The PN523 Near Field Communication (NFC) reader/writer is based on the NXP PN532 chip, and is capable of reading and writing to all NFC compliant RFID tags, as well as Mifare Classic tags like the Mifare S50 based xM1. It also supports the NFC peer-to-peer standard, so two of these devices can talk to each other, or you can set up a peer session with a mobile phone. The board also has several switch-selectable I/O modes including I2C, SPI, and HSU (high-speed UART).
3 basic example of this module
Read/write RFID card
As basic function, this module could read and write RFID card. Various cards could be supported
Two peer PN532 modules could communicate with each other
NFC with Andriod Phone
The basic communication stamp with Andriod Phone (NFC supported) is finished
The I2C and HSU shares the same pins. The definition of IIC pins is printed at front and the HSU’s is printed at the back. The HSU mode is configured as the default mode. But you could change the interface by setting the toggle switch.
Arduino library for PN532
Manual from DangerousThings
Tags: RFID Reader