I believe I am not the only one having occasional problems with unreachable Z-wave devices. You can easily spot them on developer.athom.com/tools/zwave. But wouldn’t it be nice to be notified by Homey about such malfunctions in stead of experiencing suddenly not working flows? It would be even better to have a repair option in Homey.
Unreachable doesn’t mean it is unusable. It just states that it has missed a request at some time for whatever reason. Mostly the device is working fine. You can try that by using the “Test” function behind the 3 dots on the end. Or, in case of a plug, send a “basic on (or off)” command. In 99.9% of the time it will switch immediately.
If the device is marked “unknown” in the “Route” column it is really unusable.
This is what Athom replied when i asked:
A useful correction. Thanks. Still, I have unusable devices at least every month. A notification would be very useful.
Then define unusable. Empty battery? Do you have to re-pair? Or are they working again after pressing a button?
You might try the “A device hasn’t reported” trigger card, but that only works if the device stops responding to Homey completely.
I agree it would be useful to have flow cards:
- Z-wave device hasn’t acknowledge command
- Send z-wave “Test” command
- Heal device
And generally everything which is available in developer tools panel should be available via flow cards.
What I meant with unusable is not responding to commands from Homey (either directly or in a flow). The most common solution, for wall plugs, is to remove the plug from the socket and re-insert it. Your “hasn’t reported” card might be a very good idea to get notified. I will try that.
What brand are the plugs?
I have Neo Coolcam and Fibaro. It is not only a price difference. With Fibaro I have experienced this problem once. A Neo Coolcam plug typically fails 2 to 3 times per year. In 95% of the cases pull-the-plug works.
Knowing when to pull-the-plug would be nice.
Do you have the latest version of the Coolcam app?
Do you have unknown nodes or strange node numbers in the Z-Wave mesh?
All apps are updated automatically. And indeed I do have numbers in the routing table that are non-existing nodes like 128 and 132. It feels like my Z-wave mesh is becoming more and more unstable. At this very moment 8 out of 15 devices have an unknown route and do not respond. Heal or restart Homey does not have any effect. Pull-the-plug or deleting and re-including seem to be the only options. Usually. For some devices this will be the second time in a few days pull-the-plug is needed.
Ghost nodes generally only appear with unknown devices because the path of unknown devices can’t be determined. Unknown as in removed physically and not unpaired or empty battery so not responding. They are most of the times only marked as unknown after a reboot.