Now, you're going to have to decide which muscles/muscle combos you want to use for your button(s) layout. We've opted to go with the following layout. If you want to go with a different layout, you'll have to make some modifications to the Arduino code we'll get to later on.
Function buttons: Button A --> Right forearm muscle Button B --> Left forearm muscle Start Button --> Not muscle controlled Select Button --> Not muscle controlled
Directonal pad: Right --> Right bicep muscle Left --> Left bicep muscle Up --> All four muscles (combo) Down --> Left and right bicep muscles (combo)