Connect a Raspberry Pi GPIO to another Pi GPIO? - Raspberry Pi Forums

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is possible have 2 pi's signal each other through gpio connectors?

imagine wiring be:

connect gpio grounds each other.

example have gpio 4 on pi-one set input.

gpio 4 on pi-two set output, high or low.

connect both gpio 4's together.

1 pi go high or low, , other pi read high or low.

work?

don't want damage 2 pi's trying : p

yes, that'll work. doesn't have gpio4 gpio4, can 2 gpios. doesn't have on different pi, use gpio4 send signals gpio17 (for instance) on same pi.


raspberrypi



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