Published October 23, 2022 © MIT

Offline Air Quality Monitor

A simple air quality sensor made of "spare parts" I had in my drawers: an Arduino Nano, a Nano base, a SeeedStudio Multichannel gas sensor.

BeginnerFull instructions provided1 hour161

Things used in this project

Hardware components

Ikea VINDRIKTNING PM2.5 air quality sensor

Arduino Nano

Deek Robot Nano SHield

Seeed Studio Grove - Multichannel Gas Sensor v2

Adafruit DHT22 temperature-humidity sensor

Seeed Studio Grove button

Software apps and online services

Arduino IDE

Nano_Multichannel_OLED Code

Story

A friend had a rant about air quality, so I rooted around my spare parts drawers and built this custom air pollution gizmo for him. Offline device, so that it works anywhere my friend takes it, displaying gas data: Carbon monoxide (CO), Nitrogen dioxide (NO2), Ethyl alcohol (C2H5CH) and Volatile Organic Compounds (VOC). I added an AM2302 (DHT22) sensor, because it was right here, unused :-)