Thank you Nefsoliove, i've just tried to order one and they are orderable but have none in stock.

Could you not use a basic "On/Off Room Thermostat", disconnect the rotary thermostat and connect a BDR91 in it's place?
Without a wiring diagram for the boiler and knowing how Buderus control the boilers it's difficult to comment.

Agree but from the manufacturers website "RFXtrx433XL not available. Unknown if or when a new product becomes available." I can't find any for sale anywhere so I've messages the manufacturer. If anyone has alternate suggestions or for a replacement for the RFXtrx433XL I would be very grateful.

I have a need to monitor three power consumption values within a single consumer unit. I've used Owl devices in the past and my first thought was to use these but I don't have an RFXtrx433XL USB HA and they appear to be unavailable everywhere. Ideally I'd like a solution that uses clamp sensors that ...

I'm a relative new comer to Domoticz and would like some advice. Currently I have a Domoticz server running in Linux thats hosted as a virtual machine on a home server. I have two Honeywell EvoHome central heating controllers attached and logging fine. I have solid 2.4G & 5G WiFi across all our ...

Rob,

Thank you for this, high quality 5V isn't an issue and I guess I could get the Wemos D1 to drive a dispaly so the NTC's are only connected to the D1.
Cheers for the pointer.
Best get a board ordered and start playing unless there are any other suggestions?

Hello, I'm new to the site so be gentle! I have 3x NTC Thermistors buried inside an external pipe that measure the surface temp, internal air space temp and the temp of the surface of an insulated cold water pipe. These are currently connected to digital readouts but I would lie to log these in ...