Objective

This experiment demonstrates how to use an RFID reader to read RFID tags and cards.

Components Required

• RFID Reader
• RFID Card
• Arduino Board (e.g., Arduino Uno)
• Jumper wires
• Breadboard

No Ads Available.

Working Principle

The RFID reader emits a radio frequency signal that is used to read data from an RFID card. The card responds with its unique ID, which can be read by the Arduino.

Code

/*
 * RFID Card Reading Experiment
 * This code reads the unique ID from an RFID card.
 */

#include 
#include 

#define SS_PIN 10
#define RST_PIN 9

MFRC522 mfrc522(SS_PIN, RST_PIN);  // Create MFRC522 instance

void setup() {
  Serial.begin(9600);  // Initialize serial communication
  SPI.begin();  // Initialize SPI bus
  mfrc522.PCD_Init();  // Initialize RFID reader
}

void loop() {
  if (mfrc522.PICC_IsNewCardPresent()) {
    if (mfrc522.PICC_ReadCardSerial()) {
      Serial.print("Card UID: ");
      for (byte i = 0; i < mfrc522.uid.size; i++) {
        Serial.print(mfrc522.uid.uidByte[i], HEX);
        Serial.print(" ");
      }
      Serial.println();
    }
  }
}
            

Results

The serial monitor will display the unique ID of the scanned RFID card.

Applications

• Access control systems
• Inventory management
• RFID-based authentication systems