Modifying First Person Controller with Potentiometer

Hi,

I would like to modify the First Person Controller Script included in the Standard Asset Package to be controlled by a potentiometer instead of a computer mouse. I already have the potentiometer's rotation mapped between -90 and 90 coming into Unity via Serial Port. I believe this is the area I am looking to modify for the rotation:

Code (CSharp):

1.         private void RotateView()
2.         {
3.             m_MouseLook.LookRotation (transform, m_Camera.transform);
4.         }

Now I have a different script that just doesn't work quite right because it maps the Y rotation to the rotation of the potentiometer instead of making it cumulative like the one above does. If it helps, here it is:

Code (CSharp):

1.         rotPot_Value = arduino_obj.GetComponent<serialPort>().rotate_Value; // get values from arduino-unity script
2.         gameObject.transform.localRotation = Quaternion.Euler(0, rotPot_Value, 0); // rotate head using this value