Issue with Unity's Input.compass.trueHeading and .magneticHeading returning the same values

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Hello Unity developers,

I’m using #Unity-2022-3-LTS for development on Android devices (Pixel 3 with Android 12 and Pixel 5 with Android 13). Currently, I’m facing an issue where Input.compass.trueHeading and Input.compass.magneticHeading return the same values.

Here is the script I’m using:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Location : MonoBehaviour
{
    public static Location Instance { set; get; }

    public float latitude;
    public float longitude;
    public float altitude;
    public int gps_count = 0;
    public string message;
    public float trueHeading;
    public float magneticHeading;
    public float compassAccuracy;
    public Quaternion gyroAttitude;
    public Vector3 eulerAngles;
    public float declination;

    private void Start()
    {
        Instance = this;
        DontDestroyOnLoad(gameObject);
        Input.gyro.enabled = false;
        Input.compass.enabled = false;
        Input.gyro.enabled = true;

        StartCoroutine(StartLocationService());
        Input.compass.enabled = true;
    }

    private IEnumerator StartLocationService()
    {
        // First, check if user has location service enabled
        if (!Input.location.isEnabledByUser)
        {
            Debug.Log("GPS not enabled");
            message = "GPS not enabled";
            yield break;
        }

        // Start service before querying location
        Input.location.Start();

        // Wait until service initializes
        int maxWait = 20;
        while (Input.location.status == LocationServiceStatus.Initializing && maxWait > 0)
        {
            yield return new WaitForSeconds(1);
            maxWait--;
        }

        // Service didn't initialize in 20 seconds
        if (maxWait <= 0)
        {
            Debug.Log("Timed out");
            message = "Timed out";
            yield break;
        }

        // Connection has failed
        if (Input.location.status == LocationServiceStatus.Failed)
        {
            Debug.Log("Unable to determine device location");
            message = "Unable to determine device location";
            yield break;
        }

        // Set locational information
        while (true)
        {
            latitude = Input.location.lastData.latitude;
            longitude = Input.location.lastData.longitude;
            altitude = Input.location.lastData.altitude;
            gyroAttitude = new Quaternion(-Input.gyro.attitude.x, -Input.gyro.attitude.y, -Input.gyro.attitude.z, Input.gyro.attitude.w);
            eulerAngles = gyroAttitude.eulerAngles;
            trueHeading = Input.compass.trueHeading;
            magneticHeading = Input.compass.magneticHeading;
            compassAccuracy = Input.compass.headingAccuracy;
            gps_count++;
            yield return new WaitForSeconds(1);
        }
    }
}

Details of the issue are as follows:

  • I’ve confirmed that GPS is successfully enabled.
  • Gyro sensor and compass are also enabled without any issues.
  • However, Input.compass.trueHeading and Input.compass.magneticHeading values are the same, and I’m not getting the expected behavior.

If anyone has encountered a similar issue or knows of a solution, could you please provide some advice?

I appreciate your help. Thank you.