Hi, Sorry you are having problems, lets see if we can 'debug' your issue. First can you take a picture of the wires connected to the pins and post it so I can check if you have the right pins.
Also, whenyou shut off the Piper, don't just press the button on the battery. You should always try to use the Pi's (that is the computer running Piper) normal shutdown procedure. If you plug in a USB keyboard, you can hit the escape key and then move the screen down till you see the top menu. Right click the itemd labeled 'HUD' and 'Minecraft - Pi edition' and select 'Close window'. Then using the left most icon, select shutdown.
Normally when you are in teh game and complete a level you can go back to the main menu and select shutdown from it.
ALWAYS wait 30 seconds before shutting off the power so the computer can clean up after itself.
I'll wait to hear from you.