Nox,
Thank for letting me know.
regards rob
For VOC did you look at the MQ135? https://www.olimex.com/Products/Components/Sensors/SNS-MQ135/resources/SNS-MQ135.pdf
I looked at Github, but I could only find the MicroGeiger source code. You have for Uradmonitor-D also a Github Repo online?
Very nice development. I was wondering if the hard/software is Opensource. For the PM2.5 sensor a PPD42 with fan seems to result in much more accurate reading. http://indiaairquality.com/
Regard Rob Oudendijk