Introduction - If you have any usage issues, please Google them yourself
All data fusion (including the data of dmp output, such as the accelerometer data,
gyroscope, 6-axis quaternion and internal magnetometer data) via a 7-state, 13-mesurement
EKF(Extended Kalman filter)/Unscented Kalman Filter(UKF)/Cubature Kalman Filters (CKF) Algorithm/
Square-Root Cubature Kalman Filters (SRCKF) Algorithm.