If you're talking about the author of OP, I'm guessing he uses the AirGradient sensors, since he made them :) I like them enough I'm now up to four in my home.

If you're talking about the author of OP, I'm guessing he uses the AirGradient sensors, since he made them :) I like them enough I'm now up to four in my home. They did send two for evaluation initially (I did a video on them last year) but I liked them and bought more. I reflash them to ESPHome so I can easily pop them into Home Assistant.