#include <SPI.h>
    #include <Ethernet.h>
    #include <EthernetUdp.h>

    // Enter a MAC address and IP address for your controller below.
    // The IP address will be dependent on your local network:
    byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
    IPAddress ip(192, 168, 1, 177);

    unsigned int localPort = 8888;      // local port to listen on

    // An EthernetUDP instance to let us send and receive packets over UDP
    EthernetUDP Udp;

    void setup() {
      // start the Ethernet and UDP:
      Ethernet.begin(mac,ip);
      Udp.begin(localPort);

    }

    void loop() {

      Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
      Udp.write("hello");
      Udp.endPacket();
    }