The Smart Thermostat can switch heating on and off if it is connected to the heat generator via dry contact (TA); if it is connected to a heat pump or fan coil, it can also manage cooling (summer mode).
From the thermostat's display, it is possible to scroll through the rooms in the system, and change setpoints; via the app, on the other hand, it is possible to select the rooms that will activate the relay (if the thermostat is wired), and set time slots.
To configure the Smart Thermostat, read here.