Week 5: MFRC522

MFRC522

RFID (Radio-Frequency Identification) is commonly used in security systems such as door locks. Here, I use the MFRC522 chip that come with a RFID card. The MFRC522 RFID communicates with cards or tags up to 1cm using a 13.56MHz electromagnetic field, then sends the data to Arduino board through SPI communication.

Below is the connection between Arduino and MFRC522 RFID Reader.

RC522 Module       Arduino Uno
       SDA                       D10
       SCK                       D13
      MOSI                      D11
      MISO                      D12
        PQ                Not connected
       GND                     GND
       RST                        D9
       3.3V                       3.3V