Equipment:
- Z-Wave controller Zooz ZST39 LR
- Insteon USB Modem
- Home Assistant Yellow PoE
In case this helps anyone else. I had a really big problem with my Zooz ZST39 LR frequently locking up. I noticed there was power bleeding from the Insteon modem into the USB bus. (I only noticed because the LED would blink when there was no PoE going to the device.)
Fast forward: I placed a couple of USB testers between the Zooz controller and the Insteon Modem in the hopes that it would use up any power bleeding before it could get to the Zooz controller. Well, that did the trick. The Z-Wave controller has been rock stable for weeks now with that small change.
It’s not the most elegant fix, but it does seem to do the trick. Sharing this in case anyone else is having Z-Wave lock ups and using a USB Insteon modem.