A hackable air quality sensor sensor from IKEA
VINDRIKTNING Air quality sensor Do you want to know more about the air you breath in your home? Check the air quality based on particles (PM2.5) with this stylish and easy-to-use sensor – perfect to combine with FÖRNUFTIG air purifier.
Supports ESP32 and Home-assistant
https://style.oversubstance.net/2021/08/diy-use-an-ikea-vindriktning-air-quality-sensor-in-home-assistant-with-esphome/
you can even buy drop in boards that supports more sensors https://github.com/LaskaKit/ESP-Vindriktning