Thank you for this tutorial! As a newbie to OpenHAB, it took me a while to figure out that it doesn’t work any more because it still uses mqtt 1.0 bindings.
I used this tutorial to migrate the MQTTv1 items to v2.
In order to make this tutorial work, make sure that the channel type you choose in the PaperUI, exactly matches the corresponding type in fhem.items. For example, the fhem.items example uses Number for the rollershutter position, so you must add a “Number Value” channel type (even if “Percentage Value” seem to make more sense). Otherwise the elements in the BasicUI just won’t do anything.
I was debugging my MQTT connection for a while, before I found out that I just used the wrong channel value type. It may just be common sense for people more experienced with OpenHAB, but maybe it helps other newbies. 