MFRC522 RFID Reader with Arduino

May 09,2020
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In this post, we will use the MFRC522 RFID Reader Module with Arduino to read the data from an RFID Tag.

Introduction -

RFID stands for radio-frequency identification. It uses radio wave(electromagnetic fields) to read the data stored in an RFID tag. An RFID system consists of two components :

1) RFID TAG - It contains a chip for storing the data and an antenna for receiving and transmitting the data.

RFID_KEY_TAG RFID_KEY_TAG_2

Card type RFID Tag Key chain type RFID card

2) RFID Reader - It works as a transceiver, it can transmit and receive data from the RFID tag.

RFID_MFRC522

Working -

The RFID Reader module generates a high-frequency electromagnetic signal, this EM wave signal induces an EMF in the RFID tag circuit which powers up the chip. The chip then alters the signal and produces a feedback signal that is received by the reader.

Paint_rfid

Components Required -

1. Arduino Board

2. MFRC522 RFID Reader Module ( RFID-RC522)

3. Connection wires

Connections -

1. 3.3V - 3.3V

2. RST - Pin 9

3. GND - GND

4. IRQ - No connection

5. MISO - Pin 12

6. MOSI - Pin 11

7. SCK - Pin 13

8. SDA - Pin 10

Note:- Do not connect the 3.3V pin to 5V.

Circuit Schematic -

BB_RFID

Schem_RFID

Reading Data from an RFID tag:-

In this example, we will be reading data from the RFID tag and then printing it in the serial monitor. First, we need to download and install the library for the module from the library manager in the Arduino ide, as shown below :

SS_RFID_1