Firmware on the v1.3 is currently only for MetaMotion boards. You will need to use the latest APIs (iOS v2.8.0, Android v2.8.0 or v3.0.0-beta03, or C++ v0.7.0) to use the features provided on this release branch.
Improved battery life for MetaMotion boards
Added support for full sensor fusion output to be used with the time filter
Provides users with a way to control the output data rate of sensor fusion data
Added power and battery charging status notifications
Fixed issues interrupts on the BMI60 IMU
Addresses a critical bug on MetaMotion boards that occured when streaming accelerometer, gyro, and magnetometer data simultaneously.