Esp8266 no serial prints / connecting to WiFi and MQTT Broker problem

Projects Programming
7

Ok thank you. I got feedback now and know what is wrong. I connected to my wifi but I can't connect to my HiveMQ free cloud mqtt broker:

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In my HiveMQ console I got port 8883 (TLS ): image
and the url which I put on my node-red node mqtt-broker-node in server attribute and the port 8883 and clicked "Use TLS" and in the Secruity label I enter username and password and I put in on my esp's code.

const char * mqtt_server = "7e2xxxxxxxxxxxxx71a.s1.eu.hivemq.cloud"; // Local IP address of Raspberry Pi or cloud mqtt broker

const char * username = "xxxxxxxxxx";
const char * pass = "xxxxxxxxxxxxxxx";

// Connecting to MQTT broker

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "ESP8266Client-";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    if (client.connect(clientId.c_str(), username, pass)) {
      Serial.println("connected");
      // Once connected, publish an announcement...
      client.publish("outTopic", "hello world");
      // ... and resubscribe
      client.subscribe(sub1);
      client.subscribe(sub2);
      client.subscribe(sub3);
      client.subscribe(sub4);
      client.subscribe(sub5);
      client.subscribe(sub6);
      client.subscribe(sub7);
      client.subscribe(sub8);
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

and in void setup i got:

void setup() {
  setup_wifi();
  client.setServer(mqtt_server, 8883);
  client.setCallback(callback);
}

BTW: Anyway I got to ask. If I got e.g. GPIO01 (TX) I got defined it like: int led = 1 because it is GPIO01? So I got look at GPIO[NUMBER] not on the pcb D[NUMBER] e.g D1,D3,D7?
I have to defined it in Arduino IDE like this:
int LED = 1
or GPIO4
int LED2 = 4 // it is D2
What value for GPIO4? 2 or 4? beacuase it's digital pin 2 (D2) but it has GPIO4. ;/