Sorry for OT, but there are no PMs on hacker news. I found your comment about CO2 sensors for Raspberry PI from last year [0]. Have you finished this project? If yes, could you share a few details?

For my first Rasberry PI project, I am considering buying Enviro for Raspberry Pi + Air Quality. I would like to add an affordable CO2 sensor that would require minimal config and no soldering. Pimoroni folks told me MH-Z19 would not work because of the number of pins. Would you have any suggestions on what sensor to choose and how to make it work with Enviro / Raspberry PI?

0. https://news.ycombinator.com/item?id=20185649