<p>The OK Lab Stuttgart has a project to build fine particulate matter sensors by yourself. The data can then be sent to the database of https://luftdaten.info. This app shows you data from this network. It is not necessary to operate an own sensor to use this app.</p> <p>Currently supported sensor types are: SDS011, SDS021, HPM, DHT11, DHT22, HTU21D, BME280 (temperature & humidity only)</p> <p>Besides the main application, this app also provides three widgets:</p> <ul> <li>A small widget that takes minimum space and displays the most current data as text.</li> <li>A large widget that displays the most current data and draws charts for fine particulate matter, temperature and humidity.</li> <li>A large widget that displays the particulate matter concentrations from the sensors around you.</li> </ul> <p>This app requires Android 4.4 to run.</p> <p>You can find a short manual and the privacy policy here: https://codeberg.org/Starfish/Feinstaubwidget/wiki</p>