Unable to connect mqtt servere in adafruit.io

[iampaulidrobo]

Initially it was showing server request and unable to connect so I have uncommented the debug comment in the adfruit library.But now I am getting this

# CODE

`/***************************************************
Adafruit MQTT Library ESP8266 Example

Must use ESP8266 Arduino from:
https://github.com/esp8266/Arduino

Works great with Adafruit's Huzzah ESP board & Feather
----> https://www.adafruit.com/product/2471
----> https://www.adafruit.com/products/2821

Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!

Written by Tony DiCola for Adafruit Industries.
MIT license, all text above must be included in any redistribution
#define DEBUG_PRINT 0

void setup() {
if (DEBUG_PRINT) {
Serial.begin(115200);
}
}
****************************************************/
#include <ESP8266WiFi.h>
#include "Adafruit_MQTT.h"
#include "Adafruit_MQTT_Client.h"

/************************* WiFi Access Point *********************************/

#define WLAN_SSID "Labhansh Photography"
#define WLAN_PASS "thakkar69"

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

#define AIO_SERVER "io.adafruit.com"
#define AIO_SERVERPORT 1883 // use 8883 for SSL
#define AIO_USERNAME "Drboy"
#define AIO_KEY

"71dafd72b0f64863d2c02ba3f6d9c"

/************ 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: /feeds/
Adafruit_MQTT_Publish photocell = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/photocell");

// Setup a feed called 'onoff' for subscribing to changes.
Adafruit_MQTT_Subscribe onoffbutton = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/onoff");

/*************************** 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);

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(&onoffbutton);
}

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))) {
if (subscription == &onoffbutton) {
Serial.print(F("Got: "));
Serial.println((char *)onoffbutton.lastread);
}
}

// Now we can publish stuff!
Serial.print(F("\nSending photocell val "));
Serial.print(x);
Serial.print("...");
if (! photocell.publish(x++)) {
Serial.println(F("Failed"));
} else {
Serial.println(F("OK!"));
}

// 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!");
}

SERIAL MONITOR OUTPUT

Connecting to Labhansh Photography
...
WiFi connected
IP address:
192.168.31.190
Added sub 0
Connecting to MQTT... Connecting to: io.adafruit.com
Connect result: 0
Connection failed
Retrying MQTT connection in 5 seconds...
MQTT disconnect packet:
⸮ [0xE0], [0x00],
Connection failed!
Unable to send disconnect packet
Connecting to: io.adafruit.com
Connect result: 0
Connection failed
Retrying MQTT connection in 5 seconds...
MQTT disconnect packet:
⸮ [0xE0], [0x00],
Connection failed!
Unable to send disconnect packet
Connecting to: io.adafruit.com
Connect result: 0
Connection failed
Retrying MQTT connection in 5 seconds...
MQTT disconnect packet:
⸮ [0xE0], [0x00],
Connection failed!
Unable to send disconnect packet

Soft WDT reset

ctx: cont
sp: 3ffef600 end: 3ffef7f0 offset: 01b0

stack>>>
3ffef7b0: 00000001 3ffee5b8 3ffee794 40201e1e
3ffef7c0: 3fffdad0 00000000 3ffee7b8 40201e74
3ffef7d0: 3fffdad0 00000000 3ffee7b8 40203d54
3ffef7e0: feefeffe feefeffe 3ffee7d0 40100718
<<<stack<<<

ets Jan 8 2013,rst cause:2, boot mode:(3,6)

load 0x4010f000, len 1384, room 16
tail 8
chksum 0x2d
csum 0x2d
v3ffe864c
~ld
⸮Adafruit MQTT demo

## **ESP exception decoder output for stacks**

Decoding 4 results
0x40201e1e: MQTT_connect() at C:\Users\piyus\OneDrive\Documents\Arduino\MCU_4/MCU_4.ino line 150
0x40201e74: loop at C:\Users\piyus\OneDrive\Documents\Arduino\MCU_4/MCU_4.ino line 105
0x40203d54: loop_wrapper at C:\Users\piyus\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\cores\esp8266/core_esp8266_main.cpp line 56
0x40100718: cont_norm at C:\Users\piyus\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\cores\esp8266/cont.S line 109

`