Aranet is a home air quality sensor. This python script allows people to get data from it.
I once set one up using periodically running the mqtt example script in the GitHub repo you linked. That works, but now that HA has actual bluetooth support, it would be a lot more user-friendly to make it an actual integration
Since Home Assistant has Bluetooth support through ESPHome, you can retrieve the Aranet4 data through an ESPHome device. I created a ESPHome package for that: GitHub - stefanthoss/esphome-aranet4: Read data from an Aranet4 CO2 sensor and expose it in Home Assistant If you already have an ESP32, it’s a bit easier to set up than running a separate MQTT script or building a full HA integration.
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