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System.DllNotFoundException: MonoPosixHelper is thrown when calling System.IO.Ports.SerialPort constructor on Mobile devices



Reproduction steps:
1) Download and open attached project
2) Build and run "test.unity" scene on an Android device
3) Watch device's logs
-- Notice that System.DllNotFoundException: MonoPosixHelper is thrown (and one line above - unable to find MonoPosixHelper)

MonoPosixHelper is found inside Editor and Standalone builds (both Windows and Mac)

Reproduced with:
2017.3.0a3, 2017.1.0f3, 5.6.3f1, 5.5.4p2, 5.4.6f1

Devices under testing:
Xiaomi Mi Max, Android 6.0
LG G3, Android 5.0,
Huawei P9, Android 7.0
iPhone 6, iOS 10.3.3

Reproduced on iOS and Android

Resolution: MonoposixHelper is not currently deployed on mobile. We can consider implementing this functionality but have no plans to do so currently.

Comments (4)

  1. SehrStark

    Sep 25, 2017 00:37

    I have the same issue in MacOS with a standalone build too. (Works fine in editor for me too).

  2. NGC6543

    Sep 12, 2017 05:00

    I have the same problem with Unity Standalone for macOS.
    In the editor it works just fine. Only built app throws the exception.

  3. visualbruno

    Sep 10, 2017 06:15

    Not fixed in Unity 2017.1.1p1

  4. visualbruno

    Sep 03, 2017 18:47

    I have the same problem with Unity 2017.1.0p4 and 2017.1.0p5

    A workaround is to build with IL2CPP.

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