Arduino Function: GSMclient.connected

Description

This method returns whether or not the client is connected. A client is considered connected if the connection has been closed but there is still unread data.

Syntax

client.connected()

Returns

 boolean - Returns true if the client is connected, false if not.

Examples

/*
Web client

This sketch connects to a website through a GSM shield. Specifically,
this example downloads the URL "http://arduino.org/" and prints it
to the Serial monitor.

Circuit:
* GSM shield attached to an Arduino
* SIM card with a data plan
*/


// libraries
#include <GSM.h>

// PIN Number
#define PINNUMBER ""

// APN data
#define GPRS_APN "GPRS_APN" // replace your GPRS APN
#define GPRS_LOGIN "login" // replace with your GPRS login
#define GPRS_PASSWORD "password" // replace with your GPRS password

// initialize the library instance
GSMClient client;
GPRS gprs;
GSM gsmAccess;

// URL, path & port (for example: arduino.org)
char server[] = "arduino.org";
char path[] = "/";
int port = 80; // port 80 is the default for HTTP

void setup()
{
// initialize serial communications
Serial.begin(9600);
Serial.println("Starting Arduino web client.");
// connection state
boolean notConnected = true;

// After starting the modem with GSM.begin()
// attach the shield to the GPRS network with the APN, login and password
while(notConnected)
{
if((gsmAccess.begin(PINNUMBER)==GSM_READY) &
(gprs.attachGPRS(GPRS_APN, GPRS_LOGIN, GPRS_PASSWORD)==GPRS_READY))
notConnected = false;
else
{
Serial.println("Not connected");
delay(1000);
}
}

Serial.println("connecting...");

// if you get a connection, report back via serial:
if (client.connect(server, port))
{
Serial.println("connected");
// Make a HTTP request:
client.print("GET ");
client.print(path);
client.println(" HTTP/1.0");
client.println();
}
else
{
// if you didn't get a connection to the server:
Serial.println("connection failed");
}
}

void loop()
{
// if there are incoming bytes available
// from the server, read them and print them:
if (client.available())
{
char c = client.read();
Serial.print(c);
}

// if the server's disconnected, stop the client:
if (!client.available() && !client.connected())
{
Serial.println();
Serial.println("disconnecting.");
client.stop();

// do nothing forevermore:
for(;;)
;
}
}


Based on the reference originally written by Arduino Community,  wiring.org.co and  arduino.cc