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

// Kredensial WiFi
const char* ssid = "BarraIbnuHasan";
const char* password = "barraibnuhasan12";

// ThingSpeak
unsigned long myChannelNumber = 2717691;
const char* myWriteAPIKey = "HE4RLIL98RPXARXX";

// Sensor DHT
#define DHTPIN 15
#define DHTTYPE DHT22 // Menggunakan DHT22

// LCD I2C
LiquidCrystal_I2C lcd(0x27, 20, 4);

// LED Pins
#define WIFI_LED 2
#define THINGSPEAK_LED 4

// Informasi Pribadi
const char* nama = "Eko Desyan S";
const char* nim = "4122110102";

WiFiClient client;
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  dht.begin();
  
  // Inisialisasi LCD
  lcd.init();
  lcd.backlight();
  
  // Inisialisasi LED
  pinMode(WIFI_LED, OUTPUT);
  pinMode(THINGSPEAK_LED, OUTPUT);
  
  // Tampilkan informasi pribadi
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Nama: ");
  lcd.print(nama);
  
  lcd.setCursor(0, 1);
  lcd.print("NIM : ");
  lcd.print(nim);
  
  // Koneksi WiFi
  WiFi.begin(ssid, password);
  lcd.setCursor(0, 2);
  lcd.print("Connecting WiFi");
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    lcd.print(".");
  }
  
  digitalWrite(WIFI_LED, HIGH);
  
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Nama: ");
  lcd.print(nama);
  
  lcd.setCursor(0, 1);
  lcd.print("NIM : ");
  lcd.print(nim);
  
  lcd.setCursor(0, 2);
  lcd.print("WiFi Connected");
  
  lcd.setCursor(0, 3);
  lcd.print("IP: ");
  lcd.print(WiFi.localIP());
  
  delay(3000);
  
  ThingSpeak.begin(client);
}

void loop() {
    float h = dht.readHumidity();
    float t = dht.readTemperature();

    if (isnan(h) || isnan(t)) {
        Serial.println("Gagal membaca dari sensor DHT!");
        lcd.setCursor(0, 2);
        lcd.print("Sensor Error       ");
        lcd.setCursor(0, 3);
        lcd.print("                    ");
        delay(2000);
        return;
    }

    Serial.print("Suhu: ");
    Serial.print(t);
    Serial.print(" °C, Kelembaban: ");
    Serial.print(h);
    Serial.println(" %");

    // Tampilkan di LCD
    lcd.clear();
    lcd.setCursor(3, 0);
    lcd.print("Monitoring Suhu");

    lcd.setCursor(1, 1);
    lcd.print("& Kelembaban Ruang");
    
    lcd.setCursor(0,2);
    lcd.print("Suhu:");
    lcd.print(t); // Menampilkan suhu
    lcd.print((char)223); // Simbol derajat Celsius
    lcd.print("C"); // Menambahkan 'derajat C'
    
    lcd.setCursor(0,3);
    lcd.print("Kelembaban:");
    lcd.print(h); 
    lcd.print("%      "); 

   ThingSpeak.setField(1, t); // Mengirim suhu ke field pertama
   ThingSpeak.setField(2, h); // Mengirim kelembaban ke field kedua

   // Kirim ke ThingSpeak
   digitalWrite(THINGSPEAK_LED, HIGH);
   int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);

   if (x == 200) {
     Serial.println("Channel update berhasil.");
     
   } else {
     Serial.println("Gagal update channel. HTTP error code " + String(x));
    
   }
   
   digitalWrite(THINGSPEAK_LED, LOW);

   delay(20000); // Tunggu sebelum pembaruan berikutnya
}