ID-12 programming help

Thougth the reason people weren't posting is because it was in the wrong thread.
Didnt realize it hadn't been exaclty 24 hours.

When you scan a card you can't print it to serial because it's in byte code. Nothing pops up or weird symbols do. How can I scan a card to determine its code and then make variables accordingly to check for it and compare it to whatever card is scanned?