GPIO on Wrap.2c board
I have a Wrap.2c board from PCEngines. Nice board. It has a GPIO header that (from the website) cna be used to add an additional serial port. Has anyone done anything even remotely similar? I'm honestly just looking to turn on/off 3 pins on the GPIO header to turn on relays. I have gotten some information on this, but most of it seems to be too technical for me right now. Can anyone provide any "easier-to-read" information on this?
Thanks in advance!