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Question by smirlianos · Dec 27, 2020 at 07:08 PM · fpsmultithreadingportserial

How to stop waiting on Serial Output

I have this code that reads the serial port from a serial connection to an arduino board

 void Update()
     {
         receivedString = data_stream.ReadLine();
         //do stuff
      }

My problem is, that Unity waits until a new line is sent on the Serial connection, resulting in very low fps.

How can I make Unity run normally until a new line is printed on the Serial? I hope this does not require a multithreading solution...

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Answer by hsmoon5458 · Jan 21, 2021 at 08:08 PM

One easy wat to boost up your fps is, read the data stream fast manually.

you can use InvokeRepeating function to do that.

This video might help

https://www.youtube.com/watch?v=7BvnNUOR0oI&t=1s

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Answer by andrew-lukasik · Jan 26, 2021 at 10:54 PM

Threading doesn't has to be complicated you know

 using System.Threading.Tasks;
 
 async void Start ()
 {
     while( this.enabled )
     {
         receivedString = await Task.Run( () => {
             try
             {
                 return data_stream.ReadLine();
             }
             catch( System.Exception ex )
             {
                 Debug.LogException( ex );
                 return "- exception -";
             }
         } );
         Debug.Log($"received string: '{receivedString}'");
 
         await Task.Delay( 1000 );
     }
 }
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