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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@AkosLukacs
I'm working on something similar. OLED displays with Espruino are pretty easy, if you wire up it properly :)
https://luftdaten.info/ has a service & map where you can post dust-data (works outside of Germany too). They have a complete guide about how to make a stationary sensor with ESP8266, if you are interested.