Z-wave devices not responding to C8

[jtp10181]

@jtp10181

Z-Wave Issues

For partial or total loss of Z-Wave control (radio seems dead), before doing anything else please shut down the hub from settings and unplug for 30 seconds, then re-plug to boot back up. This will allow the radios to fully power down and restart. A regular reboot only restarts the platform and not the radio hardware.

Official Hubitat Documentation Resources:
Hubitat Docs: Z-Wave Details
Hubitat Docs: How to Troubleshoot Z-Wave

What info to provide for troubleshooting assistance:

• How is Hub being powered? Supplied power block or other (explain)
  • PoE power (with splitter) is known to cause major Z-Wave issues on the C-8 hub.
  • See this post for detailed write up on PoE testing: PoE and the C8
• Provide screenshots showing entire Z-Wave details Page
• Provide screenshot of Z-Wave Topology Map (red/blue squares)

@kkl

Why would half the devices suddenly fail, and then a different mixture of devices be failed on the next repair attempt? Shouldn't the non-failed devices that directly communicate with the hub respond?

Not if there is a failed device that is spewing out garbage and polluting the mesh with traffic. Or also, if there is a device that many others like to route through it can chaos for a while as everything tries to figure out new routes.

Also a single repair is pretty intense on the mesh on its own, so after a full repair with a bunch of failed nodes you may have actually made things worse short term.