OK, unfortunately I cannot try myself now. But I suspect the channel configuration syntax to be wrong somewhat. I could not find any good documentation on that, to verify. But could you try once to set the channel config via PaperUI or HabMin?
For me it looks like it can be done on the Thing level. Maybe OH2 removed the possibility of channel configs on the item!?
If somebody can give a working example of any binding of a channel configuration on item level, that would help.
