//Nama : Satrio Dimas Galih P.
// kelas : IK-2A/ 3.34.22.0.20


#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <PubSubClient.h>

// Definisikan pin sensor DHT
#define DHTPIN 23
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

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

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

// Konfigurasi Server MQTT
const char* mqtt_server = "iotpintar.net";
const int mqtt_port = 1883;
const char* mqtt_user = "Rangga";
const char* mqtt_password = "";

// Objek klien WiFi dan MQTT
WiFiClient espClient;
PubSubClient client(espClient);

float hum;
float temp;

void setup_wifi() {
  delay(10);
  // Mulai dengan menghubungkan ke jaringan WiFi
  Serial.println();
  Serial.print("Menghubungkan ke ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  randomSeed(micros());

  Serial.println("");
  Serial.println("WiFi terhubung");
  Serial.println("Alamat IP: ");
  Serial.println(WiFi.localIP());
}

void setup() {
  Serial.begin(115200);
  delay(2000);

  setup_wifi();

  // Inisialisasi klien MQTT
  client.setServer(mqtt_server, mqtt_port);
  // Mengatur callback yang akan dipanggil ketika pesan masuk
  client.setCallback(callback);

  // Inisialisasi sensor DHT
  dht.begin();

  // Inisialisasi LCD
  lcd.init();
  lcd.backlight();
  lcd.setCursor(3, 0);
  lcd.print("Papan Informasi");
  lcd.setCursor(2, 1);
  lcd.print("Suhu & Kelembaban");
  lcd.setCursor(8, 2);
  lcd.print("oleh");
  lcd.setCursor(2, 3);
  lcd.print("Satrio Dimas");
  delay(3000);
  lcd.clear();
}

// Callback MQTT
void callback(char* topic, byte* payload, unsigned int length) {
  // Callback ini akan dipanggil ketika ada pesan masuk dari server MQTT
  // Anda dapat menambahkan logika yang sesuai di sini.
}

void reconnect() {
  // Loop sampai klien terhubung ke server MQTT
  while (!client.connected()) {
    Serial.print("Mencoba terhubung ke server MQTT...");
    if (client.connect("ESP32Client", mqtt_user, mqtt_password)) {
      Serial.println("Terhubung ke server MQTT");
    } else {
      Serial.print("Gagal, kode status = ");
      Serial.print(client.state());
      Serial.println(" Coba lagi dalam 5 detik");
      delay(5000);
    }
  }
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();

  hum = dht.readHumidity();
  temp = dht.readTemperature();

  if (isnan(hum) || isnan(temp)) {
    Serial.println("Gagal membaca data dari sensor DHT22");
    return;
  }
  lcd.init();
  lcd.backlight();
  lcd.setCursor(3, 0);
  lcd.print("Papan Informasi");
  lcd.setCursor(2, 1);
  lcd.print("Suhu & Kelembaban");
  lcd.setCursor(0, 2);
  lcd.print("Suhu       :");
  lcd.setCursor(13, 2);
  lcd.print(temp);
  lcd.setCursor(19, 2);
  lcd.print("C");

  lcd.setCursor(0, 3);
  lcd.print("Kelembaban :");
  lcd.setCursor(13, 3);
  lcd.print(hum);
  lcd.setCursor(19, 3);
  lcd.print("%");

  // Kirim data ke server MQTT
  String topic_humidity = "polines/Ik/33422020/RH";
  String topic_temperature = "polines/Ik/33422020/RT";
  client.publish(topic_humidity.c_str(), String(hum).c_str());
  client.publish(topic_temperature.c_str(), String(temp).c_str());

  delay(2000);
  lcd.clear();
}