• Sep 1, 2025 Atmospheric Monitoring With Arduino Building Simple Devices To Collect Data About The Environment Emily Gertz d String fileName airdata Stringmillis txt File dataFile SDopenfileName FILEWRITE Write data to file dataFileprintlnPM25 StringPM25 dataFileprintlnPM10 StringPM10 dataFileclose Print data to serial monitor SerialprintPM25 SerialprintlnPM25 SerialprintPM10 Serialprintln By Frida Blick