This is a Raspberry Pi NFC HAT based on PN532 operating in the 13.56MHz frequency range. It supports three communication interfaces: I2C, SPI, and UART. NFC (Near Field Communication) is a wireless technology allows contactless point-to-point data communication between devices within a short distance of 10 cm. It is widely used in applications such as access control system, smart tickets, meal card, etc. Based on the popular NFC controller PN532 with multi interface options, this HAT will easily enable NFC function for your Raspberry Pi. Features Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards Onboard PN532 chip, supports various NFC/RFID cards like MIFARE/NTAG2xx, etc. Three interface options: I2C, SPI, and UART, configured via jumpers and switches Breakout control pins, for easily connecting with host boards like STM32/Arduino Comes with development resources and manual (examples for Raspberry Python/C, STM32, Arduino) Specifications NFC controller: PN532 Operating voltage: 3.3V/5V Operating frequency: 13.56MHz Communication interfaces: I2C, SPI, UART (default) Default baudrate: 115200 bps Operating modes: reader/writer mode supporting ISO/IEC 14443A / MIFARE scheme reader/writer mode supporting FeliCa scheme reader/writer mode supporting ISO/IEC 14443B scheme card operation mode supporting ISO 14443A / MIFARE scheme card operation mode supporting FeliCa scheme card operation mode supporting ISO/IEC18092, ECM340 point-to-point Applications Contactless payment system Bluetooth and WiFi devices chaining Social sharing function like sharing contacts, photos, and videos Smart phone NFC app What's on Board Raspberry Pi GPIO connector: for connecting with Raspberry Pi PN532 control pins: for connecting with other host boards like STM32 NFC induction coil PN532 chip: NFC controller Power indicator DIP switches: for configuring the connection between PN532 and Raspberry Pi (only one of the I2C/SPI/UART can be connected at the same time) Mode selection: I0-L, I1-L: enable UART I0-H, I1-L: enable I2C I0-L, I1-H: enable SPI INT0 jumper: response signal, connects to Raspberry Pi D16 RSTPDN jumper: reset signal, connects to Raspberry Pi D20 Dimensions
