[shelly] Plus 2PM: new channel for tilt_pos

[Larsen-Locke]

The Shelly Plus 2 PM has an option to enable slat control for venetian blinds (raffstore). When this option is enabled, it's possible to control the slat angle independently of the height.

The value of tilt_pos can be set via rpc but not with the binding.
The payload to set tilt_pos should look something like this:

{
  "id": 1,
  "src": "openhab",
  "method": "Cover.GoToPosition",
  "params": {
    "tilt_pos": 50
  }
}

This feature request is about a new channel of type dimmer that allows to read and write tilt_pos.

[openhab-bot]

This issue has been mentioned on openHAB Community. There might be relevant details there:

https://community.openhab.org/t/shelly-binding/56862/4958