Zigbee dimmer in Fibaro HC3 shows up as ON/OFF in HA through Fibaro integration

Configuration
1

Hi all,

My HA system (version 2025.5.0 on RPi5 with OS 15.2) is configured to use a HC3 homecenter as a bridge to Zigbee (and partly Z-wave).

Philips Hue (Zigbee directly, no Hue bridge) works incl color and dimming, Z-wave works incl dimming, but my (first and currently only) Zigbee dimmer shows up as only ON/OFF in HA. Even though dimming works fine in Fibaro homecenter.

It does see the setValue action in the device info downloaded from the Fibaro plugin in HA:

      {
        "id": 40,
        "name": "Dimmable light",
        "roomID": 220,
        "view": [
          {
            "assetsPath": "dynamic-plugins/com.fibaro.multilevelSwitch",
            "name": "com.fibaro.multilevelSwitch",
            "translatesPath": "/assets/i18n/com.fibaro.multilevelSwitch",
            "type": "ts"
          },
          {
            "assetsPath": "dynamic-plugins/favorite-positions",
            "name": "favorite-positions",
            "translatesPath": "/assets/i18n/favorite-positions",
            "type": "ts"
          }
        ],
        "type": "com.fibaro.multilevelSwitch",
        "baseType": "com.fibaro.binarySwitch",
        "enabled": true,
        "visible": true,
        "isPlugin": false,
        "parentId": 39,
        "viewXml": false,
        "hasUIView": true,
        "configXml": false,
        "interfaces": [
          "autoTurnOff",
          "favoritePosition",
          "light",
          "zigbee"
        ],
        "properties": {
          "autoOffDefaultTime": 900,
          "autoOffTimestamp": 0,
          "categories": [
            "lights"
          ],
          "configured": true,
          "dead": false,
          "deadReason": "",
          "deviceControlType": 2,
          "deviceIcon": 582,
          "deviceRole": "Light",
          "favoritePositions": [
            {
              "label": "Favourite position",
              "name": "FavoritePosition1",
              "value": 50
            }
          ],
          "favoritePositionsNativeSupport": false,
          "icon": {
            "path": "/assets/icon/fibaro/LightBulbV3/LightBulbV30.svg",
            "source": "HC"
          },
          "ieeeAddress": "xxxxxxxxxxxxxx",
          "isLight": true,
          "log": "",
          "logTemp": "",
          "manufacturer": "",
          "model": "",
          "networkAddress": xxxx,
          "saveLogs": true,
          "state": false,
          "supportedDeviceRoles": [
            "Other",
            "GarageDoor",
            "OuterBlind",
            "InnerBlind",
            "Light"
          ],
          "userDescription": "",
          "value": 0
        },
        "actions": {
          "configureFavoritePositions": 1,
          "setAutoOff": 0,
          "setFavoritePosition": 1,
          "setValue": 1,
          "toggle": 0,
          "turnOff": 0,
          "turnOn": 0
        },
        "created": 1746767834,
        "modified": 1746773062,
        "sortOrder": 17
      }

Note: it also says:
“type”: “com.fibaro.multilevelSwitch”,
“baseType”: “com.fibaro.binarySwitch”,
, but it ends up as a light because of this part in the python code of the integration:

        # Switches that control lights should show up as lights
        if platform == Platform.SWITCH and device.properties.get("isLight", False):
            platform = Platform.LIGHT
        return platform

Through the API (http://[servername]/api/devices/40/action/setValue) in postmaster, dimming works fine, but in HA it has created an entity that does not support dimming (info from states page):

lights.dimmable_light
supported_color_modes: onoff
color_mode: null
fibaro_id: 40
friendly_name: Light
supported_features: 0

Where I would expect to see supported_color_modes: brightness.

Is there something I can do to change this entity so HA knows it supports dimming? Because then I would expect the Fibaro integration to take care of the mapping between HA brightness control in the entity card and the setValue action and my problem would be solved.

2

Found it in the source of the fibaro integration (light.py):

        supports_dimming = (
            fibaro_device.has_interface("levelChange")
            and "setValue" in fibaro_device.actions
        )

This device does not have a “levelChange” interface.

For now, I installed the Fibaro integration as a custom component and changed that code to:

        supports_dimming = (
            fibaro_device.has_interface("levelChange")
            or fibaro_device.has_interface("zigbee")
        ) and (
            "setValue" in fibaro_device.actions
        )

Works for now.

I am fairly new to HA and this community. What would be a good way to proceed to see if this can be resolved in the official source code (or potentially the Fibaro API, which is then not something for this forum)?