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[on:]

Hi,

I am in trouble because with the ethernet shield the serial monitor reply always "Failed to configure Ethernet using DHCP"
The ide is the 1.01 and the router id a d-link.

the sketch:

Code:

/*
  DHCP-based IP printer
 
 This sketch uses the DHCP extensions to the Ethernet library
 to get an IP address via DHCP and print the address obtained.
 using an Arduino Wiznet Ethernet shield.
 
 Circuit:
 * Ethernet shield attached to pins 10, 11, 12, 13
 
 created 12 April 2011
 modified 9 Apr 2012
 by Tom Igoe
 
 */

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

// Initialize the Ethernet client library
// with the IP address and port of the server
// that you want to connect to (port 80 is default for HTTP):
EthernetClient client;

void setup() {
 // Open serial communications and wait for port to open:
  Serial.begin(9600);
  // this check is only needed on the Leonardo:
   while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }

  // 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("My IP address: ");
  for (byte thisByte = 0; thisByte < 4; thisByte++) {
    // print the value of each byte of the IP address:
    Serial.print(Ethernet.localIP()[thisByte], DEC);
    Serial.print(".");
  }
  Serial.println();
}

void loop() {

}

[Reply #1 on:]

Some test code to try:

Code:

//zoomkat 2-13-12
//DNS and DHCP-based web client test code
//for use with IDE 1.0
//open serial monitor and send an e to test
//and to see test result
//for use with W5100 based ethernet shields
//browser equivelant URL:
// http://web.comporium.net/~shb/arduino.txt
//note that the below bug fix may be required
// http://code.google.com/p/arduino/issues/detail?id=605

#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(){
  Serial.begin(9600);
  Serial.println("DNS and DHCP-based web client test 2/13/12"); // so I can keep track of what is loaded
  Serial.println("Send an e in serial monitor to test"); // what to do to test
  // 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:
    while(true);
  }
  // print your local IP address:
  Serial.print("Arduino IP address: ");
  for (byte thisByte = 0; thisByte < 4; thisByte++) {
    // print the value of each byte of the IP address:
    Serial.print(Ethernet.localIP()[thisByte], DEC);
    Serial.print(".");
  }
  Serial.println();
  Serial.println();
}

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/1.0"); //download text
    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

}

[Reply #2 on:]

Do you have a memory card in the microSD slot? If so, power down the Arduino and remove the memory card, then try it again.

[Reply #3 on:]

Some test code to try:

Code:

//zoomkat 2-13-12
//DNS and DHCP-based web client test code
//for use with IDE 1.0
//open serial monitor and send an e to test
//and to see test result
//for use with W5100 based ethernet shields
//browser equivelant URL:
// http://web.comporium.net/~shb/arduino.txt
//note that the below bug fix may be required
// http://code.google.com/p/arduino/issues/detail?id=605

#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(){
  Serial.begin(9600);
  Serial.println("DNS and DHCP-based web client test 2/13/12"); // so I can keep track of what is loaded
  Serial.println("Send an e in serial monitor to test"); // what to do to test
  // 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:
    while(true);
  }
  // print your local IP address:
  Serial.print("Arduino IP address: ");
  for (byte thisByte = 0; thisByte < 4; thisByte++) {
    // print the value of each byte of the IP address:
    Serial.print(Ethernet.localIP()[thisByte], DEC);
    Serial.print(".");
  }
  Serial.println();
  Serial.println();
}

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/1.0"); //download text
    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

}

Thanks for help!!
I tried this sketch but the serial monitor replies:

DNS and DHCP-based web client test 2/13/12
Send an e in serial monitor to test
Failed to configure Ethernet using DHCP

About the shield ethernet , it doesn't include a micro sd slot.

[Reply #4 on:]

No microSD slot? Does the ethernet shield have a w5100 or enc28j60 processor? Maybe a link to that shield would help.

[Reply #5 on:]

No microSD slot? Does the ethernet shield have a w5100 or enc28j60 processor? Maybe a link to that shield would help.

