PS2 Controller


I am trying to use the PS2 Library by Bill Porter. I am able to load the example sketch onto my Arduino Uno for testing and it works great. I want to use a Pro Mini 5V so I can hide it in place of one of the vibration motors. I loaded the sketch onto the Pro Mini and wired it up just like the Uno, but now it just comes back with "Controller not recognized".

I went back to the Uno and it works just fine again.

Is there something I have to change to get it to work on the Pro Mini?