IoT Project
Air Quality Monitoring System
A sensor network that tracks PM2.5, CO2, temperature, and humidity in real time, flagging unsafe air quality before it becomes a health risk.
Overview
Poor indoor air quality is invisible until someone starts feeling its effects — this system puts real numbers behind it. Sensors placed around a building continuously measure particulate matter, CO2, temperature, and humidity, and stream readings back to a live dashboard.
When any reading crosses a configurable threshold, the system automatically alerts the people responsible, so ventilation or filtration can be adjusted before air quality becomes a comfort or health problem.
How It Works
Each sensor node samples the air every few seconds, publishes readings over MQTT, and the backend stores a rolling history for trend charts and alerting.
Gallery
Tech Stack
Hardware
ESP32 microcontroller with a PMS5003 particulate sensor and a BME280 for temperature, humidity, and pressure
Connectivity
Wi-Fi, publishing readings over MQTT
Backend
PHP + MySQL ingest API, with threshold-based email alerts
Dashboard
Live readings dashboard with historical charts and an air quality index score
Want air quality monitoring for your building or facility?
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