RFID Reader and Arduino

RFID Reader and Tag Identification Experiment

Introduction

This experiment demonstrates how to use an RFID reader and tag to identify and interact with objects. We will use an RFID module to read data from an RFID tag and display the tag's unique identifier on the serial monitor.

RFID Reader and Tag

Components Needed

Circuit Setup

  1. Connect the RFID reader's SDA pin to pin 10 on the Arduino.
  2. Connect the CLK pin to pin 13 on the Arduino.
  3. Connect the MISO pin to pin 12 on the Arduino.
  4. Connect the MOSI pin to pin 11 on the Arduino.
  5. Connect the RST pin to pin 9 on the Arduino.
  6. Connect the VCC pin to the 3.3V pin on the Arduino.
  7. Connect the GND pin to GND on the Arduino.

Ensure the RFID tag is held close to the reader to detect it properly.

RFID Circuit Setup

Code for RFID Tag Identification

Upload the following code to your Arduino to read RFID tag IDs:


#include 
#include 

#define SS_PIN 10
#define RST_PIN 9

MFRC522 rfid(SS_PIN, RST_PIN);

void setup() {
  Serial.begin(9600);
  SPI.begin();
  rfid.PCD_Init();
}

void loop() {
  if (rfid.PICC_IsNewCardPresent()) {
    if (rfid.PICC_ReadCardSerial()) {
      Serial.print("UID of the card: ");
      for (byte i = 0; i < rfid.uid.size; i++) {
        Serial.print(rfid.uid.uidByte[i], HEX);
        Serial.print(" ");
      }
      Serial.println();
      rfid.PICC_HaltA();
      rfid.PCD_StopCrypto1();
    }
  }
}

Explanation

The code reads the unique identifier (UID) from the RFID tag and displays it on the serial monitor. The key parts of the code include:

Troubleshooting