hi again!

now that my starting-troubles are cleared, I have a more complex problem, and I hope you can help me...


I´m trying to draw a linegraph with data that comes trough a TCP socket stream.
the data is coming continuously at a speed of 100 samples per second. As the data comes trough TCP socket, the data is beeing "packaged", so I get a bounch of data about once per second (about 100 samples, but not exactly 100...)
I tried to write the data into an ArrayList (because the amount of bytes may vary), but this throws an error, so that I had to use a byteArray

I write the data like this:

1. public void readData(){
    
    
     if (myClient.available() > 0) {
     
       // Read in the bytes
        byteCount = myClient.readBytes(byteBuffer);
        myClient.clear();
      
       println (byteBuffer);
       println ("bytes:" +byteCount);    
        }
       
        
   

in draw() I splitt the interesting data and convert it to int and then draw the vertices like this:

1. for( i = 0; i<numbers.length;i++){
       vertex(i,200-numbers[i]);
        if (byteCount > 0 ) {
        {
     if ((byteBuffer[i]==36 ) && (byteBuffer[i+1]==18))
     {
      j=unhex(hex(byteBuffer[i+2])+(hex(byteBuffer[i+3])));
     
      numbers[numbers.length-1]=200-j/5;
      
      }
       }
       }
      
     }

every 1000 mills I call the funcition ReadData(), so the buffer is beeing filled again.

my problem is, I´m loosing data.

I found the BufferedInputReader, and I think it may be helpfull in my case, but I cannot find how to use it with TCP client.

I post the whole code of the sketch, may be you can give me some hints what I can do better...
At the moment the input is a rectangle at 1,1 Hz with 50% dutycycle, for the case anyone of you might try to run the sketch....

1. import processing.net.*;
   Client myClient;
   byte[] byteBuffer = new byte[503];
   int[] numbers = new int[499];
   
    int f =0;
    int i=0;
    int t=0;
    int j=0;
    int byteCount=0;
    
    // Declare a global time tracking variable
   long timeSinceLastEvent;
   long DELAY_BETWEEN_EVENTS = 1000;  // 1s
    
   void setup(){
     size(600,500);
     frameRate(15);
       myClient = new Client(this, "alano.dyndns.org", 9760);
     myClient.write("S");
    
    
    
    
    
   }
   
   void draw(){
     background(255);
    
    
   //GraphPaper
   for( i = 0 ;i<=width/10;i=i+1){
    stroke(200);
    line((-frameCount%10)+i*10,0,(-frameCount%10)+i*10,height);
    
    line(0,i*10,width,i*10);
   }
    
     noFill();
     stroke(0);
     beginShape();
     for( i = 0; i<numbers.length;i++){
       vertex(i,200-numbers[i]);
        if (byteCount > 0 ) {
        {
     if ((byteBuffer[i]==36 ) && (byteBuffer[i+1]==18))
     {
      j=unhex(hex(byteBuffer[i+2])+(hex(byteBuffer[i+3])));
     
      numbers[numbers.length-1]=200-j/5;
      
      }
       }
       }
      
     }
     endShape();
     for(t = 1; t<numbers.length;t++){
     numbers[t-1] = numbers[t];
    
      }
     
     
    
   
   
   if (millis() - timeSinceLastEvent > DELAY_BETWEEN_EVENTS)
     {
      readData();
       timeSinceLastEvent = millis();
     }
   
   
   }
   
   
   
   //////////////////////////////
   
   public void readData(){
    
    
     if (myClient.available() > 0) {
     
       // Read in the bytes
        byteCount = myClient.readBytes(byteBuffer);
        myClient.clear();
      
       println (byteBuffer);
       println ("bytes:" +byteCount);    
        }
       
        
   }
    
   
   

 thanks in advance for any input...

hi all,

I´m new to processing, and I need help with one maybe very easy issue...

I have to split a string. My separator is a "$".
I can splitt the string with other separators, but with $ it doesn´t function.
Is there a workaround?

I will apreciate any help.