I’ve built my new Picade unit just a week ago, and I’ve been looking into doing a couple mods to it - namely adding in buttons for volume control. I noticed on the Hack Header, there are two additional button headers (BTN7 and BTN8), so I figured using these would be an easy mod. However, I’ve not been able to get Retropie to recognize any button presses from these headers (yes, I have wired to the Ground terminals as well). I ensured my button worked properly as I plugged it in one of the standard button headers (BTN6) and confirmed the button is good.
Has anyone successfully mapped these button headers to either execute a script or act as a keyboard button?