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Question by user-2538 (google) · Nov 29, 2010 at 04:24 PM · namespace

System.IO.Ports

Hi,

Why Unity does not accept System.IO.Ports namespace?

Thanks.

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Answer by skovacs1 · Nov 29, 2010 at 05:17 PM

Because Unity did not include it in their subset of mono that they selected to include.

System.IO.Ports is used to access serial ports. As this is only meaningful for standalone desktop builds and would likely lead to difficulty and complications as Unity simply was not designed to provide direct hardware interfacing, it was likely deemed unnecessary. If you want this functionality, you will have to access it through a plug-in (Pro only) or some external Process that you start which does the work for you outside of Unity.

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Answer by TowerOfBricks · Nov 29, 2010 at 08:58 PM

I'm not sure about this, but you might be able to change the Mono subset to one which contains more classes, perhaps System.IO.Ports.

I think the setting is in the Project Settings-->Player Settings, down at the bottom. Per default it is .Net Subset.

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avatar image Greg 4 · Dec 16, 2010 at 07:55 PM 0
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Just wanted to Add this was tested on my machine (windows 7) and can confirm this fixed it for me ... to note I had to click on the little button for window settings then switched it from .net 2.0 subset to .net 2.0

avatar image briblue3 · Apr 18, 2017 at 09:28 PM 0
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This still works in Unity 5.5! Thank you!

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Answer by Prabhat95 · Jan 17, 2020 at 11:03 PM

Go to player settings ,other settings ,configuration,change api compatibility level to .NET 4.x Works in 2018.3. Hope it helps

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