Komunikasi UDP Arduino

hmmm.....seharian dibuat pusing dengan UDP.....ternyata Mudah banget....
jadinya spt ni komunikasinya:

KODE SENT DATA

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


//#define UDP_TX_PACKET_MAX_SIZE 0
// 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, 3,101);

unsigned int localPort = 8888;      // local port to listen on
//char packetBuffer[UDP_TX_PACKET_MAX_SIZE]; //buffer to hold incoming packet,

// An EthernetUDP instance to let us send and receive packets over UDP
EthernetUDP Udp;
char G11='1';
char G10='2';
void setup() {
  // start the Ethernet and UDP:
  Ethernet.begin(mac,ip);
  Udp.begin(localPort);
   Serial.begin(9600);
}

void loop() {
 
     long R=random(1,12); 
  if(R>11){G11='A';}
  else if(R>9){G11='B';}
  else if(R>7){G11='C';}
  else if(R>5){G11='D';}
  else if(R>4){G11='P';}
  else if(R>3){G11='Q';}
  else if(R>2){G11='R';}
  else{G11='S';}
  Serial.println(G11);

    //Udp.parsePacket(); 
    //Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
    Udp.beginPacket("192.168.3.104", 88888);
    Udp.write(G11);
    Udp.endPacket();
    delay(1000);
    Udp.flush();
}




KODE RECEIVE DATA


#include <SPI.h>         // needed for Arduino versions later than 0018
#include <Ethernet.h>
#include <EthernetUdp.h>         // UDP library from: bjoern@cs.stanford.edu 12/30/2008

byte mac[] = {
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
};
IPAddress ip(192, 168, 3, 100);

unsigned int localPort = 8888;     
char packetBuffer[UDP_TX_PACKET_MAX_SIZE]; 
EthernetUDP Udp;

void setup() {
  Ethernet.begin(mac, ip);
 
  Udp.begin(localPort);
  Serial.begin(9600);
 while (!Serial) {
   ; // wait for serial port to conn
 }
 Serial.print("IP  address:");
 Serial.println(Ethernet.localIP());
}

void loop() {
  int packetSize = Udp.parsePacket(); 
  if (packetSize) {
    Udp.read(packetBuffer, UDP_TX_PACKET_MAX_SIZE);
    Serial.println(packetBuffer);
    //Serial.println("^^^^^^^^^");
    //Serial.println(packetSize);
   // Serial.println("+++++++++");
 
  }
  delay(1000);
}


hanya itu?...ya.....tapi ada makna mendalam di dalamnyaaaaaaaaaaaaaa,,,, ,-)