NFC Shield
The Seeed Studio NFC Shield is a NFC card reader module for Arduino and Raspberry Pi. It has a high-performance chip, the PN532, which makes it easy to read and write NFC Tags/Cards/Stickers. This module is compatible with almost all types of wireless communication technologies including Mifare, FeliCa, and ISO14443A. The module supports different modes such as read/write, SNEP, P2P, Network emulation, and card emulation. The NFC Shield also has an onboard LED that indicates various status, and it can read the UID (Unique ID) of the chip or card that is placed near it. It also supports RFID features like RTC and sleep mode.