Quote:
Originally Posted by Slothbron
Ok so we have a pwm cable coming from the spike relay of the air compressor to relay spot 1 on the sidecar. Then the pressure switch is wired to the DIO spot 1 on the sidecar. Specifically the signal pin and + pin.
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For a switch input to be read by the program, you need to use the signal pin and the ground (-) pin. The Digital Sidecar inputs are already at +5 volts when nothing is connected to them. You have to pull them low in order to register a change.