#include <WiFi.h> // library untuk mengakses WiFi
#include <DHTesp.h> // library untuk mengakses Sensor DHT
#include <ThingSpeak.h> // library untuk akses ke aplikasi ThingSpeak
#include <Wire.h> // library untuk komunikasi I2C
#include <LiquidCrystal_I2C.h> // library untuk mengakses LCD melalui I2C

const int DHT_PIN = 15; // Inisialisasi sensor suhu

// Inisialisasi pin LED
const int RED_LED_PIN = 18;
const int GREEN_LED_PIN = 19;
const int BLUE_LED_PIN = 2;
const int YELLOW_LED_PIN = 23;

// Inisialisasi LCD menggunakan I2C
LiquidCrystal_I2C lcd(0x27, 16, 2); // Alamat I2C dan jumlah kolom dan baris pada LCD

// Inisialisasi Wifi
const char* ssid = "Wokwi-GUEST";
const char* pass = "";

WiFiClient client;

// Inisialisasi ThingSpeak
unsigned long myChannelNumber = 2;
const char* myWriteAPIKey = "CXAN3HWQAMWO8ET6";
const char* server = "api.thingspeak.com";

unsigned long lastTime = 0;
unsigned long timerDelay = 30000; // atur interval update ke ThingSpeak

float temperatureC;
float humidity;

DHTesp dhtSensor;

void setup() {
  Serial.begin(115200);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  dhtSensor.getPin();
  delay(10);
  
  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(GREEN_LED_PIN, OUTPUT);
  pinMode(BLUE_LED_PIN, OUTPUT);
  pinMode(YELLOW_LED_PIN, OUTPUT);

  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }
  Serial.println();
  Serial.println("WiFi Tersambung!");
  Serial.println(WiFi.localIP());

  WiFi.mode(WIFI_STA);

  // Nyalakan LED Kuning sebagai indikator data masuk
  digitalWrite(YELLOW_LED_PIN, HIGH);
  delay(2000);
  digitalWrite(YELLOW_LED_PIN, LOW);

  ThingSpeak.begin(client);

  // Inisialisasi I2C
  Wire.begin();

  // Inisialisasi LCD melalui I2C
  lcd.init(); // Inisialisasi LCD
  lcd.backlight(); // Nyalakan backlight LCD
  lcd.begin(16, 2); // Mengatur jumlah kolom dan baris pada LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temperature:");
  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
}

void loop() {
  temperatureC = dhtSensor.getTemperature();
  Serial.print("Temperature (°C): ");
  Serial.println(temperatureC);
  humidity = dhtSensor.getHumidity();
  Serial.print("Humidity (%): ");
  Serial.println(humidity);

  ThingSpeak.setField(1, String(temperatureC, 1)); // Mengonversi float ke String dengan 1 digit desimal
  ThingSpeak.setField(2, String(humidity, 1)); // Mengonversi float ke String dengan 1 digit desimal

  // Menampilkan data suhu dan kelembaban pada LCD


  lcd.setCursor(10, 0); // Mengatur posisi cursor LCD
  lcd.print(temperatureC, 1); // Menampilkan 1 digit desimal
  lcd.print(" C");
  lcd.setCursor(10, 1); // Mengatur posisi cursor LCD
  lcd.print(humidity, 1); // Menampilkan 1 digit desimal
  lcd.print(" %");

  if (temperatureC > 29) {
    digitalWrite(RED_LED_PIN, HIGH);
    digitalWrite(GREEN_LED_PIN, LOW);
    digitalWrite(BLUE_LED_PIN, LOW);
  }
  else if (temperatureC < 21) {
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(GREEN_LED_PIN, LOW);
    digitalWrite(BLUE_LED_PIN, HIGH);
  }
  else {
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(GREEN_LED_PIN, HIGH);
    digitalWrite(BLUE_LED_PIN, LOW);
  }

  int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  if (x == 200) {
    Serial.println("Update berhasil!.");
  }
  else {
    Serial.println("Ada Masalah Saat Update. HTTP Kode Error " + String(x));
  }

  delay(timerDelay);
}