Z-Wave Zooz ZST39 800LR model, USB-stick, - BRICKED - HELP!

No, they use the exact same driver software, Z-Wave JS, which is responsible for the firmware update. The difference is ZUI has extra features and an alternative UI. Plenty of users have had problems using ZUI to update firmware, you likely would have seen the problem there too.

It’s possible to flash the firmware in HAOS:

2 Likes