Hi,
I have a problem with my arduino UNO and Ethernet shield, in fact i try to use the DHCPAdressPrinter, in the program exemple, but in fact, the program don't go after ethernet.begin() and my card never get connected 
i have FDX and LINK in orange , act is blinking sometime, and 100m in green, and the ethernet port is green and orange but don't blink , can you help me ?
Thanks alot !
Best regards !
Do you have a SD card in the shield's slot?
If the DHCP begin fails, it takes 2 minutes to return a fail. Does it return a fail, or just freezes there?
SurferTim:
Do you have a SD card in the shield's slot?If the DHCP begin fails, it takes 2 minutes to return a fail. Does it return a fail, or just freezes there?
I don't have SD plugged in , and it shows nothing, just freezing apparently
I also tryed this code and in this code :
#include <SPI.h>
#include <Ethernet.h>
// 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, 0, 15);
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);
void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
Serial.println("Hi");
while (!Serial) {
Serial.println("blup");
; // wait for serial port to connect. Needed for native USB port only
}
// start the Ethernet connection and the server:
Serial.println("eth begin");
Ethernet.begin(mac, ip);
Serial.println("srv begin");
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
}
void loop() {
// listen for incoming clients
EthernetClient client = server.available();
if (client) {
Serial.println("new client");
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
Serial.write(c);
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the http request has ended,
// so you can send a reply
if (c == '\n' && currentLineIsBlank) {
// send a standard http response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close"); // the connection will be closed after completion of the response
client.println("Refresh: 5"); // refresh the page automatically every 5 sec
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
// output the value of each analog input pin
for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
int sensorReading = analogRead(analogChannel);
client.print("analog input ");
client.print(analogChannel);
client.print(" is ");
client.print(sensorReading);
client.println("
");
}
client.println("</html>");
break;
}
if (c == '\n') {
// you're starting a new line
currentLineIsBlank = true;
} else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
Serial.println("client disconnected");
}
}
it freez at server.begin();
Try this test code. It checks the SPI bus. If the serial monitor shows 192.168.0.2, then you are ok there. If not, you have a SPI problem.
#include <SPI.h>
#include <Ethernet.h>
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,0,2);
void setup() {
Serial.begin(9600);
// disable SD card if one in the slot
pinMode(4,OUTPUT);
digitalWrite(4,HIGH);
Serial.println("Starting w5100");
Ethernet.begin(mac,ip);
Serial.println(Ethernet.localIP());
}
void loop() {
}
SurferTim:
Try this test code. It checks the SPI bus. If the serial monitor shows 192.168.0.2, then you are ok there. If not, you have a SPI problem.#include <SPI.h>
#include <Ethernet.h>
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,0,2);
void setup() {
Serial.begin(9600);
// disable SD card if one in the slot
pinMode(4,OUTPUT);
digitalWrite(4,HIGH);
Serial.println("Starting w5100");
Ethernet.begin(mac,ip);
Serial.println(Ethernet.localIP());
}
void loop() {
}
It shows :
Starting w5100
0.223.223.223
Then you have a SPI problem.
edit: Are you certain it is a w5100 IC? Or maybe a w5200 or w5500?
SurferTim:
Then you have a SPI problem.edit: Are you certain it is a w5100 IC? Or maybe a w5200 or w5500?
This is a W550
If you are using the standard ethernet library included with the IDE, then that is your problem. I use this one.
I have the W5500, can you tell me how to use your library for it ?
What OS does your PC use? I can help you if it is Linux (Ubuntu). I'm not a Windows person.
PC, i added the library it said installed, now , how i use it ? 
When I installed mine (Linux/Ubuntu), I put it in my "$HOME/Arduino/libraries/" directory. I use it just like the original. The IDE compiler displays a message that it has found two ethernet libraries, and it is using the one in "Arduino/libraries/" directory.
It seems to works, it print me an ip , i'll try the Webserver sketch and i'll tell you if it works !
If it is now showing the correct IP, you should be good to go.
It works perfectly thanks alot!