Lost All Z-Wave Nodes?

Configuration Z-Wave
1

I just experienced a power outage for about 30-45 minutes. When power returned and HASS started up again, my entire z-wave network was gone. HASS is seeing my z-wave stick, but none of the nodes are showing up. The devices themselves are fine, everything still works manually, so I don’t think they all are fried (the battery devices aren’t seen either). The OZW log isn’t showing any errors and no z-wave errors in the log. Is there anyone to get my 50ish devices back without manually adding each one?

Edit: Deleting the bef.xml file seemed to get all my powered devices back, but all my battery powered sensors are showing up as unknown, ala Z-Wave node 15 not ready after 30 seconds, continuing anyway. Any thoughts on getting these back?

2

Do you have a recent back up of your zwcfg_xxx.xml file? If so, shutdown Hass, replace the file, and restart. That usually does the trick.

1 Like
3

Yeah, luckily, I did. I went back to my old hass instance and stole it from there. Sensors are now back. Very strange behavior, but glad I was able to get it sorted

4

This saved me too: restoring the zwcfg_xxx. xml file from the backup.
Anyone knows what might cause this?
Seems to be some kind of configuration writing that do not occur at some point.

5

A power failure or improper shutdown of the system.

6

Thank you for the feedback. I would assume, though, what´s written to disk stays on disk, even in the case of power failure…? Meaning in the case of power failure, or a improper shutdown we´ll only loose the last info not written to disk… yet?

I am quite new to virtual machines, but am runnig Ubuntu in VirtualBox.
At what point, except for proper shutdown, can I be sure the disk is written, saving the latest changes?

How will I do a proper shutdown/reboot of the entire VirtualBox, or even the host machine VB is running on?

7

If you interrupt openzwave while it’s outputting the file to the disk (overwriting the file) you can end up with an incomplete or missing file.

Keep a backup of your last known good configuration and you can just restore if something goes wrong.

8

I do keep 6 days of config in a backup, and even one version for every month.
Today I learned that replacing the zwcfg_xxx.xml file from the backup file, got all the lost nodes to re-appear. That´s just perfect.

However I have asked in this forum before; where the zwave config is stored, and learned from the answers the only place is in the Aeotec z-stick gen5.
Anyway; It seems like the xml file also includes enough info to re-establish a messed-up z-wave network.