It was the diode. Put a 1N4007 on the valve and moved the relay to its own 5 V supply. The COM port hasn’t dropped once in two days and the reading stays around 405-415 when the valve switches. Also added the one second pause. Thanks!
It was the diode. Put a 1N4007 on the valve and moved the relay to its own 5 V supply. The COM port hasn’t dropped once in two days and the reading stays around 405-415 when the valve switches. Also added the one second pause. Thanks!