The virtual thermostat inbuilt to HE has too much intelligence inbuilt and will interact with the remote MQTT thermostat in undesireable ways. Instead you should use the 'remote thermostat' driver that I have created and will be available in beta 3e . It has no intelligence at all so accurately represents and controls a remote thermostat. It maybe that you would want to pre test this ?
Also this is an OLD thread (I know you were replying to a post within) but the current thread is here
