Resolved can't use System.IO.Ports

hi every body
i want conect with serial port but when I use "using System.IO.Ports;" I take this error:

"Assets/NewBehaviourScript.cs(5,17): error CS0234: The type or namespace name `Ports' does not exist in the namespace `System.IO'. Are you missing an assembly reference?"

but here is some method for serial port like "BaudRate" and unity Forecast "Ports" from "System.IO"
please help me

and my code is here :

Code (csharp):

1. using UnityEngine;
2. using System.Collections;
3. using System.IO.Ports;
4. public class NewBehaviourScript : MonoBehaviour {
5.      SerialPort serial1;
6.     // Use this for initialization
7.     void Start () {
8.     serial1=new SerialPort();
9.     }
10.    
11.     // Update is called once per frame
12.     void Update () {
13.    
14.     }
15.     void OnGUI()
16.     {
17.         if(GUI.Button(new Rect(10,10,100,50),"send"))
18.         {
19.             serial1.PortName="COM1";
20.             serial1.Parity=Parity.None;
21.             serial1.BaudRate=9600;
22.             serial1.DataBits=8;
23.             serial1.StopBits=StopBits.One;
24.             serial1.Open();
25.             serial1.Write("hi unity");
26.             serial1.Close();
27.            
28.            
29.         }
30.     }
31. }

 

Hi, your problem is the .net configuration, use the .NET 2.0 (not subset) and will connect. I was able to transmit data, but not to receive. Config is into Edit>ProjectSettings>Player>ApiCompatibilityLevel.

 

THANKS A LOT .
I very wanted it.
and for reading data you can use it :
but it read hex :

Code (csharp):

1. using UnityEngine;
2. using System.Collections;
3. using System.IO.Ports;
4.  
5. public class NewBehaviourScript : MonoBehaviour {
6.      SerialPort serial1;
7.      byte[] buf = new byte[4]; // creates a byte array the size of the data you want to receive.
8.      int bufCount = 0;
9.      int a,b;
10.     // Use this for initialization
11.     void Start () {
12.     serial1=new SerialPort();
13.     }
14.    
15.     // Update is called once per frame
16.     void Update () {
17.    
18.     }
19.     void OnGUI()
20.     {
21.         if(GUI.Button(new Rect(10,10,100,50),"read"))
22.         {
23.             serial1.PortName="COM1";
24.             serial1.Parity=Parity.None;
25.             serial1.BaudRate=9600;
26.             serial1.DataBits=8;
27.             serial1.StopBits=StopBits.One;
28.             serial1.Open();
29.             bufCount = 0;
30.             bufCount += serial1.Read(buf, bufCount, buf.Length - bufCount);
31.  
32.             a = 0;
33.             b = 0;
34.             while (a < bufCount)
35.             {
36.                 b += buf[a];
37.                 a++;
38.             }
39.             print(b);
40.             serial1.Close();
41.            
42.            
43.         }
44.     }
45. }

and I thank you again

 

wow thanks a lot

 

Hi, thanks for your code, but I have a problem... I need to read data after sending a command (the command is "D\r").
Do you know a solution? (the received data is a velocity...)

 

Thank you

 

Unity 2017.4.15,



show errors:
IOException: 拒绝访问。

 

and cannot change to .Net 2.0 for the System.IO.Ports based on .net 4.0

 

Thank you soooo much! Worked perfectly!

 

I got the same error on Unity 2018.3.2f1. None of the above posts helped. However, I found a work around that I explained here.

 

None of these solutions are working for me. I don't see a .net 2.0 subset... I only have ".NET standard 2.0" and ".NET 4.x"

Anyone have any new updates on this issue?

 

snelson_unity:
So here's what I had to do and it has worked every since. You need to reference the old ..io.ports from a previous .Net. I found mine in C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.dll. I also found some System.io.ports namespaces when looking in my reference assembly Frame work directories. Some are in the System.dll or the System.IO. dll and if your lucky you will actually find a System.IO.Ports.dll file. This latter is pretty old and I can't and won't vouch for its efficiency but hey use what you got.

 

Go to Edit->projectsettings->Player->APIcompetibilityLevel = .Net4.x
This worked for me.

 

Thanks, helped me

 

Howdy, The above solutions did not work for me unfortunately. Found a fix that did however. My target platform is Windows and I changed the architecture in build settings from x86_64 to x86. After that System.IO.Ports was referenceable.

 

This worked for me! Thanks I switched back to x86_64 after doing the fix and its still working

 

To make it work in Unity 2020 with System.IO.Ports, as said above, change the APIcompetibilityLevel:

• Edit->projectsettings->Player->APIcompetibilityLevel = .Net4.x

If you still have errors in Visual Studio, you need to change the architecture as said above:

• File -> BuildSettings -> Architecture = x86

And then you can switch back:

• File -> BuildSettings -> Architecture = x86_64

 

Thank you, it is very helpful

 

yes it worked! thanks

 

GENIO!!!!

 

Correct, this way works perfectly with 2020.3.26f1

 

Note: On version 2021.3.x, the.NET 4.x is the .NET Framework (without version number)

 

i am having same issue. i can't find the api compatability level under player settings:

Using unity version 2022.1.11f1
@Fenikkel can you help me?

 

Expand "other settings"

 

Sorry for the late. Do as @Jesse_Pixelsmith said!