#include "DHTesp.h"
#include <PubSubClient.h>
#include <WiFi.h>
//#include <LiquidCrystal_I2C.h>
//LiquidCrystal_I2C lcd(0x27, 16, 2);
DHTesp dhtSensor; 
int DHT_PIN = 25;

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

   const char *mqtt_host = "broker.emqx.io";
   const char *topic_temp = "ztemp";
   const char *topic_hum = "zhumid";
   const int port = 1883;

   String client_id = "mqttx_diajdiwqhdoiawjdiosajdilasdjqwoijoawid36128362613898";

   WiFiClient espClient;
   PubSubClient client(espClient);
   int waktu_sebelum, waktu_interval = 1*1000;
   
  void setup() {
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  Serial.begin(115200);

  WiFi.begin(ssid, pass);
  client.setServer(mqtt_host, port);


  while(WiFi.status() != WL_CONNECTED){
    Serial.println("Still trying to connect to wifi...");
    delay(500);
  }
  Serial.println("Connected");

   while (!client.connected()) {
    if (client.connect(client_id.c_str())) {
      Serial.println("connected to mqtt broker");
    } else {
      Serial.print("still not connected to mqtt broker");
      Serial.print(client.state());
      delay(2000);
    }
  }
  //lcd.init();
  //lcd.backlight();
}

void loop() {
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();//menyimpan data suhu & klmbp
  float temp = data.temperature;
  float hum = data.humidity;

  client.loop();
  if(millis() - waktu_sebelum >= waktu_interval){
  client.publish(topic_temp, String(temp).c_str());
  client.publish(topic_hum, String(hum).c_str());
  waktu_sebelum = millis();
  }


  Serial.println("Temp: " + String(temp, 2) + "°C");//display suhu
  Serial.println("Humidity: " + String(hum, 1) + "%");//display kelembapan
  Serial.println("---");

  /*lcd.setCursor(0,0);
  lcd.print("Temp: ");
  lcd.print(String(temp, 2));
  lcd.print("°C");

  
  lcd.setCursor(0,1);
  lcd.print("Humidity: ");
  lcd.print(String(hum, 2));
  lcd.print("%"); */
  delay(500); // this speeds up the simulation
}

/* 
angka yang dibelankang koma seperti String(data.temperature, 2) + "°C" ===>> ",2" ini 
menandakan kalau ada 2 angka dibelakang koma*/

//note = ada beberapa pin yang tidak berfungsi untyuk pin SDA dan SCL pada lcd.