I think I already had it assigned, I’ll check that. If it is still acting up I might just reinstall the os and reef-pi .my setup is fairly simple atm, just relay control and a button to trigger a macro for feeding time.I came across that, it seems the Pi is doing something with that pin causing it to go low and high, if you assign it as a piece of equipment it should stop as reef-pi will control it at that point. When the Pi starts that pin will always switch once until reef-pi actually gets running so if that's a problem use a different pin.