Hi David,
If I understand you correctly, your desire would be to have “nodes” with a very low consumption to operate them with batteries. But, for what? I mean, to use it as… remote thermostat for individual radiators maybe?
To have individual controllers for the radiators is an idea that I had already in the past, but my knowledge in electronics is not enough. I developed the original app in 2013 for my personal use in Spain, where normally a little house has only one thermostat on the wall in the main room.
Now I’m living in NRW – Germany, and I realized that there is not only one thermostat on the wall. There are many, one on each radiator. I dismantled one of them, and I thought it was too much for my knowledge. Besides that, the actually app can not control multiple relays. It should be adapted. It is not impossible, and not very difficult, but it requires work (a lot of hours of work).
Do you think that it may be possible to buy all the components for the radiator thermostat and only have to mount it? Or do we need to print ourselves the parts?
Greets from Leverkusen!
Roque.