IPAddress()

Defines an IP address. It can be used to declare both local and remote addresses.

IPAddress(address);

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

None

#include <Ethernet.h>
 
// network configuration.  gateway and subnet are optional.
 
// the media access control (ethernet hardware) address for the shield:
byte mac[] = { 
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };  
// the router's gateway address:
byte gateway[] = { 
  10, 0, 0, 1 };
// the subnet:
byte subnet[] = { 
  255, 255, 0, 0 };
 
EthernetServer server = EthernetServer(23);
 
//the IP address is dependent on your network
IPAddress ip(192,168,1,1);
 
void setup()
{
  // initialize the ethernet device
  Ethernet.begin(mac, ip, gateway, subnet);
 
  // start listening for clients
  server.begin();
}
 
void loop()
{
  //print out the IP address
  Serial.println(myIPaddress);
}

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