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Phantom interrupts from a long cable

A door sensor on a 10 m cable triggers a falling-edge interrupt several times a day with nobody near the door. What is the most robust fix?

A.Switch the interrupt to rising-edge only so the noise is ignoredB.Remove the pull-up so the input can float with the long cableC.Raise the GPIO output speed setting so the edges are cleanerD.Add an RC filter and stronger pull-up, then confirm the level in software

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Phantom interrupts from a long cable

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