thinkpad-backlight.yaml

shell_command:
  set_backlight_level: "sysctl /sys/class/backlight/intel_backlight/brightness={{ brightness|int * 18.8|int|default(4794) }}"
  set_backlight_off: "echo 0 > /sys/class/backlight/intel_backlight/brightness"
  set_backlight_on: "echo 4794 > /sys/class/backlight/intel_backlight/brightness"
command_line:
  - sensor:
      name: Laptop Backlight Status
      command: "cat /sys/class/backlight/intel_backlight/actual_brightness"
      scan_interval: 10
      unique_id: sensor.laptop_backlight_status
light:
  - platform: template
    lights:
      thinkpad_backlight:
        friendly_name: "Thinkpad Backlight"
        level_template: "{{ states('sensor.laptop_backlight_status')|int / 18.8|int }}"
        value_template: "{{ states('sensor.laptop_backlight_status')|int > 0 }}"
        turn_on:
          service: shell_command.set_backlight_on
        turn_off:
          service: shell_command.set_backlight_off
        set_level:
          service: shell_command.set_backlight_level
          data:
            brightness: "{{ brightness }}"