Security Door Unlock System Using RFID and Arduino Mega

Overview

This project is the final assignment for the Computer Laboratory 1 course. It involves the development of a security door unlock system using an Arduino Mega and an RFID card reader. The system reads the ID from an RFID card, and if the ID matches a predefined set of authorized IDs, it unlocks the door. This system can be used for secure access to rooms, such as those in hotels.

Table of Contents

• Project Description
• Hardware Requirements
• Software Requirements
• Installation
• Usage
• Contributing
• License

Project Description

The project uses an RFID reader connected to an Arduino Mega to read card IDs. When a card is scanned, the Arduino checks if the ID matches one of the authorized IDs stored in the system. If there is a match, the Arduino triggers a mechanism to unlock the door. This can be particularly useful in hotel room access systems, ensuring only authorized personnel or guests can enter.

Hardware Requirements

• Arduino Mega
• RFID Card Reader (e.g., MFRC522)
• RFID Cards or Tags
• Relay Module (for controlling door lock mechanism)
• Door Lock Mechanism (e.g., electromagnetic lock or servo motor)
• Jumper Wires
• Breadboard (optional)

Software Requirements

• Arduino IDE
• MFRC522 Library (for RFID reader)
• Additional Libraries: SPI.h, MFRC522.h

Installation

Install Arduino IDE

Download and install the Arduino IDE from here.

Install Required Libraries

Open the Arduino IDE, go to Sketch > Include Library > Manage Libraries. Search for and install the following libraries:

• MFRC522

Upload the Code

1. Connect your Arduino Mega to your computer.
2. Open the security_door_unlock.ino file in the Arduino IDE.
3. Select the correct board and port from Tools > Board and Tools > Port.
4. Click the upload button to upload the code to the Arduino Mega.

Usage

Connect the Hardware

Connect the RFID reader to the Arduino Mega as follows:

• SDA to pin 53
• SCK to pin 52
• MOSI to pin 51
• MISO to pin 50
• IRQ to pin 2
• GND to GND
• RST to pin 9
• 3.3V to 3.3V

Connect the relay module to a digital pin (e.g., pin 7) to control the door lock mechanism.

Connect the door lock mechanism to the relay module.

Power the System

Provide power to the Arduino Mega and other components.

Authorize RFID Cards

Update the code with the authorized card IDs in the authorized_ids array.

Scan RFID Cards

Scan an RFID card near the RFID reader. If the card ID is authorized, the door will unlock.

Contributing

Contributions are welcome! Please follow these steps to contribute:

1. Fork the repository.
2. Create a new branch (git checkout -b feature/your-feature-name).
3. Make your changes.
4. Commit your changes (git commit -m 'Add some feature').
5. Push to the branch (git push origin feature/your-feature-name).
6. Open a pull request.

License

This project is licensed under the MIT License - see the LICENSE file for details.