remote

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

const char* ssid = "xxx";
const char* password =  "xxxxxxx";
const char* mqttServer = "192.168.1.xx";
const int mqttPort = 1883;

#define LED 5 // D1(gpio5)
#define BUTTON 4 //D2(gpio4)
//Let's say you have your push button on pin 4
int switchState = 0; // actual read value from pin4
int oldSwitchState = 0; // last read value from pin4
int lightsOn = 0; // is the switch on = 1 or off = 0

WiFiClient espClient;
PubSubClient client(espClient);

void setup() {

  Serial.begin(115200);
   WiFi.begin(ssid, password);
   while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.println("Connecting to WiFi..");
    Serial.print("Connected to ");
    Serial.print(ssid);
    Serial.println();
  }


  client.setServer(mqttServer, mqttPort);
 // client.setCallback(callback);

  while (!client.connected()) {
    Serial.println("Connecting to MQTT...");

    if (client.connect("ESP8266Client" )) {

      Serial.print("connected");

    } else {

      Serial.print("failed with state ");
      Serial.print(client.state());
      delay(2000);

    }
  }

  client.publish("home/office/sonoff1", "Remote");
  client.subscribe("home/office/sonoff1");


 pinMode(BUTTON, INPUT); // push button
 pinMode(LED, OUTPUT); // anything you want to control using a switch e.g. a Led
}
void loop ()
{
    switchState = digitalRead(BUTTON); // read the pushButton State
    if (switchState != oldSwitchState) // catch change
    {
        oldSwitchState = switchState;
        if (switchState == HIGH)
        {
            // toggle
            lightsOn = !lightsOn;
        }

        if(lightsOn)
        {
            digitalWrite(LED, HIGH); // set the LED on
            client.publish("home/office/sonoff1", "on");
        }
        else
        {
            digitalWrite(LED, LOW); // set the LED off
            client.publish("home/office/sonoff1", "off");
        }
    }

}