An adaptation of the miniwinwm/WMM_Tiny code for calculating magnetic variation.
A small embedded C99 implementation of the World Magnetic Model published by NOAA for calculating the magnetic field variation at any point on the world's surface for a given date in the years 2020 to 2025.
Maintainer: David Armstrong
This library is compatible with all architectures so you should be able to use it on all the Arduino boards.
To use this library, open the Library Manager in the Arduino IDE and install it from there.