Yes, so it was a basic error, indeed. . After correcting no more errors for ebus binding but nothing new in inbox I have read today the ebus forum a lot and I have a little bit better understanding. I have tried with 2 ready custom json files for VR61 in the forum:
but without result.
Then I have noticed that "identification": ["56 36 31 30 29"] in both files might be wrong. After changing to ["56 36 31 30 30"] I can see “Vaillant VR61 (50)” in Inbox!