There is another Open Source alternative by FabLab Barcelona. The SmartCitizen Kit: https://smartcitizen.me/ https://smartcitizen.me/ https://www.seeedstudio.

There is another Open Source alternative by FabLab Barcelona. The SmartCitizen Kit: https://smartcitizen.me/ https://smartcitizen.me/ https://www.seeedstudio.com/Smart-Citizen-Starter-Kit-p-2865.html https://www.seeedstudio.com/Smart-Citizen-Starter-Kit-p-2865... It is mainly for outdoor pollution (including light & noise), but it also include indoor gaz sensors for Co2 and VOC.