Hello everyone,
My first time posting. Been playing with the arduino uno for a while now and this week decided to get the arduino ethernet shield. Considering how relatively easy learning the arduino was, this ethernet shield is driving me crazy.
I have been trying the webserver and webclient example sketches, and neither one lets me connect.
I had changed the MAC address to what came with the shield, IP address I assigned to it on my network, and have tried numerous server addresses ( both external internet webpages and local webpages running on my local webserver ). When I go into my router, I can see the arduino connected to my router. I can even ping it from the windows command prompt. But it does fail the ping about 25% of the time. I have tried different network cables, played with the baud rate, and also specifically opened a door for it in my firewall. Only thing I noticed was that the pinging of the arduino seemed to be more successful with a shorter network cable ( I found that odd ).
I have searched these forums and googled for days now without much success.
Does anyone have any suggestions or ideas? I would appreciate any help. Thanks!
This is all that is displayed in my serial monitor with the corresponding code beneath:
connecting...
connection failed
disconnecting.
/*
Web client
This sketch connects to a website (http://www.google.com)
using an Arduino Wiznet Ethernet shield.
Circuit:
* Ethernet shield attached to pins 10, 11, 12, 13
created 18 Dec 2009
by David A. Mellis
*/
#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[] = { 0x90, 0xA2, 0xDA, 0x00, 0x9F, 0xDC };
byte ip[] = { 192,168,1,177 };
byte server[] = { 208,104,2,86 }; // Google
//byte server[] = {192,168,1,3};
// 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):
Client client(server, 80);
void setup() {
// start the Ethernet connection:
Ethernet.begin(mac, ip);
// start the serial library:
Serial.begin(9600);
// give the Ethernet shield a second to initialize:
delay(1000);
Serial.println("connecting...");
// if you get a connection, report back via serial:
if (client.connect()) {
Serial.println("connected");
// Make a HTTP request:
client.println("GET /~shb/arduino.txt HTTP/1.0");
// client.println("GET /index1.html HTTP/1.0");
client.println();
}
else {
// kf you didn't get a connection to the server:
Serial.println("connection failed");
}
}
void loop()
{
// if there are incoming bytes available
// from the server, read them and print them:
if (client.available()) {
char c = client.read();
Serial.print(c);
}
// if the server's disconnected, stop the client:
if (!client.connected()) {
Serial.println();
Serial.println("disconnecting.");
client.stop();
// do nothing forevermore:
for(;;)
;
}
}