Very interesting read. Based on our experience developing and manufactoring air quality monitors, making a customized PCB should be done as early as possible in the developing process. With easy to use editors (e.g. easyEDA) and cheap and fast PCB production/assembly (even for small quantities), there is no reason to use overized MCUs/mini computers like the Pi and expensive modules e.g. from Adafruit. Also, BOM comp…
Genuinely curious, as I've typically used things like the Pi for projects like this but have been genuinely curious what it would take to strip it down to something less powerful and achieve the same result.