[ajolly]

It's cute but unless you really need the size+ onboard screen, I don't see the big win of this over an Apollo air-1. (Esphome based, easy HA integration.

Or an inkbird - I paid $99 for one with co2, HCHO, AQI, PM2.5 PM10, TVOC, Temperature, Humidity. It has a display and integrates with home assistant. Built in battery if you want to move it around.

I own both of those. A DIY it but I haven't seen a good reason to.

The big advantage of the ESP home devices out there is they are extremely easy to tinker with if you want to change anything