#define BLYNK_TEMPLATE_ID "TMPL6bG1F4hxQ"
#define BLYNK_TEMPLATE_NAME "Lampu Otomatis"
#define BLYNK_AUTH_TOKEN "W33XxFLXFM3VI5JM7WX6At50bw2UTGHV"

//Include the library files
#include <LiquidCrystal_I2C.h>
#include <BlynkSimpleEsp32.h>
#define BLYNK_PRINT Serial

//Init the LCD Display
LiquidCrystal_I2C lcd(0x27, 16,2);

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

BlynkTimer timer;

#define LDRPin 27
#define LEDPin 2

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

void setup() {
  Serial.begin(115200);
  lcd.init();
  lcd.setBacklight(HIGH);

  pinMode(LDRPin, INPUT);
  pinMode(LEDPin, OUTPUT);
  Blynk.begin(auth, ssid, pass, "blynk.cloud", 80);

  timer.setInterval(100L, sendSensorData);
}

void sendSensorData() {
  int lightValue = analogRead(LDRPin);
  float voltage = lightValue * 5/4095.0;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

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

  Blynk.virtualWrite(V0, lux);

  lcd.setCursor(0, 0);
  lcd.print("Cahaya: ");
  lcd.print(lux);
  lcd.setCursor(0,1);

  if(lux <= 200) {
    lcd.setCursor(0,1);
    digitalWrite(LEDPin, HIGH);
    lcd.print("LED NYALA");
  }

  else if(lux > 200) {
    lcd.setCursor(0,1);
    digitalWrite(LEDPin, LOW);
    lcd.print("LED MATI ");
  }
}

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