[homekit] Color temperature behaviour OH 4.3

[blue-kaleidoscope]

Hi,

this issue is related to a longer discussion on the OH forum: [openHAB 4.3 Milestone discussion](https://community.openhab.org/t/openhab-4-3-milestone-discussion/158139/114?u=jabra_the_hut)

Expected Behavior

When using OH 4.2.1 all my color temperature items behave perfectly normal both on OH UI and on Homekit side. Example item:

Number          Deckenlampe_Hobbyraum_Farbtemperatur
                "Farbtemperatur Deckenlampen Hobbyraum"
                <colorpicker>
                (Deckenlampen_Hobbyraum, Lampen_Farbtemperatur)
                ["Control", "ColorTemperature"]
                {
                    stateDescription=" "[
                            min="250",
                            max="454",
                            step="1",
                            pattern="%.0f mired"
                        ],
                    unit="mired",
                    homekit="Lighting.ColorTemperature",
                    channel ="deconz:colortemperaturelight:raspi4:Deckenlampe_Hobbyraum_Buecherregal:color_temperature" [ profile="ruby:mired_to_kelvin" ],
                    channel ="deconz:colortemperaturelight:raspi4:Deckenlampe_Hobbyraum_Mitte:color_temperature" [ profile="ruby:mired_to_kelvin" ],
                    channel ="deconz:colortemperaturelight:raspi4:Deckenlampe_Hobbyraum_Schreibtisch:color_temperature" [ profile="ruby:mired_to_kelvin" ]
                }

I am using a JRuby profile to convert between Mired and Kelvin which is attached to each color temperature channel. The profile looks as follows:

profile(:mired_to_kelvin) do |event, callback:, command:, state:|
  case event
  when :command_from_item
    callback.handle_command(command | "mired" | "K")
    
  when :state_from_handler
    mired = state.to_f | "K" | "mired"
    callback.send_update(mired.to_f)
  else
    true
  end
  false
end

In Homekit my lights look like this:

With OH 4.3 I have issues with the color temperature items. They look like that in the homekit app:

I tried all different configurations from the documentation. But none works with OH 4.3. I have the impression that the example

// Dimmer item, with allowed range given in Kelvin
Dimmer light_temp { homekit="Lighting.ColorTemperature"[ minValue="2700 K", maxValue="5000 K" ]}

does not even work with OH 4.2.

I tried it with OH 4.3.1 and 4.3.2.

[openhab-bot]

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

https://community.openhab.org/t/openhab-4-3-milestone-discussion/158139/147