Plug for open-source air quality monitoring: https://sensor.community/en/ https://sensor.community/en/ Build your own sensor for about 50-60 dollars. The commu

Plug for open-source air quality monitoring: https://sensor.community/en/ https://sensor.community/en/ Build your own sensor for about 50-60 dollars. The community has a DIY guide. There used to be a guide that didn't require soldering, but the current guide still isn't very complex.