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

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

// MQTT Broker
const char *mqtt_host = "broker.emqx.io";
const char *topic_pub = "ivansahaja";
const int mqtt_port = 1883;

String client_id = "mqttx_06c5cd0d"; 

WiFiClient espClient;
PubSubClient client(espClient);
int waktu_sebelum, waktu_interval = 1*1000;

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

    WiFi.begin(ssid, pass);
    while (WiFi.status() != WL_CONNECTED) {
        delay(500);
        Serial.println("Menghubungkan ke WiFi...");
    }
    Serial.print("Terhubung ke WiFi");

    // Menghubungkan ke mqtt broker
    client.setServer(mqtt_host, mqtt_port);
    while (!client.connected()) {
        if (client.connect(client_id.c_str())) {
            Serial.println("Terhubung ke mqtt broker");
        } else {
            Serial.print("Gagal Terhubung ");
            Serial.print(client.state());
            delay(2000);
        }
    }
    // untuk mengirim data bisa menggunakan perintah variable.publish()
    // publish and subscribe (send data sekali saja)
    client.publish(topic_pub, "Hi Ivan");
    waktu_sebelum = millis();
}

// jika ingin mengirimkan pesan secara berulang
void loop() {
 client.loop();
 if(millis() - waktu_sebelum >= waktu_interval) {
    client.publish(topic_pub, "hi Ivan");
    Serial.println("hi Ivan");
    waktu_sebelum = millis();
 }
  client.publish(topic_pub, "Hi Ivan");
  waktu_sebelum = millis();
}