Smart Thermostatic Radiator Valves (eTRV's by MiHome) following Nest Thermostat

Hi, there is already an app for that based on the concepts of rooms/zones/schedules.

You can elect the Nest to be the master thermostat and all your eTRVs will follow its mode (cool, heat, eco, off) and its setpoints.

You can even turn on/off your eTRVs automatically according to your scheduled zones.

Refer to this thread:

All the use cases are described at the ST community wiki:

http://thingsthataresmart.wiki/index.php?title=ScheduleTstatZones#Configuration

The code is available for download at:

www.ecomatiqhomes.com/store

P.S. I’d recommend this Nest implementation to take advantage of all the ST standard capabilities and its resilience under any ST or Nest outages:

So, you should choose the Nest bundle at my store (which includes My Next Tstat and the ScheduleTstatZones smartapp).
Regards.