive }}"
                      entity_id: !input light

    # when trigger came (button has been released within timeout)
    default:
      - service: light.toggle
        entity_id: !input light