🔐 Keypad-Based Door Lock System (ESP32) 📌 Overview
A secure embedded system designed to control door access using a keypad-based password authentication mechanism. The system allows users to enter a password via keypad and grants or denies access accordingly using a servo motor.
🎯 Purpose
Provide a low-cost and secure access control system
Replace traditional lock systems with electronic authentication
Demonstrate practical implementation of embedded systems and security
⚙️ Components Used
ESP32 Microcontroller
4x4 Matrix Keypad
Servo Motor (Door Lock Mechanism)
LCD Display (16x2)
Buzzer
LEDs (Status Indicators)
Potentiometer (LCD contrast control)
Breadboard & Connecting Wires
🔧 Working Principle
User enters a password using the keypad
ESP32 processes the input and compares it with the stored password
If the password is correct:
Servo motor rotates to unlock the door
Green LED turns ON
LCD displays access granted
If the password is incorrect:
Buzzer alerts
Red LED turns ON
LCD displays access denied
🎥 Demonstration
(Add your project video here)
💡 Key Features
Password-based secure authentication
Real-time user input processing
Visual feedback via LCD
Audio and LED alerts for system status
Automated door locking mechanism
🧠 Learning Outcomes
Embedded system design and development
Hardware interfacing with ESP32
Keypad input handling and processing
Servo motor control and automation
Real-time system response and debugging
📌 Applications
Smart home security systems
Office access control
Locker security systems
IoT-based authentication systems
🚀 Conclusion
This project demonstrates practical implementation of embedded systems, user authentication, and hardware-based access control mechanisms, making it suitable for real-world security applications.