I would like to create a solution (Probably with Arduino) to control my AC remotelly.
Opening my thermostat and doing some tests I got these values bellow:
Blue (C) - Neutral (AC) Red (R) - Phase 28v (AC) Just Fan - Green (G) 28v AC On Running - Green (G) 28v - Yellow (Y) 28v - Orange (O/B) 28v AC On Not Running - Orange (O/B) 28v - Yellow (Y) 0v Heat On Running - Green (G) 28v - Yellow (Y) 28v - Orange (O/B) 0v Heat On Not Running - All 0v Orange (O/B) - If high (28v) is cold mode - If low (0v) is heat mode Yellow (Y) - If high with Green (G), AC is running (cold or heat) - If low with Green (G) high, just fan is running - If low with Green (G) low, AC is off
Is it possible to control my AC just joining these wires
- Join green and red wires and just fan turns on.
Thank you and sorry any english mistake.