Air Quality station

A simple yet powerful system for Air Quality monitoring.

By: JP Gleyzes

Overview

This DIY air quality monitoring system integrates precision sensors with a connected processing platform and a low-power e-paper display.

It monitors:

• Temperature

• Pressure

• Humidity

• CO2 level

• Air quality (particulates/dust)

System Architecture

Processing Unit (Core): TheESP32 S2 Lolin mini manages the sensors. It offers native Wi-Fi connectivity, ideal for sending data to dashboards (Home Assistant, InfluxDB, or MQTT).However, for this project, I preferred a simple e-paper display without any Wi-Fi connection! ***Display:**

3.7-inch E-Paper (240x416): Electronic ink technology allowing for static data display with zero power consumption between refreshes, ensuring a clear and readable interface. ***Air Quality Sensors:**

SCD40: Photoacoustic sensor for CO2 concentration, temperature, and relative humidity. +Plantower PMS5003: Laser scattering sensor for measuring fine particulate matter (PM1.0, PM2.5, PM10).

Complementary Environmental Sensors:

BME280: Precision measurement of barometric pressure, humidity, and temperature.

DS18B20: Digital temperature sensor using a 1-Wire interface, ideal for remote measurement or isolated thermal reference.

The full project is described on my hackaday pages : https://hackaday.io/project/205888-air-quality-station

Category: Other