Channel error on double roller shutter rocker: BUSCH-JAEGER 6213/2.1

[ML19821]

I have a double rocker:
BUSCH-JAEGER 6213/2.1

I use it as:

• Roller shutter sensor
• light dimming sensor
• Roller shutter actuator

Currently the thing has the following channels, but for the light dimming channel i get the following errors:
UNINITIALIZED UNINITIALIZED (HANDLER_INITIALIZING_ERROR): Cannot read field "channelId" because the return value of "org.openhab.binding.freeathomesystem.internal.datamodel.FreeAtHomeDatapointGroup.getOutputDatapoint()" is null

If possible, I would also like to intercept a double click on the shutter sensor and the light dimming sensor.

The Json file from Swagger is attached.
response_1694350296885.json.txt

[andrasU]

Currently I do not see the root cause of this issue. I need to dig deeper an dunderstand. Did you have maybe a log-file for this case?

[ML19821]

Does this help you?

[andrasU]

I found the root of the issue.

Thr root cause is the datapoint for your dimming button is reporting 16 - AL_RELATIVE_SET_VALUE_CONTROL, however the dimming buttons shall report 17 - AL_ABSOLUTE_SET_VALUE_CONTROL
The 17 is handled in the binding the 16 is not yet implemented.

Additionally. Based on the ABB-BJ documentation this configuration with the paringID 16 can dim only in defined steps. Which is represented in 3 bits therefore:
0: stop
1: 100%
2: 50%
3: 25%
4: 12.5%
5: 6.25%
6: 3.125%
7: 1.5625%

In your json file is the value 8 which would mean that the dimming in that case was 0%:stop.

To be able to make a proper implementsation could you give me a hint how did you configured in your sysap and please send me two json outputs with 0% and max dimming.

Thank you

[ML19821]

@andrasU Thanks for your efforts.

I configured it on SysApp like this:

And here are three jsons, with the lights off, the lights on and dimmed to min and max.
OFF_response_1704129223969.json.txt
MIN_response_1704129266262.json.txt
MAX_response_1704129317763.json.txt