Arduino Function: IPAddress

Description

This function defines an IP address. It can be used to declare local and remote addresses.

Syntax

IPAddress(address);

Parameters

address: a comma delimited list representing the address (4 bytes, ex. 192, 168, 1, 1)

Examples

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

// network configuration. dns server, gateway and subnet are optional.

 // the media access control (ethernet hardware) address for the shield:
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };  

// the dns server ip
IPAddress dnServer(192, 168, 0, 1);
// the router's gateway address:
IPAddress gateway(192, 168, 0, 1);
// the subnet:
IPAddress subnet(255, 255, 255, 0);

//the IP address is dependent on your network
IPAddress ip(192, 168, 0, 2);

void setup() {
  Serial.begin(9600);

  // initialize the ethernet device
  Ethernet.begin(mac, ip, dnServer, gateway, subnet);
  //print out the IP address
  Serial.print("IP = ");
  Serial.println(Ethernet.localIP());
}

void loop() {
}


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