Google Assistant Based Relay Controlling

/***************************************************
  Adafruit MQTT Library ESP8266 Example
 ****************************************************/
#include <ESP8266WiFi.h>
#include "Adafruit_MQTT.h"
#include "Adafruit_MQTT_Client.h"

#define rel1 0 // GPIO 0
#define rel2 1 // Tx Pin
#define rel3 2 // GPIO 2
#define rel4 3 // Rx Pin
/************************* WiFi Access Point *********************************/

#define WLAN_SSID       "YOUR-SSID"
#define WLAN_PASS       "YOUR-SSID-PASSWORD"

/************************* Adafruit.io Setup *********************************/

#define AIO_SERVER      "io.adafruit.com"
#define AIO_SERVERPORT  1883                   // use 8883 for SSL
#define AIO_USERNAME    "USER-NAME"   //Your Username
#define AIO_KEY         "API-KEY" // Your API Key
/************ Global State (you don't need to change this!) ******************/

// Create an ESP8266 WiFiClient class to connect to the MQTT server.
WiFiClient client;
// or... use WiFiFlientSecure for SSL
//WiFiClientSecure client;

// Setup the MQTT client class by passing in the WiFi client and MQTT server and login details.
Adafruit_MQTT_Client mqtt(&client, AIO_SERVER, AIO_SERVERPORT, AIO_USERNAME, AIO_KEY);

/****************************** Feeds ***************************************/

// Setup a feed called 'photocell' for publishing.
// Notice MQTT paths for AIO follow the form: <username>/feeds/<feedname>
//Adafruit_MQTT_Publish photocell = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/photocell");

// Setup a feed called 'onoff' for subscribing to changes.
Adafruit_MQTT_Subscribe onoff1 = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/relay1");
Adafruit_MQTT_Subscribe onoff2 = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/relay2");
Adafruit_MQTT_Subscribe onoff3 = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/relay3");
Adafruit_MQTT_Subscribe onoff4 = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/relay4");
/*************************** Sketch Code ************************************/

// Bug workaround for Arduino 1.6.6, it seems to need a function declaration
// for some reason (only affects ESP8266, likely an arduino-builder bug).
void MQTT_connect();

void setup() {
  //Serial.begin(115200);
  delay(10);
  pinMode(rel1, OUTPUT);
  pinMode(rel2, OUTPUT);
  pinMode(rel3, OUTPUT);
  pinMode(rel4, OUTPUT);
  digitalWrite(rel1,HIGH);
  digitalWrite(rel2,HIGH);
  digitalWrite(rel3,HIGH);
  digitalWrite(rel4,HIGH);
  //Serial.println(F("Adafruit MQTT demo"));
  // Connect to WiFi access point.
 // Serial.println(); Serial.println();
 // Serial.print("Connecting to ");
 // Serial.println(WLAN_SSID);

  WiFi.begin(WLAN_SSID, WLAN_PASS);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
   // Serial.print(".");
  }
 // Serial.println();
 // Serial.println("WiFi connected");
 // Serial.println("IP address: "); Serial.println(WiFi.localIP());

  // Setup MQTT subscription for onoff feed.
  mqtt.subscribe(&onoff1);
  mqtt.subscribe(&onoff2);
  mqtt.subscribe(&onoff3);
  mqtt.subscribe(&onoff4);
}

uint32_t x=0;

void loop() {
  // Ensure the connection to the MQTT server is alive (this will make the first
  // connection and automatically reconnect when disconnected).  See the MQTT_connect
  // function definition further below.
  MQTT_connect();

  // this is our 'wait for incoming subscription packets' busy subloop
  // try to spend your time here

  Adafruit_MQTT_Subscribe *subscription;
  while ((subscription = mqtt.readSubscription(5000))) {
         // to test the tx line data
    if (subscription == &onoff1){
     // Serial.print(F("Got: "));
     // Serial.println((char *)onoff1.lastread);
      uint16_t state1 = atoi((char *)onoff1.lastread);
     // Serial.println(state1);
      digitalWrite(rel1,state1);
    }
   if (subscription == &onoff2){
     // Serial.print(F("Got: "));
     // Serial.println((char *)onoff2.lastread);
      uint16_t state2 = atoi((char *)onoff2.lastread);
      //Serial.println(state2);
      digitalWrite(rel2,state2);
    }
    if (subscription == &onoff3){
      //Serial.print(F("Got: "));
      //Serial.println((char *)onoff3.lastread);
      uint16_t state3 = atoi((char *)onoff3.lastread);
     // Serial.println(state3);
      digitalWrite(rel3,state3);
    }
    if (subscription == &onoff4){
     // Serial.print(F("Got: "));
     // Serial.println((char *)onoff4.lastread);
      uint16_t state4 = atoi((char *)onoff4.lastread);
     // Serial.println(state4);
      digitalWrite(rel4,state4);
    }
  }

  // ping the server to keep the mqtt connection alive
  // NOT required if you are publishing once every KEEPALIVE seconds
  /*
  if(! mqtt.ping()) {
    mqtt.disconnect();
  }
  */
}

// Function to connect and reconnect as necessary to the MQTT server.
// Should be called in the loop function and it will take care if connecting.
void MQTT_connect() {
  int8_t ret;
  // Stop if already connected.
  if (mqtt.connected()) {
    return;
  }
 // Serial.print("Connecting to MQTT... ");
  uint8_t retries = 3;
  while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
      // Serial.println(mqtt.connectErrorString(ret));
      // Serial.println("Retrying MQTT connection in 5 seconds...");
       mqtt.disconnect();
       delay(5000);  // wait 5 seconds
       retries--;
       if (retries == 0) {
         // basically die and wait for WDT to reset me
         while (1);
       }
  }
 // Serial.println("MQTT Connected!");
}