Gas_Leak_Detection

A smart gas detection system using Raspberry Pi, MQ2 & MQ7 sensors, and real-time alerts. This project is designed to detect hazardous gas leaks and provide instant alerts

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🚨 Gas Leakage Detection & Alert System using Raspberry Pi

📌 Overview

This project is a Gas Leakage Detection and Alert System using Raspberry Pi, MQ2 & MQ7 sensors, 16x2 I2C LCD, and a buzzer. It detects dangerous gas leaks and provides real-time alerts via:

  • LCD Display showing safety status and sensor values
  • Buzzer Alarm when gas concentration exceeds safe levels
  • Telegram Alerts when gas leakage is detected
  • Web Dashboard to monitor real-time sensor readings

🎯 Features

✅ Real-time gas leakage detection (2x MQ2 & MQ7 sensors for redundancy)
✅ LCD Display (16x2 I2C) for live status updates
✅ Buzzer alerts when gas concentration is unsafe
✅ Telegram notifications for remote alerts
✅ Web Dashboard to monitor sensor values & update thresholds

🛠️ Hardware Components

Component Quantity Description
Raspberry Pi 1 Main controller (tested on Raspberry Pi 3/4)
MQ2 Gas Sensor 2 Detects LPG, CO, smoke, etc. (redundancy)
MQ7 Gas Sensor 1 Detects Carbon Monoxide (CO)
16x2 I2C LCD 1 Displays gas status & readings
Buzzer 1 Sounds alarm for gas leaks
Jumper Wires -- For connections
Breadboard 1 For easy wiring (optional)
Power Supply 1 5V adapter for Raspberry Pi

🖥️ Software Requirements

  • Raspberry Pi OS (32-bit) / Raspbian
  • Python 3
  • Flask (for web dashboard)
  • RPLCD (for I2C LCD)
  • RPi.GPIO (for GPIO handling)
  • Requests (for Telegram API)

To install dependencies, run:

sudo apt update && sudo apt upgrade -y
pip3 install flask RPi.GPIO RPLCD requests

🚀 Setup & Installation

1️⃣ Hardware Setup

  • Connect MQ2 & MQ7 sensors to GPIO pins
  • Connect 16x2 I2C LCD to Raspberry Pi (SDA, SCL)
  • Connect Buzzer to GPIO pin

2️⃣ Enable I2C on Raspberry Pi

sudo raspi-config

Navigate to Interfacing Options → I2C → Enable.

3️⃣ Find I2C Address of LCD

Run:

i2cdetect -y 1

The LCD’s address should appear (e.g., 0x27). Update the code if needed.

4️⃣ Setup Telegram Bot

  1. Open Telegram and search for "BotFather".
  2. Create a bot using /newbot and get your BOT_TOKEN.
  3. Get your CHAT_ID from @userinfobot.
  4. Update BOT_TOKEN and CHAT_ID in app.py.

5️⃣ Run the Application

Clone this repository:

git clone https://github.com/BENi-Aditya/Gas_Leak_Detection.git
cd Gas_Leak_Detection

Run the script:

python3 app.py

Access the Web Dashboard at:
👉 http://<RaspberryPi-IP>:5000

📊 Web Dashboard

The web dashboard provides:

  • Live sensor readings
  • Gas safety status
  • Threshold calibration (adjust MQ2 & MQ7 sensitivity)

🛠️ Troubleshooting

1. LCD Display Shows Gibberish

  • Ensure correct I2C address (0x27 or 0x3F)
  • Run i2cdetect -y 1 to confirm the address
  • Use lcd.ljust(16) to pad text properly

2. No Telegram Alerts?

  • Double-check BOT_TOKEN and CHAT_ID
  • Run: bash curl -s https://api.telegram.org/bot<BOT_TOKEN>/getUpdates Ensure your bot is active in the chat

3. Buzzer Doesn’t Work?

  • Check if the GPIO pin is correctly assigned (BUZZER_PIN in app.py)
  • Ensure the sensor values are updating properly

🤝 Contributing

Got ideas to improve this project? Feel free to fork, modify, and create pull requests!

🌟 Acknowledgments

Special thanks to Open Source Contributors and the Raspberry Pi Community for continuous support!

📞 Contact

📧 Email: aditya.tripathi.beni@gmail.com
🐦 GitHub: BENi-Aditya
📷 Instagram: @aditya.beni_

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