Input.gyro.attitude returns zero values when tested with Moto G 4th generation device

Questions & Answers
1

Hi, being fairly new to unity, am using unity 5.4.0f3. I am working on a project which makes use of device gyroscope, if it exists, to give rotation to the main camera. I have tested the application on few devices, out of which Moto G 4th generation phone is the one, that I came across as of now, which even if has a gyroscope on it, gives zero values for Input.gyro.attitude. It is a device with 6.0.1 android and as mentioned ‘Unity Issue Tracker - Input.gyro.attitude doesn't output data from OrientationSensor’, there was one bug reported in unity about issues with getting gyro attitude values in newer devices(Android 6 or later)

I tried below code to debug the gyro values in phones:

using UnityEngine;
using System.Collections;

public class gyro : MonoBehaviour {

 Gyroscope gyr;

 // Use this for initialization
 void Start () {
     gyr = Input.gyro;
     if (SystemInfo.supportsGyroscope)
     {
         gyr.enabled = true;
         Debug.LogWarning("Gyro Enabled");
     }     
 }
 
 // Update is called once per frame
 void Update () {
     Debug.Log(gyr.attitude);
 }

}

Is the issue really solved or am I doing anything wrong here? Is there a workaround that I should be looking at for newer devices like this? Any help or suggestion would be great.

3

@sanketkale The Moto 4th generation phones and lower generation(i am not that sure about the lower gen phones, but sure about the 4th gens, since I have a moto G4 plus) do not have a compass or magnetometer, which is what Input.gyro.attitude uses.
If you want to use the gyroscope for AR, you need the compass/magnetometer, else the accelerometer will have to do.
There are some obvious trade-offs between the gyroscope and the accelerometer, but then, it’s a necessity.
@yuk27 how did the code work if the phone doesn’t have a compass/magnetometer? Do let me know, i would love to know. :slight_smile:

Thanks! :D, sorry if the answer is wrong or something, i just posted my own experience. If someone has a change, do let me know, bye <3

2

For anybody having this problem, I face it for a long time, in theory this problem was a bug on Unity that was resolved:

But even after that, the problem with gyro.attitude continued.

I found this thread that was really helpfull for me:

https://forum.unity3d.com/threads/gyroscope-quaternion-to-unity-camera-help-please.75288/

Where I found this code (Created by ulissescad):

float yRotation;
float xRotation;
void Start{

Input.gyro.enabled = true;
}
void Update{
yRotation += -Input.gyro.rotationRateUnbiased.y;
xRotation += -Input.gyro.rotationRateUnbiased.x;

transform.eulerAngles = new Vector3(xRotation, yRotation, 0);
}
4

Are you sure you enabled the gyro?

Input.gyro.enabled = true;
5

This works for me. Thanks a lot @yuk27 !