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When connected to your Raspberry Pi (or
compatible board) via flat/ribbon cable the GPIO pin
numbers corresponding to relays 1-4 are: 16, 17, 22,
23. You must configure these GPIO’s
for output in
order to control the relays.
For code examples and more info please visit
https://qec.company/products/eas-rel-4
* Raspberry Pi is a trademark of Raspberry Pi Trading