While on the search for an alternative to directly buying the fairly expensive MH-Z19 CO2 sensor, [spezifisch] came across a ‘BreeRainz’ branded gadget (also found under other brands ...

With a sprinkling of hardware and software, he was able to get these cheap laser particle sensors working on his Raspberry Pi, and his work was ultimately incorporated upstream into Mycodo.

“In front of you is the world’s, like the newest, world's most powerful gas sensor ever built ... out whether this is a molecule like carbon dioxide or like some other exotic molecule ...