Yes mate, it's enc28j60 processor.Thanks I know about it now. So I downlaoded the library ErtherCard from https://github.com/jcw/ethercard ,but IT doesn't work too

I loaded this sketch:

Code:

// Ping a remote server, also uses DHCP and DNS.
// 2011-06-12 <jc@wippler.nl> http://opensource.org/licenses/mit-license.php

#include <EtherCard.h>

// ethernet interface mac address, must be unique on the LAN
static byte mymac[] = { 0x74,0x69,0x69,0x2D,0x30,0x31 };

byte Ethernet::buffer[700];
static uint32_t timer;

// called when a ping comes in (replies to it are automatic)
static void gotPinged (byte* ptr) {
  ether.printIp(">>> ping from: ", ptr);
}

void setup () {
  Serial.begin(9600);
  Serial.println("\n[pings]");
 
  if (ether.begin(sizeof Ethernet::buffer, mymac) == 0)
    Serial.println( "Failed to access Ethernet controller");
  if (!ether.dhcpSetup())
    Serial.println("DHCP failed");

  ether.printIp("IP:  ", ether.myip);
  ether.printIp("GW:  ", ether.gwip);

#if 1
  // use DNS to locate the IP address we want to ping
  if (!ether.dnsLookup(PSTR("www.google.com")))
    Serial.println("DNS failed");
#else
  ether.parseIp(ether.hisip, "74.125.77.99");
#endif
  ether.printIp("SRV: ", ether.hisip);
   
  // call this to report others pinging us
  ether.registerPingCallback(gotPinged);
 
  timer = -9999999; // start timing out right away
  Serial.println();
}

void loop () {
  word len = ether.packetReceive(); // go receive new packets
  word pos = ether.packetLoop(len); // respond to incoming pings
 
  // report whenever a reply to our outgoing ping comes back
  if (len > 0 && ether.packetLoopIcmpCheckReply(ether.hisip)) {
    Serial.print("  ");
    Serial.print((micros() - timer) * 0.001, 3);
    Serial.println(" ms");
  }
 
  // ping a remote server once every few seconds
  if (micros() - timer >= 5000000) {
    ether.printIp("Pinging: ", ether.hisip);
    timer = micros();
    ether.clientIcmpRequest(ether.hisip);
  }
}

some problems: 

1) the original sketch has 57600 baud rate , but with this value the serial monitor shows odd characters.
   so I changed 57600 to 9600 (only this one works).

2)Mostly the sketch(on the serial monitor) breaks with the first print "Ping"

3) sometimes (one time so far) it written
 Failed to access Ethernet controller,
 etc,,
 with all values at 0.0.0.0 , clearly.

So I am in trouble again

[Reply #6 on:]

I build a homemade board with a 328 and the ENC and is working great.

But some examples from ethercard are not working, all most some function at the library are missing.

The example that I can't compile is this:

Code:

GetDHCPandDNS

The function that I can't found is this:

Code:

ether.dhcpExpired()

Other thing is use the reset pin from the ENC before do the DHCP procedure.

Best Regards
Frank

[Reply #7 on:]

So, how does one use both the Ethernet connection on DHCP and use a card in the microSD slot? I'd like to connect to a server and write some data from that server to the card. It sounds like the microSD card makes the DHCP address assignment fail. I'm seeing this behavior on my Arduino UNO. Does anyone have any examples of code using both simultaneously?

[Reply #8 on:]

DHCP and "server" may not play well together. You generally need to assign an IP address to the server so a client will have a knowm IP address to connect to. The below discussion has some server and SD card code.

http://arduino.cc/forum/index.php/topic,144675.0.html

[Reply #9 on:]

You must disable one to start the other. See if this code starts the SD and w5100 ok for you.

Code:

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

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

void setup() {
  Serial.begin(9600);

  // disable w5100 SPI while starting SD
  pinMode(10, OUTPUT);
  digitalWrite(10, HIGH);

  Serial.print(F("Starting SD..."));
  if(!SD.begin(4)) Serial.println(F("failed"));
  else Serial.println(F("ok"));

  Serial.print(F("Starting ethernet..."));
  if(!Ethernet.begin(mac)) Serial.println(F("failed"));
  else Serial.println(Ethernet.localIP());
  digitalWrite(10, HIGH);
}

void loop() {
}

I used the F() function to keep the static strings in program memory.