Hey,
I would like to help you with this project. I have experience working with very sensitive sensors and Arduino. Looking at your requirements, this projects looks really fun to me. And if need arises, I would be happy to help with further stages of the project. I am a Computer Science Grad student in CU boulder, and hence also have experience with machine learning, 3D printing and Printed Circuit board design.
Current bid includes :
1. Hardware List and Circuit diagram ( co2 ppm sensor and valve depending on requirements)
2. Arduino sketch( program) : pid/pd controller for co2 levels.
3. Data stream from Arduino to web/local server ( if required).
4. Hardware cost NOT INCLUDED
I would be happy to meet and discuss specifics of the project in more detail.
Let me know if you have any questions.
Thanks
—
Vish