Gas Leakage Detection Bot

🚀 What is our project about?

The Gas Leak Detection Bot is an intelligent, low-cost autonomous rover designed to detect hazardous gas leaks (LPG and CO) in real time while keeping humans out of danger. It integrates sensing, navigation, live video streaming, and a web-based control system into a compact and scalable safety solution.

❓ Why did w decide to make it?

Gas leaks in industries, pipelines, and confined environments can be life-threatening. Manual inspection exposes workers to serious risks. During the NavaNieti 24-hour hackathon, we aimed to build a system that eliminates direct human involvement while still enabling fast and reliable detection.

Our focus was to create a solution that is:

• Safe (no human exposure)
• Affordable (using common components)
• Smart (real-time alerts + monitoring)
• Practical (remote operation + live feedback)

🔌 Complete Hardware Connections

⚙️ Motor Driver (L298N)

• IN1 → GPIO 14
• IN2 → GPIO 27
• IN3 → GPIO 26
• IN4 → GPIO 25
• ENA → GPIO 12 (PWM)
• ENB → GPIO 33 (PWM)
• 12V → Battery Supply
• GND → Common Ground with ESP32

📏 Ultrasonic Sensors (HC-SR04)

Front Sensor

• TRIG → GPIO 5
• ECHO → GPIO 18

Back Sensor

• TRIG → GPIO
• ECHO → GPIO 21

⚠️ Use voltage divider for ECHO (5V → 3.3V)

🧠 IR Sensors

• Left IR → GPIO 34
• Right IR → GPIO 35

🌫️ MQ-9 Gas Sensors

• LPG Sensor → GPIO 32 (Analog)
• CO Sensor → GPIO 36 (Analog)

🧭 MPU6050 (Gyroscope)

• SDA → GPIO 23
• SCL → GPIO 22
• VCC → 3.3V
• GND → GND

🔊 Buzzer

• Signal → GPIO 4
• GND → GND

🔋 Power Syste

• ESP32 → 5V/3.3V regulated supply
• Motors → Separate battery supply
• All modules share common ground

⚙️ How does it work?

🧠 System Architecture

The system is divided into two parts:

1. ESP32 (Main Controller)

• Hosts WiFi network (ESP32_BOT)
• Runs web server dashboard
• Processes all sensor data
• Controls robot movement

2. ESP32-CAM

• Connects to ESP32 WiFi
• Streams live video feed

🔄 Working Flow

• ESP32 initializes all sensors and starts WiFi hotspot
• User connects to 192.168.4.1 via browser

Dashboard loads with:

• Movement controls
• Live gas readings
• Video stream
• Dashboard loads with:1. Movement controls2. Live gas readings3. Video stream
• Robot operates in two modes:

Manual Mode

• User controls movement using on-screen buttons

Autonomous Mode

• Ultrasonic + IR sensors detect obstacles
• Robot navigates automatically

🌫️ Gas Detection & Safety

• MQ-9 sensors continuously monitor gas levels
• Values converted to PPM
• Compared with safety threshold

If gas exceeds limit:

• Motors stop immediately
• Buzzer activates
• Dashboard shows critical alert
• Location marked on map

🧭 Mapping (Dead-Reckoning)

• MPU6050 tracks rotation and direction
• Movement path estimated
• Dangerous zones plotted on dashboard

📡 Live Video Streaming

• ESP32-CAM streams MJPEG feed
• Embedded in dashboard
• Provides real-time visual monitoring

🎥 Project Demo Video

💡 Conclusion

The Gas Leak Detection Bot demonstrates how embedded systems and IoT can be combined to improve safety in hazardous environments. It provides real-time monitoring, reduces human risk, and offers a scalable foundation for future industrial automation systems.