If you're on a C-7 hub, have you run the Z-Wave radio firmware update? Check Settings > Z-Wave Details for a Firmware Update (not plain Update) button at the top if you aren't sure. If it's there, click it--there's an update available that some report to help with a specific problem that sounds a lot like this one.
If not, there are other things it could be too--this is just where I'd start!
In addition to the spot-on advice from @aaiyar and @bertabcd1234 I'm wondering if you have a repeating zwave device that has become nonresponsive... or a zwave device that is flooding the network. If you can post a screenshot of your zwave details maybe something will pop out.
It is C-7 Hubitat. How can I get the log because when I go to Z-Wave details at Setting and Z-Wave Logs, it shows me nothing, even when I press All button. Does this mean, the log has not been setup to record?
Can you please tell me how to get to the log?
When the issue first started, I clicked the Update button at the Zwave Details setting and it seemed to update. Now there is no device with Update.
Btw, all the zwave devices are down (Aeotec nano dimmer, Aeotec Dua Nano Switch and nano Switch, Yale Zwave lock and Aeotec Trisensor).
All devices are stable connection. I can see this because whenever I power cycled the hub, all devices come alive ASAP but then a few hours, they go down again. No response at all.
Same. So I suspect there is some runaway app/driver that is causing the z-wave radio to turn off. Usually the zigbee radio turns off first. @IWiyanto - do you have any zigbee devices, and are they still working.
All the zigbee devices are alive and well. Only the zwave devices are down. @aaiyar, following your advice, I managed to get to log. Here is a snippet from yesterday around the time it went down.
Also do you mind telling me how to cut and paste the log as a screenshot?
Sorry I am a noob.
Yes, if devices work sporadically the radio is usually fine. I have seen this erratic behavior when some devices within the mesh are going bad. If you could send me a private message I can check your hub's engineering logs to make sure you are not dealing with a hardware malfunction.
Got it, thanks. I'll look at your hub in the morning. Meanwhile could you please check those devices listed on the Z-Wave Details table with 9.6kbps on the Route column to make sure they are working properly?
They appear at the edge of your mesh, at best, or may not be working at all. Four dead repeaters in a mesh could result in a frozen mesh.