When I used these thermostatic heads (for a few years), I controlled everything via Gladys or sometimes via the Zigbee2Mqtt service interface to validate.
Here’s the exact model: Têtes Thermostatiques connectées - Compte rendu de mes recherches - #26 par lmilcent
From Gladys’ interface, you can add the temperature and the head’s state to the dashboard. You’ll quickly see if the connected head is in heating mode (it lets water pass through the radiator) and, if so, at what opening percentage.
You’ll also have the temperature measured by the head, right next to the radiator.
And finally, if you want to verify that this is indeed the case, the Zigbee2MQTT component interface is available by default at http://ip-de-gladys:8080 (Gladys’ port 8080).
I recommend sticking with the Zigbee protocol; it’s the most affordable, widespread, and convenient 