From wladislaw https://community.home-assistant.io/t/zigbee2mqtt-muller-licht-tint-remote-mli-404011/372049/10

home-assistant_z2m_mueller_remote_404011.yaml

blueprint:
  name: Muller Licht Remote (Zigbee2MQTT)
  domain: automation
  input:
    remote:
      name: Remote mqtt topic
      description: This must be the TOPIC from zigbee2mqtt. For example z2m/remote_1
      selector:
        text:
    target_light_1:
      name: Light 1
      description: Lights to control for 1 (*--)
      selector:
        target:
          entity:
            domain: light
    target_light_2:
      name: Light 2
      description: Lights to control for 2 (-*-)
      selector:
        target:
          entity:
            domain: light
    target_light_3:
      name: Light 3
      description: Lights to control for 3 (--*)
      selector:
        target:
          entity:
            domain: light
    step:
      name: Dimming step in percent
      default: 10
      selector:
        number:
          min: 0.0
          max: 50.0
          mode: slider
          step: 1.0
          unit_of_measurement: "%"
    scene_3:
      name: Reading scene
      selector:
        target:
    scene_1:
      name: Sunset scene
      selector:
        target:
    scene_2:
      name: Party scene
      selector:
        target:
    scene_6:
      name: Night scene
      selector:
        target:
    scene_4:
      name: Fire scene
      selector:
        target:
    scene_5:
      name: Romantic scene
      selector:
        target:
trigger:
  - platform: mqtt
    topic: !input "remote"

condition: []
action:
  - choose:
      - conditions:
          - condition: template
            value_template: '{{ action_name=="on" }}'
        sequence:
          - service: light.turn_on
            target: "{{ target_device }}"
      - conditions:
          - condition: template
            value_template: '{{ action_name=="off" }}'
        sequence:
          - service: light.turn_off
            target: "{{ target_device }}"
      - conditions:
          - condition: template
            value_template: |-
              {{ 
                 (action_name=="scene_1") 
              }}
        sequence:
          - service: homeassistant.turn_on
            target: !input 'scene_1'
      - conditions:
          - condition: template
            value_template: |-
              {{ 
                 (action_name=="scene_2") 
              }}        
        sequence:
          - service: homeassistant.turn_on
            target: !input 'scene_2'
      - conditions:
          - condition: template
            value_template: |-
              {{ 
                 (action_name=="scene_3") 
              }}
        sequence:
          - service: homeassistant.turn_on
            target: !input 'scene_3'
      - conditions:
          - condition: template
            value_template: |-
              {{ 
                 (action_name=="scene_4") 
              }}
        sequence:
          - service: homeassistant.turn_on
            target: !input 'scene_4'
      - conditions:
          - condition: template
            value_template: |-
              {{ 
                 (action_name=="scene_5") 
              }}
        sequence:
          - service: homeassistant.turn_on
            target: !input 'scene_5'
      - conditions:
          - condition: template
            value_template: |-
              {{ 
                 (action_name=="scene_6") 
              }}
        sequence:
          - service: homeassistant.turn_on
            target: !input 'scene_6'
      - conditions:
          - condition: template
            value_template: |-
              {{ 
                 (action_name=="color_temperature_move") 
              }}
        sequence:
          - service: light.turn_on
            target: "{{ target_device }}"
            data_template:
              color_temp: "{{ action_color_temp }}"
      - conditions:
          - condition: template
            value_template: |-
              {{ 
                 (action_name=="brightness_step_down") 
              }}
        sequence:
          - service: light.turn_on
            target: "{{ target_device }}"
            data_template:
              brightness_step_pct: "{{ negative_step }}"
              transition: 1
      - conditions:
          - condition: template
            value_template: |-
              {{ 
                 (action_name=="brightness_step_up") 
              }}
        sequence:
          - service: light.turn_on
            target: "{{ target_device }}"
            data_template:
              brightness_step_pct: "{{ step }}"
              transition: 1
      - conditions:
          - condition: template
            value_template: |-
              {{ 
                 (action_name=="color_move") 
              }}
        sequence:
          - service: light.turn_on
            target: "{{ target_device }}"
            data_template:
              xy_color:
                - "{{trigger.payload_json.action_color.x}}"
                - "{{trigger.payload_json.action_color.y}}"
    default:
      - service: logbook.log
        data:
          name: Oops
          message: Unhandled remote action "{{ action_name }}" --- "{{ action_color_temp }}" --- "{{ action_color }}"
mode: single
variables:
  step: !input "step"
  negative_step: "{{ -1 * (step | int) }}"
  action_color_temp: '{{ trigger.payload_json.action_color_temperature }}'
  action_color: '{{ trigger.payload_json.action_color }}'
  action_name: '{{ trigger.payload_json.action }}'
  target_light_1: !input 'target_light_1'
  target_light_2: !input 'target_light_2'
  target_light_3: !input 'target_light_3'
  target_device: |-
    {%- if trigger.payload_json.action_group==16388 -%} 
    {{ target_light_1 }}
    {%- elif trigger.payload_json.action_group==16389 -%}
    {{ target_light_2 }}
    {%- elif trigger.payload_json.action_group==16390 -%} 
    {{ target_light_3 }}
    {%- else -%} 
    unknown
    {%- endif -%}