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

// Konfigurasi Wi-Fi
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Konfigurasi ThingSpeak
unsigned long myChannelNumber = 2580629;
const char* myWriteAPIKey = "YPVCK80YSCJV73GW";

// Pin DHT22 dan LED
#define DHTPIN 4
#define DHTTYPE DHT22
#define LED_PIN 2

DHT dht(DHTPIN, DHTTYPE);

// Inisialisasi LCD (alamat I2C 0x27)
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Inisialisasi WiFi Client
WiFiClient client;

void setup() {
  Serial.begin(115200);
  dht.begin();
  lcd.init();
  lcd.backlight();
  pinMode(LED_PIN, OUTPUT);

  WiFi.begin(ssid, password);
  lcd.setCursor(0, 0);
  lcd.print("Menghub WiFi...");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    digitalWrite(LED_PIN, !digitalRead(LED_PIN));
  }
  lcd.setCursor(0, 0);
  lcd.print("WiFi Tersambung!");
  digitalWrite(LED_PIN, HIGH);
    delay(500);
    lcd.clear();
  ThingSpeak.begin(client);
}

void loop() {
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  if (isnan(humidity) || isnan(temperature)) {
    lcd.setCursor(0, 1);
    lcd.print("Sensor Error");
    return;
  }

  lcd.setCursor(0, 0);
  lcd.print("Suhu: " + String(temperature, 2) + "C ");
  lcd.setCursor(0, 1);
  lcd.print("Kelemb: " + String(humidity, 2) + "% ");

  ThingSpeak.setField(1, temperature);
  ThingSpeak.setField(2, humidity);

  int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  if (x == 200) {
    Serial.println("Berhasil mengirim data ke ThingSpeak!");
  } else {
    Serial.println("Gagal mengirim data ke ThingSpeak. Kode: " + String(x));
  }

  delay(20000);
}