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

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

const char* mqtt_server = "broker.emqx.io";
const char* topic = "ambaNitro/arfin_desca_alzachri/LDR_sensor";

WiFiClient espClient;
PubSubClient client(espClient);

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

void reconnect() {
  while (!client.connected()) {
    Serial.print("Menghubungkan ke MQTT...");
    if (client.connect("ESP32Client")) {
      Serial.println("terhubung!");
    } else {
      Serial.print("Gagal, rc=");
      Serial.print(client.state());
      delay(2000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
}

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

  String message = "Ini adalah pesan sederhana dari ESP32";
  client.publish(topic, message.c_str());
  Serial.println("Pesan terkirim: " + message);

  delay(2000); // kirim setiap 2 detik
}