So these are fake/inaccurate? That's a shame because I wanted to build one someday - but also they sell them to schools for CO2 monitoring? https://www.airgrad

So these are fake/inaccurate? That's a shame because I wanted to build one someday - but also they sell them to schools for CO2 monitoring? https://www.airgradient.com/open-airgradient/shop/ https://www.airgradient.com/open-airgradient/shop/ also previously on HN: https://news.ycombinator.com/item?id=28457135 https://news.ycombinator.com/item?id=28457135 > Monitoring my home's air quality (CO2, PM2.5, Temp/Humidity) with AirGradient's DIY sensor September 8, 2021 > A few months ago, I found this Hacker News post about the AirGradient DIY Air Quality Monitor. I had already been considering buying an AirThings Wave Plus sensor to monitor my home's CO2 levels, but the high price and limited 'ownership' of the data coming from it turned me off. also > AirGradient: DIY Air Quality Monitoring with Open-Source Hardware & Firmware https://news.ycombinator.com/item?id=27124671 https://news.ycombinator.com/item?id=27124671 https://www.airgradient.com/open-airgradient/instructions/diy/ https://www.airgradient.com/open-airgradient/instructions/di...