I have 8 thermostats across the house directly connected to thermal actuators which controls floor heating. The problem is that thermostat send 230v to actuator L wire when it needs to be opened. What I need to do is to check if all actuators are closed or not and disable heating function on my heating unit (thats the easy part).
I would like to avoid using anything like capacitors, optocouplers and etc, because I do not have required knowledge how to use it properly.
It would be great if I could use some kind of 230V relay and read its status if it is opened or closed.
Thanks, another solution which I've found is to use AC->DC 5v converters for each actuator and connect it to arduino digital pins. Found few models with small size.
Not sure which one is better, relay solution seems to be more safe
