Air Quality Monitoring System using ESP32

Air pollution is a critical concern in Indian cities. An Air Quality Monitoring System measures pollutants like PM2.5, PM10, CO2, and VOCs, displaying real-time data and historical trends. This project contributes to environmental awareness and public health.

Why This Project Is Popular

Air quality monitoring has gained immense importance post-COVID. Governments, schools, and residential societies are installing monitoring stations. This project teaches you to interface multiple gas sensors, work with ADC (Analog-to-Digital Conversion), create IoT dashboards, and understand environmental data. It's impactful, relevant, and has real-world applications.

Project Ideas or Guide

Build a comprehensive monitoring system with these features:

• Particulate Matter: Use PMS5003 sensor to measure PM1.0, PM2.5, and PM10 particles.
• Gas Sensors: Add MQ-135 for CO2, MQ-7 for CO, MQ-131 for Ozone.
• Environment Sensors: Include BME280 for temperature, humidity, and pressure.
• Data Logging: Send all data to ThingSpeak or InfluxDB for historical analysis.
• Alert System: Trigger buzzer/LED when AQI crosses safe thresholds.
• Display: Show real-time AQI on OLED display at the location.

Components Used

• ESP32 Dev Board
• PMS5003 Particulate Sensor
• MQ-135 Gas Sensor
• BME280 Sensor
• 0.96" OLED Display
• Buzzer

FAQ

Q: What is PM2.5 and why is it important?

A: PM2.5 refers to particles smaller than 2.5 micrometers - they can penetrate lungs and cause health issues.

Q: How accurate are these sensors?

A: Consumer-grade sensors provide good relative measurements. For official AQI, calibration against reference instruments is needed.