Access Surface Pro accelerometer data via DLL

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:

Code (CSharp):

1. using System;
2. using System.Collections.Generic;
3. using System.IO;
4. using System.Linq;
5. using Windows.Foundation;
6. using Windows.Foundation.Collections;
7.  
8. // Required to support the core dispatcher and the accelerometer
9. using Windows.UI.Core;
10. using Windows.Devices.Sensors;
11.  
12.  
13.  
14. using System.Runtime.InteropServices;
15.  
16.  
17.  
18.  
19.  
20. namespace ClassLibrary3
21. {
22.     public class ClassLibrary3
23.     {
24.  
25.         public static Accelerometer _accelerometer;
26.         public static AccelerometerReading reading;
27.  
28.  
29.         public static void Init()
30.         {
31.             _accelerometer = Accelerometer.GetDefault();
32.  
33.             if (_accelerometer != null)
34.             {
35.                 // Establish the report interval
36.                 uint minReportInterval = _accelerometer.MinimumReportInterval;
37.                 uint reportInterval = minReportInterval > 16 ? minReportInterval : 16;
38.                 _accelerometer.ReportInterval = reportInterval;
39.  
40.             }
41.         }
42.  
43.         public static double getAccelerationX()
44.         {
45.             return _accelerometer.GetCurrentReading().AccelerationX;
46.         }
47.     }
48.  
49. }

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!

 

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

Thanks, Matthias

 

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