FeinstaubWidget

This app displays fine particulate matter data from the luftdaten.info network. No need to own a sensor! Supports SDS011, SDS021, HPM, DHT11, DHT22, HTU21D, and BME280 sensors. Includes three widgets: a compact text display, a detailed chart widget, and a local sensor map. Requires Android 4.4+. Learn more: https://codeberg.org/Starfish/Feinstaubwidget/wiki