With how bad air quality has been this year, I grabbed myself a DIY AirGradient kit so I can monitor air quality in my living space. It was easy to assemble and only required a little bit of soldering knowledge. I'm definitely not proficient enough at soldering as many components ended up crooked on the board. Still works though lol.
In the picture it's running ESPHome with the configuration from ajfriesen on GitHub.
How does it calibrate?
Not op, I'm not seeing anything about calibration for PM or VOC just stuff for open air bump tests. Interesting alternatives to filter load and PIDs I wonder if they're robust enough to find their way into EPA or OSHA level investigations, I haven't run across them yet