How to configure of Zigbee Smart Thermostat in HA?

Hello all,
I have a Moes Smart Thermostat I got from the jungle site. The type I got is GC - for water/gas boiler.

After struggling with the wiring as I described in this other thread, I managed to get it working. Well, sort of…

I have 8 thermostatic radiator valves from Sonoff around the house and they are all connected to my home assistant instance. I have not done much automation yet, bar one in kitchen to switch on and off at specific times. I think it is working fine, but the batteries are being drained like crazy. I suspect it has something to do with a faulty unit rather than a a drain due the automation. This is not what I want to address in this thread.

My issue is that the Moes thermostat keeps resetting to 5C. I set it 20C to fire up the boiler, but quite often it will be reset to 5C again.

I want to control it via HA, rather than the controls on the unit or via the phone app. I’m not an expert in HA and I’m happy to provide debug info.

Is there any tutorial around I can follow?

Cheers,

Looks like the thermostat is in “auto” and “anti-freeze” mode, isn’t it?
Not even going to zigbee, that’s something you should be able to program on the device itself.
As far as going to zigbee, what does HA sees as entities from the device?