This library allows you to encode and decode Tamagotchi Pix Tama Codes as binary. You can decode the bytes from a scanned Tama Code, or encode a Tama Code representation to bytes that you can then generate a QR code from. The included test app serves as a demo of how to use the library.
To decode Tama Codes, you will need to supply it to the test app as a hex, because it cannot access the camera. I suggest using Binary Eye on Android as it actually shows you the hex code rather than try to display it as text.