public void SetVibration ( float leftMotor, float rightMotor )
{
if (!controller.IsConnected) return;
var uLeftMotor = (ushort)( leftMotor * 65535.0f );
var uRightMotor = (ushort)( rightMotor * 65535.0f );
controller.SetVibration(new Vibration {LeftMotorSpeed = uLeftMotor, RightMotorSpeed = uRightMotor});
}