SerialPort connection, Unity stuck untill serial input is recived

Hello, I'm playing around with Serial input and Unity.

Here is my code, it is very simple but I have a problem. As long as Unity haven't recived any input through the serial it is stuck and I'm unable to do anything in the the unity editor. Which means that I can't stop the the execution of the game or select any objects in the Hieracy, untill I send some input through the SerialPort.

So my question is, what is the correct way of doing this? I have tried running it in a CoRoutine, but that didn't work out.

Code (csharp):

1. public class InputHandler : MonoBehaviour
2. {
3.     public static SerialPort sp = new SerialPort("COM3", 9600);
4.  
5.  // Use this for initialization
6.  void Awake ()
7.         {  
8.            sp.Open();
9.  }
10.  
11.  // Update is called once per frame
12.  void Update ()
13.     {
14.         if (sp.IsOpen)
15.         {
16.             print(sp.ReadChar());
17.         }
18.  
19.      }
20. }

 

Coroutines are run in the same thread so will block. You need either a none blocking way to check.the port or do the check.in a different thread.

 

Yea kinda tried in a diffrent thread, it didn't really wanna react to the input if I did that.