int sensorPin1 = 14;   // IR sensor 1
int sensorPin2 = 13;   // IR sensor 2
int ledPin1 = 19;      // LED for person entry
int ledPin2 = 18;      // LED for person exit
int counter = 0;       // Initialize counter to track the number of people

void setup()
{
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(sensorPin1, INPUT);
  pinMode(sensorPin2, INPUT);
  Serial.begin(9600);  // Start serial communication
}

void loop()
{
  int sensor1State = digitalRead(sensorPin1);  // Read the state of sensor 1
  int sensor2State = digitalRead(sensorPin2);  // Read the state of sensor 2

  if (sensor1State == HIGH && sensor2State == LOW)  // Person entered (sensor 1 triggered)
  {
    counter++;  // Increase counter by 1
    digitalWrite(ledPin1, HIGH);  // Turn on LED 1 to indicate entry
    digitalWrite(ledPin2, LOW);   // Turn off LED 2
    Serial.print("Person entered the room. Counter: ");
    Serial.println(counter);
    delay(500);  // Short delay to avoid rapid state changes
  }
  else if (sensor1State == LOW && sensor2State == HIGH)  // Person exited (sensor 2 triggered)
  {
    counter--;  // Decrease counter by 1
    digitalWrite(ledPin1, LOW);   // Turn off LED 1
    digitalWrite(ledPin2, HIGH);  // Turn on LED 2 to indicate exit
    Serial.print("Person exited the room. Counter: ");
    Serial.println(counter);
    delay(500);  // Short delay to avoid rapid state changes
  }
  else  // No person detected
  {
    digitalWrite(ledPin1, LOW);   // Turn off LED 1
    digitalWrite(ledPin2, LOW);   // Turn off LED 2
    Serial.println("No person detected");
    delay(500);  // Short delay
  }
}