https://github.com/hackerspace-silesia/Smogomierz
GitHub - hackerspace-silesia/Smogomierz: Smogly(formerly: Smogomierz) - simple and cheap PM 2.5 and...
Smogly(formerly: Smogomierz) - simple and cheap PM 2.5 and PM10 sensor based on NodeMCU (ESP8266) or ESP32 - hackerspace-silesia/Smogomierz