// Processing code for this example
 
 // Graphing sketch
 
 
 // This program takes ASCII-encoded strings
 // from the serial port at 9600 baud and graphs them. It expects values in the
 // range 0 to 1023, followed by a newline, or newline and carriage return
 
 // Created 20 Apr 2005
 // Updated 18 Jan 2008
 // by Tom Igoe
 // This example code is in the public domain.
 
 
 import processing.serial.*;
 
 Serial myPort;        // The serial port
 int xPos = 1;         // horizontal position of the graph
 
 //Serial input buffer
 String[] inData = new String[5];
 
 int counter = 0; //counter variable to track which data point number it is
 
 void setup () {
 // set the window size:
 size(400, 300);        
 
 // List all the available serial ports
 println(Serial.list());
 // I know that the first port in the serial list on my mac
 // is always my  Arduino, so I open Serial.list()[0].
 // Open whatever port is the one you're using.
 myPort = new Serial(this, Serial.list()[0], 57600);
 // don't generate a serialEvent() unless you get a newline character:
 myPort.bufferUntil('\n');
 // set inital background:
 background(0);

 }
 void draw () {
 //Draw the axis labels
  text("0C",5,300);
 text("20C",5,240);
 text("40C",5,180);
 text("60C",5,120);
 text("80C",5,60);
 text("100C",5,10);
 text("Purple is chamber temp",75,10);
 text("Red is set point",75,20);
 }
 
 void serialEvent (Serial myPort) {
// get the ASCII string:
 String inString = myPort.readStringUntil('\n');
 
 if (inString != null) {
 // trim off any whitespace:
 inString = trim(inString);
 
 //split the input string at the commas
 inData = split(inString,',');
 
 // convert temp to an int and map to the screen height:
 float temp = float(inData[0]); 
 temp = map(temp, 0, 100, 0, height);
 
 //prevent null pointer
  if(inData[1].equals(null))inData[1]="0";
 
 //convert setpoint to int and map to height
 float setpoint = float(inData[1]);
 setpoint = map(setpoint, 0, 100, 0, height);
 
 
 //increment the counter
 counter++;
 
 //only plot every 250th point
 if(counter == 50){
 counter = 0;
 
  // draw the temperature line:
 stroke(127,34,255);
 line(xPos, height, xPos, height - temp);
 
 //plot the setpoint
 stroke(204, 102, 0);
 point(xPos,height - setpoint);
 
 // at the edge of the screen, go back to the beginning:
 if (xPos >= width) {
 xPos = 0;
 background(0); 
 } 
 else {
 // increment the horizontal position:
 xPos++;
 }
 }
 }
 }