AccelerometerInputBehaviour

using UnityEngine;
using UnityEngine.UI;
using System.Collections;

public class AccelerometerInputBehaviour : MonoBehaviour {

    [HideInInspector]
    public float output;                        //Float output

    public enum AxisType { x,y,z }              //Accelered axis

    public AxisType axis;
    public float deadZone;
    public float maxAngle = 45;

    void Update () {
        float angle = 0;

        //Select axis
        switch (axis) {
        case AxisType.x:
            angle = Input.acceleration.x;
            break;
        case AxisType.y:
            angle = Input.acceleration.y;
            break;
        case AxisType.z:
            angle = Input.acceleration.z;
            break;
        }

        angle = angle * 90;

        //Clamp maximum
        angle = Mathf.Clamp(angle, -maxAngle, maxAngle);

        output = angle / 90 * (90 / maxAngle);

        //Apply deadZone
        var absoluteOutput = Mathf.Abs( output );
        if ( absoluteOutput < deadZone )
            output = 0;
    }
}