I'm building a floor heating control with raspberry pis. Until now I have two Pis working, one which controls the valves via relays and another which works as "central" with a webinterface to adjust the roomtemperature and as the sensor for the livingroom. Now I want to split everything, that I have:
1 Pi to control the valves (existing)
1 Pi as a central to control all the rooms, with a temperature-curve for the last 1-3 days or something + the data of the (still to build) wheaterstation
3-4 Pis (each for one room) for the on-site measurement and manual adjustment (small LCDs)
So far there's no problem. At the moment, in this try-out state, I'm using UDP to transmit the actual value and setpoint from one Pi to the other (which switches accordingly the valve and creates a CSV log) via WiFi. But now I want to have a "sensor" for each room and e central with more and visual information. So I'm asking you, what is the easiest way to realize that. Via a central file on a NAS or a central file on the central Pi. Further I'd appriciate some solution ideas for this. Maybe someone has already done something similar? Thanks in advance!