Failed to configure Ethernet using DHCP

Projects Networking, Protocols, and Devices
6

SurferTim:
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 GitHub - njh/EtherCard: EtherCard is an IPv4 driver for the ENC28J60 chip, compatible with Arduino IDE ,but IT doesn't work too :frowning:

I loaded this sketch:

// 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"

  1. 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 :frowning: