Sensirion SFM3x00 series flow meter. Supported devices include SFM3200, SFM3300 and SFM3400. Wraps a modified version of https://github.com/PubInv/SFM3X00. Volume calculations based on https://github.com/MyElectrons/sfm3300-arduino. This software library has not been submitted for medical device approval; it is provided for research, educational and development purposes only.