// 1. Identitas Blynk
#define BLYNK_TEMPLATE_ID "MASUKKAN_ID_DISINI"
#define BLYNK_TEMPLATE_NAME "Monitoring Suhu"
#define BLYNK_AUTH_TOKEN "MASUKKAN_TOKEN_DISINI"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>
#include <Wire.h>                    // ✅ Tambahan untuk I2C
#include <LiquidCrystal_I2C.h>       // ✅ Tambahan untuk LCD

// 2. Konfigurasi WiFi & Sensor
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

#define DHTPIN 15
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// ✅ Inisialisasi LCD (alamat 0x27, 16 kolom, 2 baris)
LiquidCrystal_I2C lcd(0x27, 16, 2);

BlynkTimer timer;

// 3. Fungsi Kirim Data Sensor
void kirimDataSensor() {
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  // Cek jika sensor gagal terbaca
  if (isnan(h) || isnan(t)) {
    Serial.println("Gagal membaca sensor DHT!");

    // ✅ Tampilkan error di LCD
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Sensor Error!");
    return;
  }

  // Kirim data ke Virtual Pin Blynk
  Blynk.virtualWrite(V1, t);
  Blynk.virtualWrite(V2, h);

  // ✅ Tampilkan data di LCD
  lcd.clear();
  lcd.setCursor(0, 0);           // Baris pertama
  lcd.print("Suhu : ");
  lcd.print(t, 1);               // 1 angka desimal
  lcd.print(" C");

  lcd.setCursor(0, 1);           // Baris kedua
  lcd.print("Lembab: ");
  lcd.print(h, 1);
  lcd.print(" %");

  // Tampilkan di Serial Monitor
  Serial.print("Suhu: ");
  Serial.print(t);
  Serial.print("°C | Kelembapan: ");
  Serial.print(h);
  Serial.println("%");
}

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

  // ✅ Inisialisasi LCD
  Wire.begin(21, 22);            // SDA = GPIO21, SCL = GPIO22
  lcd.init();
  lcd.backlight();               // Nyalakan backlight LCD

  // ✅ Tampilan awal LCD saat booting
  lcd.setCursor(0, 0);
  lcd.print("  Monitoring  ");
  lcd.setCursor(0, 1);
  lcd.print(" Suhu & Lembab");
  delay(2000);                   // Tampil 2 detik

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Connecting WiFi");
  
  Blynk.begin(auth, ssid, pass);

  // ✅ Tampilkan status setelah terhubung
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("WiFi Connected!");
  delay(1500);

  timer.setInterval(2000L, kirimDataSensor);
}

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