[SOLVED] Arduino CC3000 websocket client

[tahertinu]

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I am working for arduino websocket client with CC3000 wifi board from adafruit. I have usde this websocket example as a reference and modified to work with cc3000 wifi board. I am not able to connect to echo.websocket.org. My code shows client is not connected and unavailable to communicate after sending the upgrade headers. Here is the serial monitor response for the code:

echo.websocket.org -> Errno: 1
174.129.224.73-------------------------------------
Client connected
Sending websocket upgrade headers
Analyzing response headers
client not connected
client not available

here is the Arduino sckech:

#include <Adafruit_CC3000.h>
#include <ccspi.h>
#include <SPI.h>
#include <string.h>
#include <WebSocketClient.h>
#include "utility/debug.h"

// These are the interrupt and control pins
#define ADAFRUIT_CC3000_IRQ   3  // MUST be an interrupt pin!
// These can be any two pins
#define ADAFRUIT_CC3000_VBAT  5
#define ADAFRUIT_CC3000_CS    10
// Use hardware SPI for the remaining pins
// On an UNO, SCK = 13, MISO = 12, and MOSI = 11
Adafruit_CC3000 cc3000 = Adafruit_CC3000(ADAFRUIT_CC3000_CS, ADAFRUIT_CC3000_IRQ, ADAFRUIT_CC3000_VBAT,
SPI_CLOCK_DIVIDER); // you can change this clock speed

#define WLAN_SSID       "UNSTOPPABLE"           // cannot be longer than 32 characters!
#define WLAN_PASS       "8878333344"
// Security can be WLAN_SEC_UNSEC, WLAN_SEC_WEP, WLAN_SEC_WPA or WLAN_SEC_WPA2
#define WLAN_SECURITY   WLAN_SEC_WPA2

#define IDLE_TIMEOUT_MS  3000      // Amount of time to wait (in milliseconds) with no data 
// received before closing the connection.  If you know the server
// you're accessing is quick to respond, you can reduce this value.

// What page to grab!
#define WEBSITE      "echo.websocket.org"
//#define WEBPAGE      "/testwifi/index.html"

// Here we define a maximum framelength to 64 bytes. Default is 256.
#define MAX_FRAME_LENGTH 64

// Define how many callback functions you have. Default is 1.
#define CALLBACK_FUNCTIONS 1



Adafruit_CC3000_Client www;
WebSocketClient webSocketClient;
/**************************************************************************/
/*!
 @brief  Sets up the HW and the CC3000 module (called automatically
 on startup)
 */
/**************************************************************************/

uint32_t ip;

void setup(void)
{
  Serial.begin(115200);
  Serial.println(F("Hello, CC3000!\n")); 

  Serial.print("Free RAM: "); 
  Serial.println(getFreeRam(), DEC);

  /* Initialise the module */
  Serial.println(F("\nInitializing..."));
  if (!cc3000.begin())
  {
    Serial.println(F("Couldn't begin()! Check your wiring?"));
    while(1);
  }

  // Optional SSID scan
  // listSSIDResults();

  Serial.print(F("\nAttempting to connect to ")); 
  Serial.println(WLAN_SSID);
  if (!cc3000.connectToAP(WLAN_SSID, WLAN_PASS, WLAN_SECURITY)) {
    Serial.println(F("Failed!"));
    while(1);
  }

  Serial.println(F("Connected!"));

  /* Wait for DHCP to complete */
  Serial.println(F("Request DHCP"));
  while (!cc3000.checkDHCP())
  {
    delay(100); // ToDo: Insert a DHCP timeout!
  }  

  /* Display the IP address DNS, Gateway, etc. */
  while (! displayConnectionDetails()) {
    delay(1000);
  }

  ip = 0;
  // Try looking up the website's IP address
  Serial.print(WEBSITE); 
  Serial.print(F(" -> "));
  while (ip == 0) {
    if (! cc3000.getHostByName(WEBSITE, &ip)) {
      Serial.println(F("Couldn't resolve!"));
    }
    delay(500);
  }

  cc3000.printIPdotsRev(ip);

