Hi Thomas,
I would be glad if you send me more detailed pictures when you are available. I did what you said but it shows as “null”.
In logs,
“==> /var/log/openhab/openhab.log <==
2021-01-27 22: 57: 17.209 [WARN] [ab.binding.mqtt.generic.ChannelState] - Command ‘on’ not supported by type ‘OnOffValue’: No enum constant org.openhab.core.library.types. OnOffType.on”