Allow users to group together TRVs in different rooms
The fact that we can use IFTTT, Google Home , and some homeassistant features to do this tells me it cant be that difficult.
Most houses in the UK have 2 floors - upstairs and downstairs.
Most of us want to heat only the upstairs at night when we are going to be there, and the downstairs in the day.
Currently I have TRVs on all my radiators (8) so if I want to make upstairs hotter I need to click on 4 different tiles in the app and set a temp/time - this is really difficult and quite frankly a pain in the butt.
It is surely not that difficult to allow us to just send a command 'set upstairs to 22 degrees for 2 hours' via your app and it really isnt right to be leaving this to third party developers as it really cant be that difficult to do.