====== PN532 - NFC Reader Writer ======
 NFC RFID Wireless Reader Writer Module

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**Feature**
  * Gilt PCB and Small dimension and easy to embed into your project
  * Support I2C.SPI and HSU (High Speed UART), Change between those modes
  * Support RFID reading and writing; SupportP2P communication with peers; Support NFC with Android phone
  * Typical Operating Distance have been updated to 5cm~7cm reading distance
  * Work in NFC Mode or RFID reader/writer Mode
  * RFID reader/writer supports:
    * 1k, 4k, Ultralight, and DesFire cards
    * ISO/IEC 14443-4 cards such as CD97BX, CD light, Desfire, P5CN072 (SMX)
    * Innovision Jewel cards such as IRT5001 card
    * FeliCa cards such as RCS_860 and RCS_854
  * Plug and play, for compatible
  * Built in PCB Antenna, with 4cm~6cm communication distance
  * On-board level shifter, Standard 5V TTL for I2C and UART, 3.3V TTL SPI
  * Work as RFID reader/writer
  * Work as 1443-A card or a virtual card
  * Exchange data with other NFC devices such as smartphone