SOS: Strange error on changing existing device

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Hello @mwittig and other @developer,

During testing of the pimatic-woox plugin I am getting a strange error when editing and saving the device.
This only occurs after the color attribute was updated during runtime.
E.g: When editing and saving without a runtime change to color, all works fine. After updating color, then editing and saving the device, an error occurs:
Error restoring changed device woox-test-lamp: No type for color of Woox Test Lamp given
This error is generated by Pimatic::device._checkAttribute(attrName)

The type of color is clearly set (see constructor below).
I have tested in every way imaginable, including commenting out any code that would update the color attribute. Also deleted the entire DB.
Any thoughts are appreciated! PM me if needed.

Below the constructor of the device:

 class WooxRGBWLight extends env.devices.DimmerActuator
    
    template: 'wooxdimmer-rgb'

    constructor: (@config, lastState, plugin, framework) ->
      @debug = plugin.config.debug ? false
      @base = commons.base @, @config.class
      
      @id = @config.id
      @name = @config.name
      
      @addAttribute 'color',
        description: "Hex Color",
        type: t.string
      @addAttribute 'ct',
        description: "WW Color",
        type: t.number

      @actions.setColor =
        description: 'set a light color'
        params:
          colorCode:
            type: t.string
      @actions.setCT =
        description: 'set light CT color'
        params:
          colorCode:
            type: t.number
            
      @_state = lastState?.state?.value or off
      @_mode = lastState?.mode?.value or "white"
      @_ct = lastState?.ct?.value or 100
      @_color = lastState?.color?.value or 'FFFFFF'
      @_hue = lastState?.hue?.value or 0
      @_saturation = lastState?.saturation?.value or 0
      @_brightness = lastState?.brightness?.value or 100
      @_dimlevel = lastState?.dimlevel?.value or 0
            

      super()

The code above should not give the error.
What is the config in config.json of ‘Woox Test Lamp’?
And did you try to eliminate the gui by commenting ‘template: ‘wooxdimmer-rgb’’?

@bertreb :
I havent eliminated the GUI yet as that was the basis of my test.
funny enough, when I get the device info through the http API all seems to be fine too, where color reports to be a type: string.

Below the config of the device in config.json, as you can see no reference to color as it is a variable throughout the lifespan of the instance:

    {
      "deviceID": "<edited out>",
      "deviceKey": "<edited out>",
      "hap": {
        "service": "Lightbulb"
      },
      "id": "woox-test-lamp",
      "name": "Woox Test Lamp",
      "class": "WooxRGBWLight",
      "minTemp": 2000,
      "maxTemp": 10000,
      "ip": "192.168.2.56",
      "port": 6668
    }

It should not matter but what happens if you declare the attributes

attributes:
  color:
     description: ...

@bertreb tried that, no resolve…

My current code is at https://github.com/SenTzu01/pimatic-woox, really I am clueless.

@bertreb You the man!!
Changing the type from t.string to ‘string’, thereby bypassing the env.require(‘decl-api’).types solves the problem!!

So if we really want to know what bugs we need to investigate the module, guess thats for the maintainer

Anyway, really appreciate your time and effort tonight!!

Dan