I overengineered an air quality sensor because the commercial options didn't cut it for me. Custom PCB, open source hardware ;)
I built a custom 4-layer PCB with SCD41, SGP41, SHT40 and BMP280, running ESPHome. Sensor fusion, air quality score, configurable thresholds, three isolated power rails. Making it public in case anyone wants to build one.
https://github.com/roepkefeller/air-quality-sensor
Usually I don't show my projects online (IP/industry stuff, the kind of hardware I am developing is pretty closed source..), so I'm very interested in some thoughts! If anyone builds this board please let me know haha. I'm also happy to answer some questions!
u/carloroepke — 1 day ago