#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const int PIR_PIN = 27; 
const int LED_PIN = 25; 

int humanCount = 0;  
bool motionDetected = false;

void setup() {
  pinMode(PIR_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Initializing...");
  delay(2000);
  lcd.clear();
  lcd.print("Human Count: 0");
}

void loop() {
  motionDetected = digitalRead(PIR_PIN); 
  
  if (motionDetected) {
    digitalWrite(LED_PIN, HIGH); 
    humanCount++;               
    Serial.print("Human Count: ");
    Serial.println(humanCount);
    updateLCD(humanCount);       
    delay(1000);                 
  } else {
    digitalWrite(LED_PIN, LOW);  
  }
  
  delay(100); 
}

void updateLCD(int count) {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Human Count:");
  lcd.setCursor(0, 1);
  lcd.print(count);
}
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