#include <WiFi.h>
#include <MQTT.h>
WiFiClient net;
MQTTClient client;
const char ssid[] = "Wokwi-GUEST";
const char pass[] = "";
const int pinLED = 4;
void setup() {
 Serial.begin(9600);
 pinMode(pinLED, OUTPUT);
 WiFi.begin(ssid, pass);
 client.begin("broker.hivemq.com", net);
 client.onMessage(subscribe);
  connect();
}
void loop() {
 client.loop();
 if(!client.connected()){
 connect();
 }
 delay(10);
}
void subscribe(String &topic, String &data){
 Serial.print("Topic: ");
 Serial.println(topic);
 Serial.print("Data: ");
 Serial.println(data);
 if(topic == "PraktikumIoT/p9"){
 if(data == "NYALA"){
 digitalWrite(pinLED, HIGH);
 }else if(data == "MATI"){
 digitalWrite(pinLED, LOW);
 }
 }
}
void connect(){
 Serial.print("\nMenghubungkan ke WiFi");
 while (WiFi.status() != WL_CONNECTED) {
 Serial.print(".");
 delay(500);
 }
 Serial.println("\nBerhasil terhubung ke WiFi");

while(!client.connect("clientId-2nIzQA1Gox")
){
 delay(50000);
 }
 Serial.print("MQTT Connect");
 //Memanggil Variabel + melakukan Fungsi Subscribe + argumen (Topik, QoS) setelah terhubung ke broker
 client.subscribe("PraktikumIoT/p9", 0);
}