Hi , im working on a telemetry project but i stucked.In theory everything is ok but in practice nothing happens.Program dont draw the graph.I just write the code for temp. sensor to try and used gwoptics library it doesnt matter i stucked in Serial event here is the code.Datas come from arduino with serial port and im reading this datas but i need graph.I will be very pleasure if you help me to draw the graph of temp. data.

1. import org.gwoptics.graphics.graph2D.Graph2D;
   import org.gwoptics.graphics.graph2D.LabelPos;
   import org.gwoptics.graphics.graph2D.traces.Line2DTrace;
   import org.gwoptics.graphics.graph2D.traces.ILine2DEquation;
   import processing.serial.*;
   
   Graph2D g1, g2  ;
   Serial arduino ;
   float tempXyer = 960; //sicaklik grafiginin başlama noktasi x ekseninde
   PrintWriter sicaklik ;
   
   void setup()
   {
     size(1300, 700);
     //seri port tanimlaniyor
     println(Serial.list());
     arduino = new Serial(this, Serial.list()[1], 9600);
     arduino.bufferUntil('\n');
     //grafik boyutu ve grafik tanımlanıyor
     g1 = new Graph2D(this, 400, 250, false);
     g2 = new Graph2D(this, 300, 250, false) ;
     //sicaklik için database oluşturma
     sicaklik = createWriter("sicaklik.txt") ;
     //grafik özellikleri
     g1.setYAxisMin(0);
     g1.setYAxisMax(160);
     g1.setXAxisMin(0);
     g1.setXAxisMax(300);
     g1.setXAxisLabel("Zaman (s)");
     g1.setYAxisLabel("Hız (Km/h)");
     g1.setXAxisTickSpacing(50);
     g1.setYAxisTickSpacing(10);
     g1.position.x = 70 ;
     g1.position.y = 30 ;
     g2.setYAxisMin(0);
     //2. grafik
     g2.setYAxisMax(50);
     g2.setXAxisMin(0);
     g2.setXAxisMax(300);
     g2.setXAxisLabel("Zaman (s) ");
     g2.setYAxisLabel("Sıcaklık (°C)");
     g2.setXAxisTickSpacing(50);
     g2.setYAxisTickSpacing(10);
     g2.position.x = 960 ;
     g2.position.y = 30 ;
     ellipseMode(CENTER);
   }
   
   void draw()
   {
     background(255) ;
     g1.draw() ;
     //g2.draw();
     stroke(0);
     ellipse(580, 175, 200, 200);
     ellipse(790, 175, 200, 200);
   }
   
   
   void serialEvent(Serial arduino)
   {
     String myString = arduino.readStringUntil('\n') ;
     if ( myString != null)
     {
       myString = trim(myString) ;
       //println(myString);
       float isi = float(myString) ;
   
       isi *= 5 ;
       //sicaklik grafigi 
       stroke(0);
       line(tempXyer, 280, tempXyer, 280-isi);
     }
   
   
     //sicaklik.txt e veriler depolaniyor
     sicaklik.println("Zaman :"+hour()+":"+minute()+":"+second()+" Sicaklik :" + myString);
     sicaklik.flush();
   
   
   
   
     if (tempXyer >= 1260 )
     {
       tempXyer=960;
       background(255);
     }
     else {
       tempXyer++ ;
     }
   }