[kotaKat]

It's going to be similar bullshit to what Halo uses in the highschool vape sensors. A bunch of particulate sensors for like PM1, PM2.5, PM10, sniffing out VOCs, and then they consider any tripping of any of that to be a "smoke" sesh.

Edit: Oh. Rest is just NoiseAware. They're just reselling NoiseAware sensors which are just - yes - a bunch of particulate sensors hooked up to an ESP32 hooked to a web dashboard.

[fnordpiglet]

Yeah the anecdotal evidence leads you to this as well - the hair drier usage leading to triggering the sensor. My PM/VoC sensors in my bedroom spike when my wife dries her hair while my CO/CO2 sensors do not.