Slightly off-topic

Home Assistant has been running here for several years, and there are quite a few mammals in a relatively small space (humans and dogs). Air quality plays a significant role in well-being. I spent some time tinkering around to find good sensor solutions (I still use esp32 with bme280/dallas and mhz19 for other rooms), and after some back and forth, I purchased an Awair Element. At first glance, it seems quite expensive, but the sensors alone would cost me 1/3 of the price.

We love it. The little LED that indicates air quality, which I didn't even notice at first, is extremely helpful. The sensors are so accurate that I can see when someone has cooked something, when cleaning products have been used, or when we have a dog visiting. A simple API+web server (which I never needed), as the Home Assistant integration works great.

Great device.