Are there any individuals or services that will build a custom air quality sensor from individual components for a fee? I am mainly interested parties in a couple humidity+temp+co2 boxes (wifi,zigbee,zwave or cable)
(Airgradient is prob ideal but too expensive)
You can find something on
TinderTindie, for example: https://www.tindie.com/products/bytesontherocks/air-quality-platform-co2/https://www.tindie.com/products/nicody/air-quality-pm25-pm1-over-wifi-mqtt/
https://www.tindie.com/products/metriful/sensor-board-for-air-quality-sound-light/
Finally, a use of Tinder that I can wholeheartedly support.