Measuring Air Quality with ESP32 & Arduino

Sep 23, 2022  Sensors - Sensing the outside world

Use an ESP32 or Arduino to measure the quality of the air you breathe!  Today, we'll work with several air quality sensors.

Article with code:  https://dronebotworkshop.com/air-quality

More articles and tutorials: https://dronebotworkshop.com

Join the conversation on the forum: https://forum.dronebotworkshop.com

Subscribe to the newsletter and stay in touch: https://dronebotworkshop.com/subscribe/

Pollution is a problem that affects everyone, no matter where they live. Even if you reside in a rural area, you are still subject to many types of pollution, both outdoors and inside your home.
Today we will look at several air quality sensors that you can use with a microcontroller. We’ll test them out using both an ESP323 and an Arduino, and we’ll also compare the readings to a commercial air quality meter to see if there is any correlation between readings.

We’ll be taking a look at the following sensors:

- MQ Gas Sensors (various models).

- PMS5003 PM2.5 Particulate Matter Sensor.

- BME280 Temperature, Humidity & Air Pressure Sensor.

- BME680 Temperature, Humidity & Gas Sensor.

- AHT20 Precision Temperature & Humidity Sensor.

- CCS811 Air Quality Sensor.

- SGP30 Air Quality Sensor.

- SGP40 Air Quality Sensor.

We’ll see how they work and what parameters they can measure, and we’ll hook them up and run a demo.

Then we’ll put a bunch of sensors together on an ESP32 to make an environmental monitoring platform.

Here is the Table of Contents for today's video:

00:00 - Introduction

01:38 - Air Quality

03:36 - Look at sensors

05:12 - Sensor Calibration Issues

06:46 - MQ Sensors Intro

12:25 - MQ Sensors Library & Code

16:42 - MQ Sensors ESP32 Considerations

21:00 - PM2.5 Sensors

27:55 - Temperature & Humidity Sensors Intro

31:25 - BME280 Demo

33:28 - BME680 Demo

35:49 - AHT20 Demo

37:33 - Air Quality Sensors Intro

39:40 - CCS811 Demo

43:09 - SGP30 Demo

45:38 - SGP40 Demo

47:36 - ESP32 Multi-Sensor

58:45 - Conclusion

On a personal note, this project actually alerted me to several areas in my home that I need to improve the air circulation in. Hopefully, you will find it equally useful!

Bill