Bidirectional Visitor Counter Using Arduino And IR Sensor

 CIRCUIT DIAGRAM :-

CODE :-  

#include <LiquidCrystal.h>

int  rs=7;

int en=8;

int d4=9;

int d5=10;

int d6=11;

int d7=12;

int ir1=4;

int ir2=2;

int val1;

int val2;

int count=0;

LiquidCrystal lcd(rs,en,d4,d5,d6,d7);  

void setup() {

  // put your setup code here, to run once:

pinMode(ir1,INPUT);

pinMode(ir2,INPUT);

Serial.begin(9600);

lcd.begin(16,2);

  lcd.print("Person In Room:");

  lcd.setCursor(0,1);

  lcd.print(count);

}

void loop() {

  // put your main code here, to run repeatedly:

val1=digitalRead(ir1);

val2=digitalRead(ir2);

if (val1==0) {

  count=count+1;

  Serial.println(count);

  lcd.clear();

lcd.setCursor(0,0);

  lcd.print("Person In Room:");

  lcd.setCursor(0,1);

  lcd.print(count);

  delay(1000);

}

if (val2==0) {

  count=count-1;

  Serial.println(count);

  lcd.clear();

lcd.setCursor(0,0);

  lcd.print("Person In Room:");

  lcd.setCursor(0,1);

  lcd.print(count);

  delay(1000);

}

 

}