Arduino and processing based GUI person counter

In this post, we will make arduino and processing based GUI person counter. For person counter, we are using infrared sensor (IR). It's output is digital and is fed to pin number 7 of arduino.

The connections are as follows:

Connection of arduino with proximity sensor

Arduino Code:

int switchPin=7;
int ledPin=13;

void setup() {
pinMode(switchPin,INPUT);
digitalWrite(switchPin,HIGH);
pinMode(ledPin,OUTPUT);
Serial.begin(9600);
}

void loop() {
  if(digitalRead(switchPin))
    {
    while(digitalRead(switchPin));        
    Serial.print(1,DEC);
    }
  else
    {
    Serial.print(0,DEC);
    }
    delay(100);
} 

Processing Code:

import processing.serial.*;

Serial port;
int val;
int count=0;
PFont f;                           // STEP 1 Declare PFont variable

void setup()  {
    size(400,400);
    noStroke();
    println(Serial.list());  // print list of available serial port 
    port=new Serial(this,Serial.list()[0],9600);        
    f = createFont("Arial",16,true); // STEP 2 Create Font
 }
  
void draw()  {
  if(0<port.available())
  {
    val=port.read();
  } 
    background(204);
    println(val);

  if(val==48)
{     fill(255,0,0);   // red
  rect(50,50,300,300);  // green
}
  else if(val==49)
{     fill(0,255,0);   // green
  rect(50,50,300,300);  // green
  count++;
}

  textFont(f,30);               
  fill(0);                         
  text("Number of Person is: " + count , 30, 30);
//text(count, 100, 100);
delay(100);

 }

/* END OF CODE */

GUI of Processing:

GUI of processing

Video: