#include <ESP8266WiFi.h>
void connection() ;

#include <PubSubClient.h>
const char* mqtt_server = "chrome";
const char* input = "inTopic" ;
const char* output = "outTopic" ;

WiFiClient espClient; // WiFi connection obj
PubSubClient client(espClient); // MQTT client obj

const byte ledPin = 2; // GPIO2 on LoLin Nodemcu

void setup() {
  Serial.begin(115200);
  delay(10);

  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, HIGH); // OnBoard LED is inverted

  connection();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback); //message callback function
  // called when a message arrives for a subscription created by this client.
  
}

void loop() {
  
if (!client.connected()) { // Keep MQTT connection on
    reconnect();
  }
client.loop();

client.publish(output, "Test Message");
delay(500);
}

void callback(char* topic, byte* payload, unsigned int length) {


}