🌍 IoT-Based Air Quality, Weather & Gas Leakage Monitoring System

📌 Project Overview

This project implements a real-time Air Quality Index (AQI) Monitoring, Weather Monitoring, and Gas Leakage Detection System using IoT architecture and the MQTT protocol.

The system collects environmental data from multiple sensors connected to a BeagleBone Black, processes the data using Python, stores it in MySQL, and enables intelligent decision-making through threshold-based alerts.

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🧠 System Architecture

Sensors → BeagleBone Black → MQTT Publisher → MQTT Broker → MQTT Subscriber → Data Processing → MySQL Database → Alerts / Dashboard

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🛠 Hardware Components

• BeagleBone Black
• BMP280 (Temperature & Pressure Sensor)
• DHT11 (Temperature & Humidity Sensor)
• MQ4 (Methane Gas Sensor)
• Power Supply
• Internet Connectivity

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💻 Software Stack

Layer	Technology Used
Programming	Python 3
Communication	MQTT Protocol
Database	MySQL
OS (Edge Device)	Debian (BBB)

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📡 Features

1️⃣ Air Quality Monitoring

• Calculates AQI based on collected environmental parameters
• Stores processed data in MySQL
• Supports threshold-based alerting

2️⃣ Weather Monitoring

• Monitors temperature, humidity, and atmospheric pressure
• Enables environmental trend analysis

3️⃣ Gas Leakage Detection

• Detects methane gas using MQ135 sensor
• Generates alerts when gas levels exceed safety thresholds

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