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what output signal type of PIR sensor?
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ok, if digital output signal, you can use any S1,S2,S3,S4 port. just S3 and S4 can use for long distance wire, support 300 meter wire. S1 and S2 is short distance.
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connect to S1 or S2, not use S3 and S4. S3 and S4 need voltage >6v is better.
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i think you can try to test, connect S1 or S2 to "GND" or to "3.3v", whether work well in esphome.
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how to wire this same PIR sensor on KC868-a16
3.3 v output