I have the above device which worked well with HA when first installed, it was one of four. I had to remove this one from HA and when I replaced the battery and tried to reinstall it, the device flashed as normal, it was recognised and started Configuration, but it just hung there. I left it overnight but still not seen or installed - any ideas what could be wrong…? Many thanks.
Hi John, this device does not have a good reputation. (Search results for 'snzb-03' - Home Assistant Community)
I have a few of those too and in the end they are not worth it.