  // Optional: Do a ping test on the website
  /*
  Serial.print(F("\n\rPinging ")); cc3000.printIPdotsRev(ip); Serial.print("...");  
   replies = cc3000.ping(ip, 5);
   Serial.print(replies); Serial.println(F(" replies"));
   */

  /* Try connecting to the website.
   Note: HTTP/1.1 protocol is used to keep the server from closing the connection before all data is read.
   */
  www = cc3000.connectTCP(ip, 80);
  if (www.connected()) {
    /*    www.fastrprint(F("GET "));
     www.fastrprint(WEBPAGE);
     www.fastrprint(F(" HTTP/1.1\r\n"));
     www.fastrprint(F("Host: ")); www.fastrprint(WEBSITE); www.fastrprint(F("\r\n"));
     www.fastrprint(F("\r\n"));
     www.println();*/
  } 
  else {
    Serial.println(F("Connection failed"));    
    return;
  }

  Serial.println(F("-------------------------------------"));

  /* Read data until either the connection is closed, or the idle timeout is reached. */
  /*  unsigned long lastRead = millis();
   while (www.connected() && (millis() - lastRead < IDLE_TIMEOUT_MS)) {
   while (www.available()) {
   char c = www.read();
   Serial.print(c);
   lastRead = millis();
   }
   }
   www.close();
   Serial.println(F("-------------------------------------"));*/

  /* You need to make sure to clean up after yourself or the CC3000 can freak out */
  /* the next time your try to connect ... */
  /*  Serial.println(F("\n\nDisconnecting"));
   cc3000.disconnect();*/
  // Handshake with the server
  webSocketClient.path = "/";
  webSocketClient.host = WEBSITE;

  if (webSocketClient.handshake(www)) {
    Serial.println("Handshake successful");
  } 
  else {
    Serial.println("Handshake failed.");
    while(1) {
      // Hang on failure
    }  
  }  
}

void loop(void)
{
  String data; 
  if (www.connected()) {

    /*   data = webSocketClient.getData();

     if (data.length() > 0) {
     Serial.print("Received data: ");
     Serial.println(data);
     }*/

    // capture the value of analog 1, send it along
    pinMode(1, INPUT);
    data = String(analogRead(1));

    webSocketClient.sendData(data);

  } 
  else {

    Serial.println("Client disconnected.");
    while (1) {
      // Hang on disconnect.
    }
  }

  // wait to fully let the client disconnect
  delay(3000);
}

If anybody can guide me where I am wrong then it would be great help.I have taken reference code from brandenhall/Arduino-Websocket

 

[tahertinu]

I am able to connect to Websocket server echo.websocket.org successfully. I am sending and receiving the string data to the server successfully.
Here My client get disconnected after sending and receiving string two times.

Here is a loop which check continuously whether client is connected or not

 if (www.connected()) {
        // capture the value of analog 1, send it along
        pinMode(1, INPUT);
        data = String(analogRead(1));
    
        webSocketClient.sendData(data);
        webSocketClient.getData(data); 
 
         if (data.length() > 0) {
         Serial.print("Received data: ");
         Serial.println(data);

         }
      } 
      else {
        Serial.println("Client disconnected.");
        while (1) {
          // Hang on disconnect.
        }
      }

Here is the code of Adafruit library which check the connection

uint8_t Adafruit_CC3000_Client::connected(void) { 
      if (_socket < 0) return false;
    
      if (! available() && closed_sockets[_socket] == true) {
        //if (CC3KPrinter != 0) CC3KPrinter->println("No more data, and closed!");
    	
        closesocket(_socket);
        closed_sockets[_socket] = false;
        _socket = -1;
        return false;
      }

Please guide me anybody here. Here is a repository for this code

 

[tahertinu]

Code worked perfactly. Has made connection with echo.websocket.org and get echo whatever sent to server.