ESPHome Cover.Control - set a relative position

ESPHome
1

Hello there!

I got several WiFi enabled wall switches i flashed with ESPHome via Tuya-Convert and try to replace built-in switches for the motorized skylights in my flat.

Basically it’s dependant on the cover component. So far so good. I got most of the parts working, but right now i am stuck on the position control. The cover.control allows to call a position to be set. It looks to be an absolute value, but i would like to be able to set a relative position with every button click and can’t wrap my mind about it.

Here is a snippet of code:

cover:
  - platform: time_based
    name: "${devicename} Dachluke"
    id: dachluke
    device_class: window
    open_action:
      - switch.turn_on: relay_1
    open_duration: 10s

    close_action:
      - switch.turn_on: relay_2
    close_duration: 10s

    stop_action:
      - switch.turn_off: relay_1
      - switch.turn_off: relay_2

# my button to be pressed
binary_sensor:
  - platform: gpio
    pin: 
      number: 4
      mode: INPUT_PULLUP
      inverted: True
    id: button_left
    on_multi_click:
    - timing:
        - ON for at most 0.7s
        - OFF for at least 0.5s
      then:
        - cover.control:
            id: dachluke
            position: 25%

Maybe an experienced mind has an idea how to wrap this up with lambdas or so, that would be awesome! =)