I’m planning to asses the performance of my electric water heater the EmonPi with single phase power metering at my house panel. However, the additional provision I want to do is measure the voltage of my thermostat in an attempt to estimate the internal water temperature. I’ll be doing this via a relation using ohm/temperature tables. My question is, how can I left the CT clamp measure and show voltage or resistance readings of my desired circuit?
I’m a newbie so sorry if I missed anything.