What is this?
Arduino library for HM3301/HM3302 dust sensor. https://www.seeedstudio.com/Grove-Laser-PM2-5-Sensor-HM3301.html
This is intended to provide a much simpelr-to-use version of the library originally published by Seeed.
How to use this?
examples/BasicHM330XDemo, which explains pretty much everything.
If you have M5StickC or M5Atom Matrix, please try
examples/M5Stack/AirQualityMeter. Click the image below to watch the demo video.