RFID_arduino
RFID 项目
* 配置
* +-----------------+-------------+
* | RFID RC522 PIN | ARDUINO UNO |
* +-----------------+-------------+
* | SDA | 10 |
* | SCK | 13 |
* | MOSI | 11 |
* | MISO | 12 |
* | IRQ | UNUSED |
* | GND | GND |
* | RST | 9 |
* | 3.3V | 3.3V |
* +-----------------+-------------+