Bdtjtk

I m trying to send the dht22 temperature and humidity data to cloud mqtt.
I m using ESP8266 as wifi module to send the data from the arduino uno to the server.
The libraries i m using are : wifiesp, Pubsubclient and dht
The problem i m facing is that the connection to the mqtt server gets failed and returns -2 on serial monitor, sometimes i face data packet send error(2) and socket error.
this is my first question on stackoverflow, so sorry for any error i made.

My code is:

#include "DHT.h"

#include <WiFiEspClient.h>

#include <WiFiEsp.h>

#include <WiFiEspUdp.h>

#include <PubSubClient.h>

#include "SoftwareSerial.h"



#define WIFI_AP "ssid"

#define WIFI_PASSWORD "password"



#define TOKEN "mqttusername"

#define PASS "mqttpassword"



// DHT

#define DHTPIN 5

#define DHTTYPE DHT22



char mqttServer = "m15.cloudmqtt.com";



// Initialize the Ethernet client object

WiFiEspClient espClient;



// Initialize DHT sensor.

DHT dht(DHTPIN, DHTTYPE);



PubSubClient client(espClient);



SoftwareSerial Serial1(10,11); // RX, TX



int status = WL_IDLE_STATUS;

unsigned long lastSend;



void setup() {

  // initialize serial for debugging

  Serial.begin(115200);



  dht.begin();

  InitWiFi();

  client.setServer( mqttServer, 17094 );

  lastSend = 0;

}



void loop() {

  //status = WiFi.status();



  if ( !client.connected() ) {

    reconnect();

  }



  if ( millis() - lastSend > 1000 ) { // Update and send only after 1 seconds

    getAndSendTemperatureAndHumidityData();

    lastSend = millis();

  }



  client.loop();

}



void getAndSendTemperatureAndHumidityData()

{

  Serial.println("Collecting temperature data.");



  // Reading temperature or humidity takes about 250 milliseconds!

  float h = dht.readHumidity();

  // Read temperature as Celsius (the default)

  float t = dht.readTemperature();



  // Check if any reads failed and exit early (to try again).

  if (isnan(h) || isnan(t)) {

    Serial.println("Failed to read from DHT sensor!");

    return;

  }



  Serial.print("Humidity: ");

  Serial.print(h);

  Serial.print(" %t");

  Serial.print("Temperature: ");

  Serial.print(t);

  Serial.print(" *C ");



  String temperature = String(t);

  String humidity = String(h);





  // Just debug messages

  Serial.print( "Sending temperature and humidity : [" );

  Serial.print( temperature ); Serial.print( "," );

  Serial.print( humidity );

  Serial.print( "]   -> " );



  // Prepare a JSON payload string

  String payload = "{";

  payload += ""temperature":"; payload += temperature; payload += ",";

  payload += ""humidity":"; payload += humidity;

  payload += "}";



  // Send payload

  char attributes[100];

  payload.toCharArray( attributes, 100 );

  client.publish( "esp8266/dht22", attributes );

  Serial.println( attributes );

}



void InitWiFi()

{

   // initialize serial for ESP module

  Serial1.begin(115200);

  // initialize ESP module

  WiFi.init(&Serial1);



  // check for the presence of the shield

  if (WiFi.status() == WL_NO_SHIELD) {

    Serial.println("WiFi shield not present");

    // don't continue

    while (false);

  }



  // attempt to connect to WiFi network

  while ( status != WL_CONNECTED) {

    Serial.print("Attempting to connect to WPA SSID: ");

    // print the SSID of the network you're attached to

   //Serial.print("SSID: ");

   Serial.println(WiFi.SSID());

    // Connect to WPA/WPA2 network

    status = WiFi.begin(WIFI_AP, WIFI_PASSWORD);

  }

}



void reconnect() {

  // Loop until we're reconnected

  while (!client.connected()) {

    Serial.print("Connecting to CLOUD MQTT ...");

    // Attempt to connect (clientId, username, password)

    if ( client.connect("Arduino Uno Device", TOKEN, PASS) ) {

      Serial.println( "[DONE]" );

    } else {

      Serial.print( "[FAILED] [ rc = " );

      Serial.print( client.state() );

      Serial.println( " : retrying in 5 seconds]" );

      // Wait 5 seconds before retrying

      delay( 5000 );

    }

  }

}

The error I m getting are:serial monitor on arduino ide

The cloud mqtt log says

2019-01-04 10:51:28: Socket error on client Arduino Uno Device, disconnecting.

2019-01-04 10:51:48: New connection from 103.215.241.176 on port 17094.

2019-01-04 10:51:48: New client connected from 103.215.241.176 as Arduino Uno Device (c1, k15, u'ihiiwona').

2019-01-04 10:51:48: No will message specified.

2019-01-04 10:51:48: Sending CONNACK to Arduino Uno Device (0, 0)

2019-01-04 10:52:11: Client Arduino Uno Device has exceeded timeout, disconnecting.

2019-01-04 10:52:11: Socket error on client Arduino Uno Device, disconnecting.

2019-01-04 10:52:14: New connection from 103.215.241.176 on port 17094.

2019-01-04 10:52:14: New client connected from 103.215.241.176 as Arduino Uno Device (c1, k15, u'ihiiwona').

2019-01-04 10:52:14: No will message specified.

2019-01-04 10:52:14: Sending CONNACK to Arduino Uno Device (0, 0)

2019-01-04 10:52:26: Received PINGREQ from MQTT_FX_Client

2019-01-04 10:52:26: Sending PINGRESP to MQTT_FX_Client

2019-01-04 10:52:36: Client Arduino Uno Device has exceeded timeout, disconnecting.

2019-01-04 10:52:36: Socket error on client Arduino Uno Device, disconnecting.

2019-01-04 10:52:40: New connection from 103.215.241.176 on port 17094.

2019-01-04 10:53:26: Received PINGREQ from MQTT_FX_Client

2019-01-04 10:53:26: Sending PINGRESP to MQTT_FX_Client

2019-01-04 10:54:11: Client <unknown> has exceeded timeout, disconnecting.

2019-01-04 10:54:11: Socket error on client <unknown>, disconnecting.

Please someone help and tell me what i m doing wrong.