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I tried power 1 and 2 and 3.3V with GPIO ground to pin 9. When I start the server only a few relays light up and switch on (1,2,3,5,6,8). That tells me the default voltages for those switches are set high? Not sure why it just has a few switching on and not all as I follow the mapping.. There is a jumper on the relay board that is set to VCC-JD I will try setting it to JD-VCC instead. Nope. I will keep trying. Checking and rechecking.