Smart Home & Security System

This project demonstrates the design and implementation of a smart home automation and security system using ESP32 microcontrollers.
It combines environmental monitoring, video surveillance, and access authentication into one integrated solution with a local Flask-based web dashboard.

The goal is to create a cost-effective, modular, and scalable IoT system that improves comfort, safety, and security at home.

Modern smart homes aim to make daily life more convenient, safe, and energy-efficient.
This project focuses on:

• Real-time monitoring of environmental conditions (temperature, humidity, gas, light).
• A secure keypad + servo motor lock for access control.
• A live ESP32-CAM stream for indoor/outdoor surveillance.
• A Python Flask dashboard that collects, visualizes, and serves all system data locally.

The system consists of three major subsystems, all interconnected:

• Hardware: ESP32 + DHT11 (temperature & humidity), MQ-2 (butane gas), LDR (light sensor).
• Function: Collects sensor readings every few seconds.
• Communication: Sends data to the Flask server over Bluetooth (Serial via PySerial).

• Hardware: ESP32 + 4x4 Keypad + Servo Motor.
• Function:
  • Users enter a username-password combination.
  • On success, servo unlocks the system.
  • On failure, access is denied and can be logged for security analysis.
• Predefined Users:
  • User A → a / 123
  • User B → b / 456
  • User C → c / 789

• Hardware: ESP32-CAM with OV2640 module.
• Function: Provides live video stream accessible via a fixed IP address.
• Integration: Video feed embedded directly into the Flask dashboard.

• Software: Python Flask + HTML/CSS/JS
• Functions:
  • Receive and log sensor data (data.csv).
  • Serve dashboard with real-time sensor values and historical graphs.
  • Embed ESP32-CAM stream.
  • Provide an information page about the system.

• ESP32 Code: Written in Arduino IDE (C++). Each ESP32 node has its own program.
• Python Flask Server:
  • Uses PySerial for Bluetooth communication.
  • Stores incoming data into a CSV file.
  • Updates the web interface every ~30s with latest sensor values.
• Web Dashboard:
  • Built with Flask templates (templates/ folder).
  • Includes graphs, live values, and video stream integration.
  • Optimized with Bootstrap for responsive display.

• Sensor Readings Example (during testing):

  • Temperature: 29.7 °C
  • Humidity: 52.5 %
  • Gas (butane): 18 %
  • Light intensity: 73 units

• Authentication:

  • Correct username-password successfully triggered the servo lock.
  • Incorrect attempts were ignored, ensuring basic security.

• Video Stream:

  • Accessible on local IP.
  • Clear visuals with minimal latency.

• Hardware:
  • 2 × ESP32 Dev Boards
  • 1 × ESP32-CAM Module (OV2640)
  • DHT11 Sensor
  • MQ-2 Gas Sensor
  • LDR Sensor
  • 4x4 Keypad
  • Servo Motor
• Software:
  • Arduino IDE with ESP32 boards installed
  • Python 3.x with:

    pip install flask pyserial

The models and code for the Security and Smart Home system can be accessed via the following link:
https://drive.google.com/drive/folders/1iLy0hhGCsV5aN7Efjmyp3YFj8fuVtCs?usp=sharing