perhaps there is trouble between the MQTT client that i am using and the MQTT Server
what i found is this one
https://github.com/home-assistant/home-a...issues/854
can you check if you can really make the broker use 3.1.1. and see if it will work then.
what i found is this one
https://github.com/home-assistant/home-a...issues/854
can you check if you can really make the broker use 3.1.1. and see if it will work then.