#include <PubSubClient.h>
#include <ESP8266WiFi.h>

const char *ssid =  "ssid";
const char *pass =  "password";

const char* mqtt_hostname = "hostname";
const char* mqtt_username = "username";
const char* mqtt_password = "password";
const char* mqtt_topic = "topic";

String clientName;
int teller, time_1;

WiFiClient wifiClient;
PubSubClient client(wifiClient);

bool connected = false;

void setup() {
  Serial.begin(115200);
 if (WiFi.status() != WL_CONNECTED) {
    Serial.print("Connecting to ");
    Serial.print(ssid);
    Serial.println("");
    WiFi.begin(ssid, pass);
    while (WiFi.status() != WL_CONNECTED) {
      delay(500);
      Serial.print(".");
    };
    Serial.println("WiFi connected");
  }

  // IPAddress serverIp = IPAddress(192,168,1,1);
  client.setServer(hostname, 1883);
  if (!client.connected()) {
    String clientId = "ESP8266Client-";
    clientId += String(random(0xffff), HEX);
    if (client.connect(clientId, mqtt_username, mqtt_password)) {
      connected = true;
      Serial.println("Done");
    }
  }
}

void loop() {
  if(connected) {
    teller++;
    time_1 = millis();
    if (client.publish(topic, ""+teller)) {
      Serial.println((millis() - time_1));
    } else {
      Serial.println("failed");
    }
  }
}