Start at the beginning, why do you want a wall thermostat, and what do you expect it to do?
Analogue thermostats are clearly better than digital, however the length of the off/on period can mean digital can in some cases control as well as analogue, but may use more fuel as the digital thermostat can mess up the boilers modulation sequence.
I see Modbus marked on the thermostat but not a clue how Modbus works and if also is there Modbus on the boiler? Basic idea with modern boilers is they don't turn off/on but up down, that is why the thermostat connects to the boiler bus rather than simply off/on. And before switching a boiler off it needs to cool and an off/on thermostat simply does not do that.
Many systems use the thermostatic radiator valve (TRV) to control room temperature, however your wall thermostat seems to have sensors to compensate for weather, however it does not seem to link to the TRV's.
To my mind the whole idea is to have a single heat producing unit (boiler) but retain individual control of each room, with an inhibit to stop boiler when good weather is likely, the latter with my system is manual, however no one can advise what you should do until they know what your aim is. And of course what the boiler and thermostat is able to do.