Access Surface Pro accelerometer data via DLL

Scripting C# & .NET
1

Hello guys, I’m trying to find a solution to access the accelerometer input since the standard Input.acceleration doesn’t seem to work in the unity editor when on a Surface tablet (and yes I switched my build platform).
I’ve read that the easiest way is to create a DLL and read the data directly, but my problem is that in order for a DLL to work in unity, the .NET framework has to be set to 3.5, and all the code I’ve found (using Windows.Devices.Sensors) seems to be needing version 4 at least.
I have made apps both in C# and C++ that read the data from the Surface but cannot find a way to import them in unity.

Here is an example:

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Windows.Foundation;
using Windows.Foundation.Collections;

// Required to support the core dispatcher and the accelerometer
using Windows.UI.Core;
using Windows.Devices.Sensors;



using System.Runtime.InteropServices;





namespace ClassLibrary3
{
    public class ClassLibrary3
    {

        public static Accelerometer _accelerometer;
        public static AccelerometerReading reading;


        public static void Init()
        {
            _accelerometer = Accelerometer.GetDefault();

            if (_accelerometer != null)
            {
                // Establish the report interval
                uint minReportInterval = _accelerometer.MinimumReportInterval;
                uint reportInterval = minReportInterval > 16 ? minReportInterval : 16;
                _accelerometer.ReportInterval = reportInterval;

            }
        }

        public static double getAccelerationX()
        {
            return _accelerometer.GetCurrentReading().AccelerationX;
        }
    }

}

This works fine as a standalone, but when I switch Target framework under Project->properties to 3.5, it fail, saying

1>C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets(1820,5): warning MSB3258: The primary reference “Windows” could not be resolved because it has an indirect dependency on the .NET Framework assembly “mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089” which has a higher version “4.0.0.0” than the version “2.0.0.0” in the current target framework.

and a buch more errors.

Does anybody know how such a DLL that reads accelerometer input from the Surface Pro and makes it available to unity somehow?
Thank you guys for your support and help!

2

Hi did you find any solution?
I am sitting at the same problem know :slight_smile:

Thanks, Matthias

3

Have you tried closing unity and deleting Library folder under project directory and then opening editor again?