I have purchased a Horizon ring with 2 x NFC chips. My hope was to copy my work access card (4 byte Mifare classic) onto one chip and my work printer NFC credential (7 byte Mifare ultralight) onto the second chip. I have also bought an Arduino Mega 2560 (clone) and an Elechouse PN532 RFID reader.
I can read the UID details for the two credentials, but have no idea how to store the information and then write to the ring (or even whether it is possible as I understand the ring has 2 x 7 byte chips).
So;
- Is it possible?
- Where can I get the necessary Arduino sketch?
- How do I use it?
Many thanks to any help provided.