The system variable deviceOrientation always contains the orientation of the device. The value of this variable will either be set 'landscape' or 'portrait'. If no data is available it will be set to 'undefined'. either LANDSCAPE or PORTRAIT.
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Related References
accelerationX
The system variable accelerationX always contains the acceleration of the device along the x axis.
accelerationY
The system variable accelerationY always contains the acceleration of the device along the y axis.
accelerationZ
The system variable accelerationZ always contains the acceleration of the device along the z axis.
deviceMoved
The deviceMoved() function is called when the device is moved by more than the threshold value along X, Y or Z axis.