I am searching for a battery-powered thermostat for cooling which can start my cooling system. I have a potential free on/off two wires. Currently, I have an old analog one which switches on when temp is below the one that is set. I want to replace it with one with a display for manual operation and in parallel through HASS.
Network can be WiFI or Z-Wave.
As I don’t have a power line on the wall outlet, It must be powered by batteries.
Any experience and proposals are welcome.
Thanks,
Goran
Alternately build something with an ESP-01 and some sort of latching relay that is only awake for a few seconds every couple of minutes and in deep sleep the rest of the time.