Problems connecting uno to internet using ethernet [solved]

Projects Networking, Protocols, and Devices
1

Hi all

been stuck trying to connect my uno board with Ethernet shield to the internet using my bt home hub. Have tried the web server sketch which worked fine but the moment i try to go to the internet it refuses to connect.

please see below the code i am trying to run

#include <SPI.h>
#include <Client.h>
#include <Ethernet.h>
#include <Server.h>
#include <Udp.h>

byte mac[] = { 0x90, 0xA2, 0xDA, 0x0D, 0x9C, 0x35 };  
byte ip[] = { 192, 168, 1, 97 };    
byte gateway[] = { 192, 168, 1, 254 };
byte subnet[] = { 255, 255, 255, 0 };
// www.google.com ip
byte server[] = { 74, 125, 226, 242 };

EthernetClient client;

int loopCount = 0;

void setup()
{
  
  Ethernet.begin(mac, ip, gateway, subnet); 
  Serial.begin(9600);
  pinMode(13,OUTPUT);
  
  if (client.connect(server, 80)) {
    Serial.println("connected");
  } else {
    Serial.println("connection failed");
  }
}

void loop()
{
  int thisByte;
  int newCount = 0;    

  if(client.connected())
  {
    newCount = client.available();

//    if(newCount > 0) thisByte = client.read();    

    Serial.print("Available ");
    Serial.println(newCount, DEC);
  }
  else if(loopCount == 0)
  {
    // if not connected, attempt to reconnect
    client.stop();

    Serial.print("Connecting...");
    delay(10);
    
    if (client.connect(server, 80)) {
      Serial.println("ok");
    } else {
      Serial.println("failed.");
      delay(10);
    }
  }

  // heartbeat
  if(loopCount > 8)
  {
    digitalWrite(13,HIGH); 
    loopCount = 0;
  }
  else
  {
    loopCount = loopCount++;
  }

  if(loopCount == 4)
  {
    digitalWrite(13,LOW); 
  }

  delay(100);
}

code was taken from surfer tim and modified slightly (orginal code http://arduino.cc/forum/index.php/topic,70988.45.html).
when running code i just get connection failed time and time again

can't help but think it's a problem with my router (bt home hub 3), was wondering if anyone had any experience using this type of router with the ethernet shield?

cheers all

herroc

2

Ethernet.begin() now takes FIVE arguments: mac, ip, dns, gateway, and subnet. Since you did not specify the DNS Server address your 'subnet' is being used for the 'gateway' argument. This will prevent it from working.

Typically the DNS Server address is the same as the Default Gateway address so try:

  Ethernet.begin(mac, ip, gateway, gateway, subnet);
3

Is your router address indeed 192.168.1.254 ? often it is .1.1

4

thanks so much, the problem was with the missing gateway argument.

thanks for your time

kindest regards

herroc