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

// WiFi & Blynk
char auth[] = "YOUR_BLYNK_AUTH_TOKEN";     // Ganti dengan token dari Blynk
char ssid[] = "YOUR_WIFI_SSID";            // Nama WiFi
char pass[] = "YOUR_WIFI_PASSWORD";        // Password WiFi

// Sensor dan perangkat
#define DHTPIN 15
#define DHTTYPE DHT22
#define LEDPIN 18

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);
BlynkTimer timer;

// Fungsi pembacaan sensor
void sendSensor() {
  float suhu = dht.readTemperature();
  float kelembaban = dht.readHumidity();

  if (isnan(suhu) || isnan(kelembaban)) {
    Serial.println("Gagal membaca sensor!");
    return;
  }

  // Kirim ke LCD
  lcd.setCursor(0, 0);
  lcd.print("Suhu: ");
  lcd.print(suhu);
  lcd.print(" C  ");

  lcd.setCursor(0, 1);
  lcd.print("Lembab: ");
  lcd.print(kelembaban);
  lcd.print(" %  ");

  // Kirim ke Blynk
  Blynk.virtualWrite(V0, suhu);
  Blynk.virtualWrite(V1, kelembaban);

  // Log Serial
  Serial.print("Suhu: ");
  Serial.print(suhu);
  Serial.print(" C | Kelembaban: ");
  Serial.print(kelembaban);
  Serial.println(" %");

  // Kontrol LED otomatis dari suhu
  if (suhu < 20) {
    digitalWrite(LEDPIN, HIGH);
  } else {
    digitalWrite(LEDPIN, LOW);
  }
}

// Kontrol LED manual dari aplikasi Blynk
BLYNK_WRITE(V2) {
  int state = param.asInt();
  digitalWrite(LEDPIN, state);
}

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

  dht.begin();
  lcd.init();
  lcd.backlight();

  pinMode(LEDPIN, OUTPUT);

  WiFi.begin(ssid, pass);
  Blynk.begin(auth, ssid, pass);

  timer.setInterval(2000L, sendSensor);
}

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