If the second parameter (setting) is set to 1, the sensor bar from the Wii U GamePad will be enabled.
Any other values will disable it.
Thanks to QuarkTheAwesome for mentioning this on Twitter :)
Added VPADSetTPCalibrationParam, VPADGetTPCalibrationParam, VPADGetTPCalibratedPoint and VPADGetTPCalibratedPointEx.
The VPADData struct is filled completely, no unknown sections are left.
gyro.x = Rotation speed around X (horizontal) axis
gyro.y = Rotation speed around Y (depth) axis
gyro.z = Rotation speed around Z (vertical) axis
angle.x = Rotation around X (horizontal) axis
angle.y = Rotation around Y (depth) axis
angle.z = Rotation around Z (vertical) axis