I’m really happy to see this here. I fully endorse this project. I came across it a couple years ago as a workshop at 3c. The goal is better transparency on pollution data . My city does collect some data but it’s not very detailed or localized. These devices can measure pollution/temp/humidity and even noise. Pollution is measured in ppm per minute (default) resolution. These devices are also very easy to set up. No soldering necessary. Only requires a nearby 2.4ghz wifi network.