When combining the definitions of the bridge and things in one file, the system did behave quite strange. Things were not updated or I had to rename the broker. Accordingly I moved the definition of the bridge in a separate file.

At the moment i switch from Mqtt 1.x to Mqtt2.x binding and wonder why it get so complicated (to get fancy ui integration) and dont forward the clean&easy way.

The new MQTT architecture has been realized in an easy extensible, modular way. The different bundles are fully test covered to live up to the high coding standards of openHAB.