Arduino Function: client.connect

Description

Connects to a specified IP address and port. The return value indicates success or failure. Also supports DNS lookups when using a domain name.

Syntax

client.connect()
client.connect(ip, port)
client.connect(URL, port)

Parameters

ip: the IP address that the client will connect to (array of 4 bytes) *url: the domain name the client will connect to (string, ex.:"arduino.org") *port: the port that the client will connect to (int)

Returns

 Returns an int (1,-1,-2,-3,-4) that indicates the connection status: * 1 - SUCCESS *-1 - TIMED_OUT *-2 - INVALID_SERVER *-3 - TRUNCATED *-4 – INVALID_RESPONSE

Examples

#include  //If you are using Ethernet Shield 2, use instead 
#include 

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
byte ip[] = { 10, 0, 0, 177 };
byte server[] = { 64, 233, 187, 99 }; // Google

EthernetClient client;

void setup()
{
  Ethernet.begin(mac, ip);
  Serial.begin(9600);

  delay(1000);

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

  if (client.connect(server, 80)) {
    Serial.println("connected");
    client.println("GET /search?q=arduino HTTP/1.0");
    client.println();
  } else {
    Serial.println("connection failed");
  }
}

void loop()
{
  if (client.available()) {
    char c = client.read();
    Serial.print(c);
  }

  if (!client.connected()) {
    Serial.println();
    Serial.println("disconnecting.");
    client.stop();
  }
}


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