i am using a Netatmo Smart Thermostat for quite a while now with my heating, but now wanted to install
those new radiator valves.
But i'd need at least seven of those for my flat, but while the app tells me i could at most install five of those.

What could i do? Would i really need to buy a newer Smart Thermostat just to be able to use more of those valves?
Or is there a way to upgrade the older smart Thermostats somehow?
Thanks,
Frank