RFID with Arduino
Introduction (How it Works)
Mifare RC522 is the highly integrated RFID card reader which works on non-contact 13.56mhz communication, is a low power consumption, low cost, and compact size read and write chip, is the best choice in the development of smart meters and portable hand-held devices.
Required Hardware
For this module you will need:
- Arduino Uno
- MF-RC522 RFID sensor
- Female to male jumper wires
Wiring
Connect the sensor as described below.
| Pin | Wiring to Arduino Uno |
| SDA | Digital 10 |
| SCK | Digital 13 |
| MOSI | Digital 11 |
| MISO | Digital 12 |
| IRQ | unconnected |
| GND | GND |
| RST | Digital 9 |
| 3.3V | 3.3V |
Code
On your PC, Download and install the Arduino IDE from here.
- Download the RFID library here created by Miguel Balboa
- Unzip the RFID library
- Install the RFID library in your Arduino IDE
- Restart your Arduino IDE
Now, in the Arduino IDE, Go to File —> Examples –> MFRC522 —> dumpinfo
Connect your Arduino with a USB cable to your PC and upload the code to your Arduino UNO. Open up the serial monitor from tools —> serial monitor and now as soon an RFID it would show up on the serial monitor. Voila! The project is now complete.
