Dynamic Password Generation for Safe Lock System

Project Description

This is a comprehensive IoT-based safe lock system that combines motion detection, dynamic OTP generation, keypad authentication, and CCTV monitoring. The system is designed for power efficiency and security, using a Raspberry Pi as the central controller.

• Motion Detection: Uses an IR sensor to detect movement and automatically activate the system
• Dynamic OTP Generation: Generates random 7-character OTPs that change every 30 seconds
• Web-based OTP Display: Hosts a Flask server to display the current OTP via web interface
• IP-based Access Control: Restricts OTP access to whitelisted IP addresses only
• Keypad Authentication: 4x4 matrix keypad for OTP input
• Servo Motor Control: Automatically opens/closes a gate/lock mechanism
• CCTV Integration: Records video from a smartphone camera for surveillance

workings :

1. Power-Efficient Activation: The IR sensor continuously monitors for motion. When detected, it triggers the Flask server for 30 seconds
2. OTP Generation: A background thread generates random 7-character OTPs using characters 0-9 and A-D
3. Web Interface: The Flask server displays the current OTP on a web page accessible only to whitelisted IPs
4. User Authentication: Users enter the OTP via the 4x4 keypad
5. Access Control: If the OTP matches, the servo motor rotates to open the gate for 30 seconds
6. CCTV Recording: A separate script records video from a smartphone camera in 20-second intervals

Dependencies

Hardware Requirements:

• Raspberry Pi (any model with GPIO pins)
• IR sensor (motion detection)
• 4x4 matrix keypad
• Servo motor
• Smartphone (for CCTV functionality)
• Jumper wires and breadboard

Software Dependencies:

Flask==2.0.1
RPi.GPIO==0.7.1
opencv-python==4.5.3.56
numpy==1.21.2

Installation and Setup

1. Hardware Connections

IR Sensor Connection:

• Connect IR sensor to GPIO pin 23
• Connect VCC to 5V
• Connect GND to ground

4x4 Keypad Connection:

• Row pins: GPIO 5, 6, 13, 19 (L1, L2, L3, L4)
• Column pins: GPIO 12, 16, 20, 21 (C1, C2, C3, C4)

Servo Motor Connection:

• Connect servo signal wire to GPIO pin 2
• Connect VCC to 5V
• Connect GND to ground

2. Software Installation

1. Install Python dependencies:

   pip install Flask RPi.GPIO opencv-python numpy

2. Clone or download the project files to your Raspberry Pi

3. Configure IP addresses:

   • Edit app.py and update the whitelisted_ips list with your device IPs
   • Edit cameraphone.py and update the url variable with your smartphone's IP and port

4. Configure CCTV recording directory:

   • Edit cameraphone.py and update the output_dir path

Usage Instructions

Running the Complete System

1. Start the IR sensor monitoring:

   python ir.py

   This script runs continuously and monitors for motion detection.

2. Start the keypad authentication system:

   python type1.py

   This script waits for OTP input via the keypad.

3. Start the CCTV recording (optional):

   python cameraphone.py

   This script records video from your smartphone camera.

System Workflow

1. Motion Detection: When the IR sensor detects motion, it automatically starts the Flask server (app.py)

2. OTP Generation: The server generates a new 7-character OTP every 30 seconds and saves it to otp.txt

3. Web Access: Access the OTP by visiting http://[RASPBERRY_PI_IP]:5000 from a whitelisted device

4. Keypad Input: Enter the 7-character OTP using the 4x4 keypad:

   • Row 1: 1, 2, 3, A
   • Row 2: 4, 5, 6, B
   • Row 3: 7, 8, 9, C
   • Row 4: *, 0, #, D

5. Access Control: If the OTP is correct, the servo motor rotates to open the gate for 30 seconds

6. Automatic Shutdown: The Flask server automatically stops after 30 seconds to save power

CCTV Functionality

The CCTV system (cameraphone.py) provides continuous video recording:

• Connects to a smartphone camera stream
• Records video in 20-second segments
• Saves recordings with timestamps
• Stores files in the specified directory

Security Features

• IP Whitelisting: Only authorized IP addresses can access the OTP
• Dynamic OTPs: OTPs change every 30 seconds
• Power Efficiency: Server only runs when motion is detected
• Automatic Timeout: Gate automatically closes after 30 seconds

Troubleshooting

1. GPIO Permission Issues: Run with sudo or add user to gpio group
2. Network Connectivity: Ensure all devices are on the same network
3. IP Address Changes: Update whitelisted IPs if devices change
4. Servo Motor Issues: Check wiring and power supply
5. CCTV Connection: Verify smartphone IP and port settings

Notes

• All devices must be on the same network
• The system is designed for power efficiency with automatic shutdown
• CCTV recordings are stored locally on the Raspberry Pi
• The servo motor provides physical access control
• The system can be extended with additional sensors and features