Display DHCP information on Arduino

Projects Networking, Protocols, and Devices
3 
#include <SPI.h>
#include <Ethernet.h>
#include <Dns.h>

// Enter a MAC address for your controller below.
// Newer Ethernet shields have a MAC address printed on a sticker on the shield
byte mac[] = {  
  0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02 };

void setup() {
 // Open serial communications and wait for port to open:
  Serial.begin(115200);
  // this check is only needed on the Leonardo:
   while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }

  pinMode(4,OUTPUT);
  digitalWrite(4,HIGH);
  
  // start the Ethernet connection:
  if (Ethernet.begin(mac) == 0) {
    Serial.println("Failed to configure Ethernet using DHCP");
    // no point in carrying on, so do nothing forevermore:
    for(;;)
      ;
  }
  // print your local IP address:
  Serial.print("IP: ");
  Serial.println(Ethernet.localIP());
  Serial.print("Gateway: ");
  Serial.println(Ethernet.gatewayIP());
  Serial.print("Subnet: ");
  Serial.println(Ethernet.subnetMask());
  Serial.print("DNS: ");
  Serial.println(Ethernet.dnsServerIP());
  Serial.println();
}

void loop() {
}