// ------------------------------
//     Gilang Raka Ramadhan
// NIM 3.34.22.2.08 / Kelas IK2C
// ------------------------------

#include <DHTesp.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <PubSubClient.h>

#define DHT_PIN 15
DHTesp dhtSensor;
LiquidCrystal_I2C lcd(0x27, 20, 4);
WiFiClient espClient;
PubSubClient client(espClient);

const char* ssid = "Wokwi-GUEST";
const char* password = "";

const char* mqtt_server = "iotpintar.net";
const int mqtt_port = 1883;
const char* mqtt_user = "";
const char* mqtt_password = "";

float suhu;
float kelembapan;

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

  setup_wifi();
  client.setServer(mqtt_server, 1883);

  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  lcd.init();
  lcd.backlight();
}

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

  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  suhu = data.temperature;
  kelembapan = data.humidity;

  lcd.clear();
  lcd.setCursor(3,1);
  lcd.print("Suhu : ");
  lcd.print(suhu);
  lcd.println(" C");

  lcd.setCursor(0,2);
  lcd.print("Kelembapan : ");
  lcd.print(kelembapan);
  lcd.println(" %");

  // Send data to MQTT
  char* topik_suhu = "polines/ik/33422208/RT";
  client.publish(topik_suhu, String(suhu).c_str());

  char* topik_kelembapan = "polines/ik/33422208/RH";
  client.publish(topik_kelembapan, String(kelembapan).c_str());

  delay(2500);
}

void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

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

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

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.print("IP address : ");
  Serial.println(WiFi.localIP());
}

void reconnect() {
  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);;
    }
  }
}