“In this project I show how to build a particles detector with data display, data backup on SD card and IoT with Android application.
In this project I show how to build a particle detector with data display, data backup on SD card and IoT. Visually a NeoPixel ring display indicates the air quality.
Air quality is an increasingly important concern today. there are systems to measure the dust rate but they are very expensive.
There are low-cost, high-quality particle detectors on the market, as shown by some studies.
https://www.atmos-meas-tech.net/11/4823/2018/amt-11-4823-2018.pdf
I therefore decided to build a device capable of measuring the number of particles by size classes (0.5µm to 10 µm), visually with a simple display of the result (NeoPixel ring), a more detailed display on a TFT screen, and a time-stamped backup on an SD card..
In addition I have added a bluetooth communication module to be able to communicate with an android application and thus publish the results on an IoT server.
The overall cost of the whole does not exceed 60€.”