having trouble with the ethernet examples

Using Arduino Programming Questions
#1

i just cant see to get the addresses sorted in able to get them running .
the mac address has me stumped . how do i convert the mac address on the back of the ethernet board ?
there appears to be 4 addresses that need to be in the right format .the arduino books dont go into detail enough for a newby
i have the arduino cookbook for guidance but no use so far

#2

the arduino books dont go into detail enough for a newby

Why should they? Internet access is NOT a newbie project.

The MAC address sticker shows something like AB-CD-EF-01-02-03. The Mac array looks something like:
byte macAddr[6] = {0xAB, 0xCD, 0xEF, 0x01, 0x02, 0x03};

It really isn't that difficult to see how the characters on the sticker match those of the MAC address in the code.

i have the arduino cookbook for guidance but no use so far

Are you cooking your Arduino?

#3

thanks for the smartypants reply

it is if you have never done it before ,it might as well be martian language

#4

This is not a newbie project, but if you want to give it a try with a working example, here is my client code in the playground.
http://playground.arduino.cc/Code/WebClient

Here is my server code:
http://playground.arduino.cc/Code/WebServerST

zoomkat's code also works ok. Search this forum for his examples.

#5

it is if you have never done it before ,it might as well be martian language

That's why Ethernet and WiFi are not beginner projects. I've you have a decent background in client/server architecture, having connected two computers together, then replacing one of them with an Arduino is very simple. If you don't, then there approximately 14 bazillion things that go wrong, and troubleshooting them will drive you nuts.

#6

I don’t have any wifi stuff, but below is some simple client code you can try to see if it will work with your ethernet setup.

//zoomkat 9-22-12
//simple client test
//for use with IDE 1.0.1
//with DNS, DHCP, and Host
//open serial monitor and send an e to test
//for use with W5100 based ethernet shields
//remove SD card if inserted

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

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //physical mac address

char serverName[] = "web.comporium.net"; // zoomkat's test web page server
EthernetClient client;

//////////////////////

void setup(){

  if (Ethernet.begin(mac) == 0) {
    Serial.println("Failed to configure Ethernet using DHCP");
    // no point in carrying on, so do nothing forevermore:
    while(true);
  }

  Serial.begin(9600); 
  Serial.println("Better client test 9/22/12"); // so I can keep track of what is loaded
  Serial.println("Send an e in serial monitor to test"); // what to do to test
}

void loop(){
  // check for serial input
  if (Serial.available() > 0) //if something in serial buffer
  {
    byte inChar; // sets inChar as a byte
    inChar = Serial.read(); //gets byte from buffer
    if(inChar == 'e') // checks to see byte is an e
    {
      sendGET(); // call sendGET function below when byte is an e
    }
  }  
} 

//////////////////////////

void sendGET() //client function to send/receive GET request data.
{
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /~shb/arduino.txt HTTP/1.1"); //download text
    client.println("Host: web.comporium.net");
    client.println("Connection: close");  //close 1.1 persistent connection  
    client.println(); //end of get request
  } 
  else {
    Serial.println("connection failed"); //error message if no client connect
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //waits for data
  while (client.connected() || client.available()) { //connected or data available
    char c = client.read(); //gets byte from ethernet buffer
    Serial.print(c); //prints byte to serial monitor 
  }

  Serial.println();
  Serial.println("disconnecting.");
  Serial.println("==================");
  Serial.println();
  client.stop(); //stop client

}
#7