I want to present to you my new open source project – Smoggler! It’s a cheap tool (about 200-250 PLN) based on Raspberry PI 3 and a dust sensor SDS011 to measure the quality of air – it’s real problem currently in Poland. All with a quite nice web interface. If any online sensor is not available yet in your area you can create your own!
Smoggler!
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Jakub Bujny - personal blog 