#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <BlynkSimpleStream.h>
 
#define SCREEN_WIDTH 128    // OLED display width, in pixels
#define SCREEN_HEIGHT 64    // OLED display height, in pixels
#define OLED_RESET -1       // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
 
#define inSensor 2
#define outSensor 3
#define inSensorpr 17
#define outSensorpr 16
#define ledPin 4
 
int in;
int out;
int count;
int sensor1State = 0;
int lastSensor1State = 0;
int sensor2State = 0;
int lastSensor2State = 0;
 
void setup()
{
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C); //initialize with the I2C addr 0x3C (128x64)
  delay(2000);
  pinMode(2, INPUT);
  pinMode(3, INPUT);
  pinMode(16, OUTPUT);
  pinMode(17, OUTPUT);
 
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(20, 20);
  display.print("Visitor");
  display.setCursor(20, 40);
  display.print("Counter");
  display.display();
  delay(3000);
}
 
void loop()
{
  sensor1State = digitalRead(outSensor);
  if (sensor1State != lastSensor1State)
 {
   if (sensor1State == HIGH){

   count++; 
   in = in+1;
    }
   delay(500);
 }
     
  sensor2State = digitalRead(inSensor);
  if (sensor2State != lastSensor2State){
 {
   count--; 
   out = out+1;
    }  
   delay(500); 
 }
 
  if (count <= 0)
  {
    digitalWrite(ledPin, LOW);
    display.clearDisplay();
    display.setTextSize(2);
    display.setTextColor(WHITE);
    display.setCursor(0, 15);
    display.print("No Visitor");
    display.setCursor(5, 40);
    display.print("Light Off");
    display.display();
    delay(500);
  }

  else if (count >= 400)
  {
    digitalWrite(ledPin, HIGH);
    display.clearDisplay();
    display.setTextSize(1.9);
    display.setTextColor(WHITE);
    display.setCursor(15, 15);
    display.print("No More Visitor");
    display.setCursor(20, 40);
    display.print("Please Wait!");
    display.display();
    delay(500);
  }
  else
  {
    digitalWrite(ledPin, HIGH);
    display.clearDisplay();
    display.setTextColor(WHITE);
 
    display.setTextSize(1);
    display.setCursor(15, 0);
    display.print("Current Visitor");
    display.setTextSize(2);
    display.setCursor(50, 15);
    display.print(count);
 
    display.setTextSize(1);
    display.setCursor(0, 40);
    display.print("IN: ");
    display.print(in);
 
    display.setTextSize(1);
    display.setCursor(70, 40);
    display.print("OUT: ");
    display.print(out);
 
    display.display();
    delay(500);
  }

  lastSensor1State = sensor1State;
  lastSensor2State = sensor2State;
}