This product is open source! Various bits of the code have different licenses applied. Anything SparkFun wrote is beerware; if you see me (or any other SparkFun employee) at the local, and you've ...

Arduino RFID/NFC Library for NXP NTAG 424 DNA tags using MFRC522. Read and write a NTAG 424 DNA card or tag. Plain, Mac and Full communication modes supported. LRP and SDM not yet supported. Warning!