I want to trigger both a GPIO pin on an ESP32 and an optocoupler relay by using just one ground signal. Is it possible to hard wire the GPIO input pin to the input of the relay, and then ground that connection when I want them both to trigger? Otherwise would I have to add a separate GPIO output t…

Triggering ESP32 and Optocoupler together

high_impact September 1, 2025, 7:30pm 3

See diagram. Not a regular relay.

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