Hi,
I have a problem configuring the buttons of my Ubisys D1/S2/C4. It is not possible (anymore) to adjust groups to the buttons. I tried:
- modern Phoscon GUI
- the old web interface
- the bind box in the deCONZ GUI
After that I tried to use my homeassistant instance, but there are no events for the buttons reported and I am sure, that there have been some time ago!
So I did take a look using the REST interface and there’s something interesting to see in the result. Let’s have a look:
"12": {
  "config": {
    "group": "25,26,27,28",
    "mode": "momentary",
    "on": true,
    "reachable": true
  },
  "ep": 1,
  "etag": "3b1fcce7f00f060156cad90256f13f89",
  "lastannounced": "2021-09-26T22:31:35Z",
  "lastseen": "2021-12-31T08:21Z",
  "manufacturername": "ubisys",
  "mode": 1,
  "modelid": "C4 (5504)",
  "name": "Schalter Küchenzeile",
  "state": {
    "buttonevent": 1002,
    "lastupdated": "2020-12-15T22:00:31.416"
  },
  "swversion": "1.9.3",
  "type": "ZHASwitch",
  "uniqueid": "00:1f:ee:00:00:00:4d:18-01-0006"
}
Did you spot it?
It claims that the last button even has been about a year ago! But;
- I do use them more often   
- And they work with the groups I assigned ages ago to them! I just cannot assign new groups.
All devices should be on latest firmware, but my impression is that it wasn’t a firmware update but is rather a problem with deCONZ. I had the problem with an older firmware too (button assignment) and hoped an update would resolve is, but it didn’t.
I could even live without the direct assignment of the buttons as long as the events get emitted, because then I just would use homeassistant…
