TV play - dim esphome.io light

Configuration
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1

Hi,
I have my TV and a simple light with esp8266 and esphome.io installed. When I play something on the TV the light should dim itself to 50%. How can I automate this with HomeAssistant?
The YAML of the light is:

 esphome:
   name: wohnzimmerlicht
   area: Wohnzimmer
 esp8266:
   board: d1_mini
   framework:
     version: recommended
 
 logger:
 # Enable Home Assistant API
 api:
   encryption:
     key: "="
 
 ota:
   password: ""
 
 wifi:
   ssid: "x"
   password: "x"
 
   # Enable fallback hotspot (captive portal) in case wifi connection fails
   ap:
     ssid: " Fallback Hotspot"
     password: "x"
 
 sensor:
   - platform: bme280
     temperature:
       name: "BME280 Temperature"
       oversampling: 16x
     pressure:
       name: "BME280 Pressure"
     humidity:
       name: "BME280 Humidity"
     address: 0x76
     update_interval: 5s
 
 light:
   - platform: monochromatic
     name: "TV Lampe"
     output: light_output
     id: light_wohnzimmer
 
 output:
   - id: light_output
     platform: esp8266_pwm
     pin: D7
     
 binary_sensor:
   - platform: gpio
     pin:
       number: D5
       mode: INPUT_PULLUP
     name: "Schalter Wohnzimmerlicht"
     id: switch_
     filters:
       - delayed_on: 100ms
       - delayed_off: 100ms
     on_state: 
       then:
         - if:
             condition:
               light.is_on: light_wohnzimmer
             then: 
                   - output.turn_off: light_output
                   - light.turn_off: light_wohnzimmer
             else:
               - if:
                   condition:
                     light.is_off: light_wohnzimmer
                   then:
                     - output.turn_on: light_output
                     - light.turn_on: light_wohnzimmer
     device_class: light
 
 i2c:
   sda: D2
   scl: D1

In HomeAssistand I created the following automation:
alias:

  TV play
  description: TV play, Wohnzimmerlicht gedimmt
  trigger:
    - platform: device
      device_id: f18cc976500199293c21b6ff0c9304f6
      domain: media_player
      entity_id: f48a437ef50069308d0810348c8059e9
      type: playing
  condition: []
  action:
    - device_id: 74baef618f74639e23f0ec5bde6ac63c
      domain: light
      entity_id: bd4663cc2d80d03ef180f5051bd741ff
      type: brightness_decrease
  mode: single

Where do I specify the dim level?

2

Use the light.turn_on service.

- service: light.turn_on
  target:
    entity_id: light.tv_lampe
  data:
    brightness_pct: 50

See here for more: https://www.home-assistant.io/integrations/light/#service-lightturn_on

3

Thank you, Tom!
So I have to use ‘turn light on’ and set brightness instead of ‘dim light’.

4

You should avoid device automations altogether.

See: Why and how to avoid device_ids in automations and scripts

5

I used the visual editor to create this. Just posted the config as text. It is barely read and understandable
Thanks for the link, I will read it later and hopefully get used to the better notation right away!

6

You can still use the UI editor and avoid device ids.