All Z-wave devices stopped working - Help!

two places to run a z-wave repair:

  1. use the ST app. find and open your hub, tap on the 3 dots, select Settings, open z-wave utilities to find z-wave repair
  2. use the Advanced Web App go to the hubs section, tap on the name of your hub to find z-wave repair

what driver are you using for them? You may want to switch them to the following driver once you get them back online. Best method may be to power cycle them or reboot the hub (found in the Advanced Web App linked above).