Airgradient's popular indoor air quality sensors are the first devices of their kind to be officially certified as "Works with Home Assistant". These open-source devices do not require an internet connection and enable local automation with air purifiers, air conditioners, or humidifiers and dehumidifiers.
I’ve been using airthings wave plus and didn’t have any issues so far with HA. They also detect radon, I’m not sure about nox.