I guess it is not possible - Search questions returning 'undefined' · Issue #9 · googlesamples/assistant-sdk-nodejs · GitHub
Using the python assistant SDK library and the Display parameter I’m able to get html response and inside there are information about thermostat. The strange thing is it return the thermostat state ( hot, cold) and the target temperature but not the internal temperature. But in Google Home app the internal temperature is showed…
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Update: this is now built in to home assistant