[Cyrill] has a good home automation scheme going: there are a number of physical switches set around the place that control the essential functions. The only problem is that in the winter time, this results in a great deal of phone checking as [Cyrill] tries to monitor the CO2 level. Tired of all this screen time, [Cyrill] set about to create an incredibly cute (and useful) Co2 monitor that plainly shows the current level and how bad it is, relatively speaking.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/03/19/cute-co2-gauge-tells-you-when-to-crack-a-window/