Thanks Chris for your reply and support.
I would say there are good new and “not too bad news”, at least there is hope 
And sorry for my stupid question… how can I check if I’m using the old dingz device. I followed your instruction, deleted the app from homey and re-installed the latest version, every firmware (I have 5 dingz installled) is latest version.
So if you have deleted the dingz app and reinstalled everything, you will automatically only have ‘new’ devices.
BDW: The migration (except for the sensor) would have been done by the dingz app itself the first time it was started. >> ‘RTFM’ 
I “RTFM”.
Did it once again, first deinstalled, then followed exactly the installation. Result: Dingz appears in the app section
Homey 101 > Refresh the page 
…
Finally the sequence “Uninstall dingz app – shut down and restart homey – install dingz-app” worked.
Hi Chris
I can’t get any further. I always get the same error message: MQTT: Connect Econnrefused 192…: 1883.
I can’t get any further.
Many thanks for your help
- Some change
