#define BLYNK_TEMPLATE_ID "TMPL6rQEXIXrt"
#define BLYNK_TEMPLATE_NAME "LAMPU OTOMATIS"
#define BLYNK_AUTH_TOKEN "YsLqJLHAjF_AAQsbn2t_x0JEhYkQDA6s"

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

#define LDR_PIN 33   
#define BUZZER 19 
#define RELAY 23  

const char* ssid = "Wokwi-GUEST";
const char* password = ""; 

char auth[] = BLYNK_AUTH_TOKEN;  

WiFiClient client;

LiquidCrystal_I2C lcd(0x27, 16, 2);

const float GAMMA = 0.7;
const float RL10 = 50;

void setup() {
  Serial.begin(115200);

  // Koneksi ke WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  // Mulai koneksi Blynk
  Blynk.begin(auth, ssid, password);

  pinMode(LDR_PIN, INPUT);
  pinMode(BUZZER, OUTPUT);
  pinMode(RELAY, OUTPUT);

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

void loop() {
  // Membaca nilai dari LDR
  int analogValue = analogRead(LDR_PIN);
  float voltage = analogValue / 4095.0 * 5.0; 
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Intensitas: ");
  lcd.print(lux);

  Serial.print("Intensitas Cahaya: ");
  Serial.println(lux);

  lcd.setCursor(0, 1);

  if (lux > 500) {
    lcd.print("Lampu Mati");
    Serial.println("Kondisi Ruangan Sedang Terang");
    digitalWrite(RELAY, LOW);
    noTone(BUZZER);
  } else {
    lcd.print("Lampu Menyala");
    Serial.println("Kondisi Ruangan Sedang Gelap");
    digitalWrite(RELAY, HIGH);
    tone(BUZZER, 1000);
  }

  // Kirim data ke Blynk
  Blynk.virtualWrite(V0, lux);  // Kirim nilai lux ke virtual pin V0
  Blynk.virtualWrite(V1, RELAY);
  // Jalankan Blynk
  Blynk.run();

  delay(500); 
}