====== Adafruit PN532 RFID Breakout Board with ESP32 ======

  * NXP PN532 Datasheet: {{https://www.nxp.com/docs/en/nxp/data-sheets/PN532_C1.pdf}} 



| {{https://cdn-learn.adafruit.com/assets/assets/000/002/710/original/rfid___nfc_ID789_LRG.jpg?600&direct}} |
| Source: https://learn.adafruit.com/adafruit-pn532-rfid-nfc?view=all | 

| {{https://cdn-learn.adafruit.com/assets/assets/000/026/820/original/rfid___nfc_pn532_16.png?600&direct}} |
| Source: https://learn.adafruit.com/adafruit-pn532-rfid-nfc/downloads |


===== Serial Interface Signals =====

^ SPI        ^ I2C  ^ UART  ^
| SCK        |      |       |
| MISO       |      |       |
| MOSI       | SDA  | TX    |
| NSS        | SCL  | RX    |
^  Common                 ^^^
|  IRQ                    |||
|  RSTOUT_N               |||
|  VDD/3.3V               |||
|  GND                    |||

 
===== Antenna Design =====

  * Adafruit: https://cdn-shop.adafruit.com/datasheets/PN532_AntennaDesign_v1.0.pdf
  * :!: NXP AN1445 + Excel Sheet to optimize antenna: https://www.nxp.com/docs/en/application-note/AN1445_An1444.zip