#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <LiquidCrystal_I2C.h>

const int speaker_pin = 5;    
const int pirdata = 15;
int led = 12;    
int pirstate = LOW;           
int value = 0;

LiquidCrystal_I2C lcd(0x27, 16, 2);

char auth[] = "YourAuthToken"; // Replace with your Blynk auth token
char ssid[] = "YourNetworkName"; // Replace with your WiFi network name
char pass[] = "YourPassword"; // Replace with your WiFi password

BlynkTimer timer;

void setup() {
  pinMode(led, OUTPUT);
  pinMode(speaker_pin, OUTPUT); 
  pinMode(pirdata, INPUT);      
  Serial.begin(9600);

  lcd.init();
  lcd.backlight();

  ledcSetup(0, 5000, 8);  
  ledcAttachPin(speaker_pin, 0); 

  WiFi.begin(ssid, pass);
  while (WiFi.status()!= WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }

  Serial.println("Connected to WiFi");
  Blynk.begin(auth, ssid, pass);
  timer.setInterval(1000L, sendSensorData); // Send sensor data every 1 second
}

void sendSensorData() {
  int pirValue = digitalRead(pirdata);
  Blynk.virtualWrite(V1, pirValue); // Send sensor data to Blynk
}

void loop() {
  Blynk.run();
  timer.run();

  value = digitalRead(pirdata);
  if (value == HIGH) {
    if (pirstate == LOW) {
      
      digitalWrite(led, HIGH);
      ledcWriteTone(0, 1000);
      delay(500); 
      ledcWriteTone(0, 0); 
      Serial.println("Seseorang atau object terdeteksi!");
      pirstate = HIGH;

      lcd.setCursor(0,0);
      lcd.print("seseorang mendekati area terlarang");
    }
  } else {
    if (pirstate == HIGH) {
      Serial.println("Tidak ada object terdeteksi!");
      digitalWrite(led, LOW);
      pirstate = LOW;
    }
  }
}