I have a thermostat connected to HA using zigbee. I can see see correctly the current temperature value and state and they are immediately updated when I change them on the thermostat, but if I change value in HA, they are not updated on thermostat.
My thermostat is almost this one. it has the same Zigbee ID, but another brand Saswell eTRV+ Radiator Valve SEA802-Zigbee Zigbee compatibility