From GameBrew - a wiki dedicated to Video Game Homebrew.
An UID Reader for N3DS!
Currently only reads 0x4 UID's, most common RFID tags use this length for their UID's.
Possible future additions:
1. List of recently scanned UID's
2. Save UID's to file immeditaly (.txt)
3. Read out .txt with UID's and display this list on screen.
This release is a fully(?) functional UID scanner for 3DS.
Note: Currently scans 0x4 UID's. If wanted future releases may include support for longer UID's (like 0x7 amiibo UID's).