Electrodragon relay board with Cloudmqtt
This was just a project made out of desperate situation caused by mistakes in heating system design. So my friend needed to be able to control the pump which pushes the heat towards one f the branches, for a while and also being able to turn it on/off, get some feedback etc. So far they like it and this copy/paste coding style worked for us.
& This code here (which is actually simply very quick drag and drop from other projects :D):