All my suspicions were wrong. It turned out to be one Fibaro double switch 2 that was somehow preventing syncing to complete.
Here’s what I did:
- Backup Homey
- Remove apps one by one and try to link Homey to GH.
- I discovered that when I removed the Fibaro app, all remaining devices synced.
- Restore backup
- I designed a schedule to remove sets of Fibaro devices in groups (I have 50+). After verifying with Athom support I knew that when I remove a zwave device, the devices considers itself unregistered. So a restore would mean I would have to re-register each removed device again!
This can be avoided. Thanks to the tip by Homey support, I noted for each device the circuit breaker that feeds it. When a device is not powered you can remove it from Homey (with a 30s wait), but the device, when powered up, still considers itself registered to Homey. So restoring a backup is then straightforward.
- I switched off the first circuit breaker and selected one of the oldest devices…and tried to link Homey with GH … I was lucky! All 159 devices synced right away and none stayed offline.
A big thank you to Homey support who did more than could be expected of them in checking my set up and guiding me through this process.
