Boiler control - theta RFF EBV

[AchilleTalon]

Hello all,

I've been around for a few years, happy with my domoticz setup. I just moved to a new house where I'd like to take care of my boiler.

All the radiators have thermostatic knobs that I replaced with Shelly TRVs (working great so far).

The boiler comes with a room sensor (theta RFF EBV) that acts as a thermal probe and an programmer. Here is a picture:

rotex_commande.jpg (66.33 KiB) Viewed 1601 times

It communicates with the boiler through a 2-wire bus.

Anyone has an idea on how to connect this to domoticz (or replace it with something that could) ?

Thanks in advance for you inputs and comments.

[willemd]

I guess it is not Opentherm compatible? If it is compatible you could use a Opentherm Gateway, but I don't see it on the list.
https://otgw.tclcode.com/matrix.cgi#boilers
https://otgw.tclcode.com/matrix.cgi#thermostats

[waltervl]

Only thing I can find is this: https://github.com/phiresky/ebv-theta-to-mqtt

It needs some diy wiring. It publishes MQTT Auto discover messages so it is compatible with Domoticz.

[AchilleTalon]

Thank you VERY MUCH @willemd and @watervl.

I'll look into your suggestions.