Hardware to control a heat pump

I want to extend my emonpi and try to get a better control about my heat pump. It’s consuming too much energy and I want to write my own software based on the temperatures.

First thing are another 6 temperature sensors. I’m not so familar with the hardware, so I want to ask if the following modules will work together or if there is a better option.

RPI2 v2 1-Wire Host Adapter for Raspberry Pi
SWE2b Sensor Connection Module
SWE0a Temperature Sensor SWE0a Temperature Sensor

The second is a relay to switch on/off the pumps.

I found this one:

Raspberry Pi Relay Board v1.0


Can some one give me an OK for the compatibility of these products please?


I’d be inclined to use a SonoffPOW (I tend to buy my direct from Itead) for controlling on/off as it will also give you power readings. Flash it with Tasmota and you have a really flexible system.

There are 2 versions of the POW, series 1 and R2. The series 1 may be ok for your needs.

Sounds interesting. But more expensive than a raspberry board. There is a module with 4 relays availible, too.
There are so many possibilities…

Do you need more than one relay? If not, how is it more expensive? It is also simpler as you do not need a Pi nearby nor need to power the Pi.

Is it a 13A supply? I just cut the cable to the plug and insert the SonoffPOW. Easily isolated then if required.

That sounds indeed as an easy solution. I forgot to tell that there are three pumps which I like to control. I will use contactors for the three phases of the heat pump, so I have to install some hardware anyway.

The greater question are the additional temperature readings…