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

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "mqtt.rexlab.ufsc.br";

WiFiClient espClient;
PubSubClient client(espClient);
long lastPublish = 0;

void setup() {
  Serial.begin(115200);
  Serial.print("Conectando ao Wi-Fi");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
  Serial.println("\nConectado!");


  client.setServer(mqtt_server, 1883);

  while (!client.connected()) {
    if (client.connect("ESP32Client")) {
      Serial.println("Conectado ao broker MQTT!");
    } else {
      Serial.print("Falha na conexão. Código de erro: ");
      delay(2000);
    }
  }
}

void loop() {

  if (millis() - lastPublish > 500) {
    String message = String(random(200));
    client.publish("Evandro/dashboard/random", message.c_str());
    Serial.println("Numero publicado: " + message);
    lastPublish = millis();
  }

  client.loop();
}