NFC芯片 PN532的命令代码，比较简单，可以用作测试-PN532 NFC chip command code, is relatively simple, it can be used as a test

在Arduino环境下使用PN532的说明及代码参考，可以作为使用的参考-Use PN532 described in the Arduino environment and code reference, it can be used as a reference