Introduction

This experiment demonstrates how to create an access control system using an RFID module and Arduino.

Components Needed

• RFID Module
• Arduino
• RFID Tag
• Jumper Wires

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Circuit Setup

1. Connect the RFID module to the Arduino using the specified pins (typically VCC, GND, SDA, SCL).
2. Ensure the RFID tag is available for testing the access control.

The RFID module will read the tag data to allow or deny access based on the programmed tags.

Code for RFID Access Control

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

#include 
#include 

#define SS_PIN 10
#define RST_PIN 9

MFRC522 mfrc522(SS_PIN, RST_PIN);

void setup() {
  Serial.begin(9600);
  SPI.begin();
  mfrc522.PCD_Init();
}

void loop() {
  if (mfrc522.PICC_IsNewCardPresent()) {
    if (mfrc522.PICC_ReadCardSerial()) {
      Serial.println("RFID tag detected!");
      // Access granted logic here
    }
  }
}
            

Explanation

The RFID system reads the unique ID from the RFID tag and compares it with a stored ID. If the ID matches, access is granted, otherwise, access is denied.

Troubleshooting

• If the RFID tag is not detected, ensure the wiring is correct and the tag is properly placed within the sensor's range.
• Ensure that the MFRC522 library is properly installed in the Arduino IDE.