Stemoto LogoStemoto
Back to Directory

Air Around Us (Smart Air Quality Index AQI & Atmospheric Pressure Station)

Source:

Inspect the invisible air! Build an Air Quality Monitor using a GP2Y1010 dust sensor and BMP280 barometer. Measure PM2.5 particulate dust, oxygen levels, and atmospheric air pressure, displaying real-time AQI scores.

Categorisation

Props & Materials Required

  • •GP2Y1010AU0F optical dust / PM2.5 particulate sensor
  • •BMP280 barometric pressure & altitude sensor
  • •5V DC mini air sampling fan
  • •ESP32 controller board
  • •16x2 LCD display screen
  • •DFPlayer Mini MP3 module + 3W speaker

Step-by-Step Instructions

1

Turn ON Air Sampling Fan

Air fan draws ambient room air past the optical dust sensor.

2

Optical Sensor Counts Dust Particles

IR LED inside dust sensor detects light scattered by dust particles.

3

Read Air Pressure & AQI Score

BMP280 reads 'Air Pressure: 1013 hPa'. Dust sensor reads 'PM2.5: 28 µg/m³ (AQI: GOOD)'.

4

Simulate Smoke Pollution Test

Blow incense smoke near sensor. PM2.5 spikes to 320 µg/m³! Red LED flashes + Speaker warns: 'POOR AIR QUALITY! High particulate smoke detected! Wear N95 mask!'

Why It Works & Notes

Air is a mixture of gases (Nitrogen, Oxygen) plus floating dust/smoke particles that cause pollution. Using optical dust sensors to count PM2.5 particles and barometers to measure air pressure turns air science into environmental monitoring.