#include <WiFi.h>
#include <PubSubClient.h>
#include "DHT.h"

// Deklarasi pin untuk sensor DHT22
#define DHTPIN 2     
#define DHTTYPE DHT22   
DHT dht(DHTPIN, DHTTYPE);

// Ganti dengan broker MQTT
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "broker.emqx.io";

WiFiClient espClient;
PubSubClient client(espClient);

int led = 22;
char perintah;

void reconnect() {
  while (!client.connected()) {
    Serial.print("Menghubungkan ke MQTT...");
    if (client.connect("ESP32Client-komang12345!%%")) {
      Serial.println("terhubung!");
      client.subscribe("/kamar/lampu/");  
    } else {
      Serial.print("Gagal, rc=");
      Serial.print(client.state());
      Serial.println(" coba lagi dalam 5 detik");
      delay(5000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password, 6);
  Serial.print("Menghubungkan ke WiFi...");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println(" terhubung!");

  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);

  pinMode(led, OUTPUT);
  dht.begin();
}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Pesan diterima [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
  }
  Serial.println();
  
  if (length > 0) {
    perintah = (char)payload[0];  
    Serial.println(perintah);
  }
  
}

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

  if(perintah == '1')
  {
    digitalWrite(led, HIGH);
  }
  else if(perintah == '0')
  {
    digitalWrite(led, LOW);
  }
  
  // Start -- Membaca data sensor dan mem-publish data ke Broker IoT
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  String datasensor = String(temperature);
  client.publish("data/suhu/kamar", datasensor.c_str());

  datasensor = String(humidity);
  client.publish("data/kelembaban/kamar", datasensor.c_str());
  // End -- Membaca data sensor dan mem-publish data ke Broker IoT
  
}