Thermostatic plan

Hey!

I have a boiler downstairs in a closet, connected to a tado 24v thermostat in the living room at 1.5m height. on that place I will place a wall mounted tablet and remove the tado controller

Downstairs in the whole floor we have water floor heating, controlled by a regular thermostatic valve.

Upstairs we have multiple radiators, mostly one per room, also with regular thermostatic valves.

Now I want to replace all this with zigbee stuff so I can connect it to HA (I dont want Tado). I plan to use a zigbee controller in my boiler closet (i will control it by phone or on the wall mounted tablet.

What hardware do you advise? I live in Netherlands

I plan to use Sonoff thermostatic valves but am unsure about the controller?

Looking forward to your opinion

Well first you will have to find a device that can control your boiler. By that I mean to turn it on/off, set target temp, set hot water temp and that have a bunch of sensors to it.
That might not be an easy taks. You should look around if some myabe made some custom pcb controller for your boiler.
As for smart trv goes there are a lot of options out there. Everything that I tried and it is rated to work with zigbee 3.0 is working with ha.
I don’t know what you expect from your setup.