My setup rp1 with gpio adapter and snes controller(retropie 3.0). all works fine. Now i want more power and so i bought a rp2. install retropie 3.0 and plug in my gpio adapter. install the snesdev driver. he said “2 controllers was found” but nothing works.
Try all buttons on both controllers to see if any register. I had an issue a while ago where only 1 button would register. The problem was related to either my latch or clock wire, I don’t remember which.