I am unsure what happened here, just seeking to see if anyone has this same thermostat and it works for them. I transitioned from OZW to ZWaveJS in Feb. and it worked with my 2 thermostats. However, not sure how it happened or when but my thermostats stopped working through home assistant. They work inside ZWaveJS2MQTT server, but not inside Home Assistant.
I was going to open a github issue since I remember it worked before. However, I tried to regress my Home Assistant Core instance to find which version still worked, and I didn’t find any version working. I am currently on the latest (2021.2.3) and went as far back as 2021.2.0 (when ZWaveJS was introduced.
Here is how it looks inside Home Assistant
Device and Entities
My actual climate entity looks like this as unavailable.
Yet through the WebUI for ZwaveJS2MQTT I am still able to control the thermostat by sending mode commands and changes in temp. I initially added a ticket to ZwaveJS2MQTT and they punted it to being a Home Assistant issue not ZWaveJS issue.
github issue link: https://github.com/zwave-js/zwavejs2mqtt/issues/715