MQTT

WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
  Serial.begin(9600);
  IPAddress ip(192,168,1,35);
  IPAddress gateway(192,168,1,1);
  IPAddress subnet(255,255,255,0);
  WiFi.hostname("ESP8266 ESP-01");
  WiFi.config(ip,gateway,subnet);
  WiFi.begin(ssid, password);

  Serial.println("connected");

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.println("Přiojuji se WiFi");
   }
   Serial.println("Jsme připojení k WiFi");

   client.setServer(mqttServer, mqttPort);

   while (!client.connected()) {
    Serial.println("připojuji se k MQTT");
    //***************************************
    if (client.connect("ESP", mqttUser, mqttPassword )) {
        Serial.println("Jsme připojeni k MQTT");
       }
       else
       {
        Serial.print("Nepodařilo se připojit k MQTT ");
        Serial.print(client.state());
        delay(2000);
       }
    }
}
void loop() {
    client.loop();
    if (millis() >= cas + 60000) {
        odesli();
        cas = millis();
        Serial.println(cas);
    }
}
void odesli()
{
  if (client.publish("data", "Test MQTT 1"))
    {
     Serial.println("Data Test MQTT 1");
    }
    else {
        Serial.println("MQTT Broker neni připojen, připojuji");
        client.connect("ESP", mqttUser, mqttPassword );
        delay(10);
        client.publish("data", "Test MQTT 1");
    }

  }