Green (A -, S -, or O -) White (amplifier+, signal+or output+) Black (excitation or GND) The weighing sensor is connected to HX711 using a four wire Wheatstone bridge configuration. These are usually colored RED, , , GRN, and . Each color corresponds to the conventional color code of the weighing sensor: Red (motivation+or VCC) Yellow (blocked), Manufacturer: PokFhgur