Home electrical circuit monitor?
I'm looking for something that is able to determine if an electrical single is present or not through Linux perferrably.
The senerio I'm trying to figure out... I have a hydronic heating system and I want to be able to do some kind of reporting to which zones are requesting heat (I have 3 zones) and at which time of day, also comparitive to the temperature outside.
So, in the simplest broken down form, I just need a way to determine if the zone sensor is on, or if a signal has been sent to it. I know the voltage (24v) of the circuit and I have the temperature thing already solved.
Most of this is done in perl, I just don't have a way to get the information to the system that the zone has been tripped by the thermostat.
So does anyone know of a way to determine or watch a eletrical circuit or query if the circuit is powered in Linux?