MadgwickAHRSPlugin provides primitive access to the MadgwickAHRS functions by Sebastian Madgwick. MadgwickAHRS provides access to the MadgwickAHRS primitives. MadgwickAHRSTest exercises the MadgwickAHRS primitives Source code for and information about the library is at http://www.x-io.co.uk/open-source-imu-and-ahrs-algorithms/ This plugin is licensed MIT. The MadgwickAHRS library is GPL, and should therefore be installed separately as a library on the host system, and linked dynamically to the plugin.