People measure and monitor altitude in various activities (sports, recreation, flying, etc.). We do this because of technical needs or merely a desire for information. There are several ways of measuring altitude, of which in this section we focus on indirect measurement via air pressure. Our device is based on a Bosch BMP280 pressure and temperature sensor whose output is processed by an Arduino Uno microcontroller and the final results are stored on a memory card. We provide the user experience of the device with an LCD display of current data, audible alerts when reaching certain altitudes, an altitude speed meter, and the ability to export data to a personal computer for future use.
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