Hi there!
I am trying out the ethernet shiield connected to an UNO, and I am running the
WebClientRepeating(modified address) and Im getting the Information that I want, but also a lot of stuff that i dont need.
How can I filter out the information i want from
char c = client.read();
Thanks!
What information are you getting that you dont' want? Post the sketch you're doing your tests with.
The filter you're looking for is usually done by parsing the content received with the client.read() method and using the information that you're interested in. As you haven't told us, what you're interested in, we cannot help you.
This is the code I am using, and the information I need is on this webpage :
It contains a text metrological report for a given airport/aerodrome.
The things I need to filter out is the html script, basically all but the met-report and TAF(Terminal Area Forecast)
Thanks for the speedy reply and as you can probably tell, I`m a bit of a noob 
/*
Repeating Web client
This sketch connects to a a web server and makes a request
using a Wiznet Ethernet shield. You can use the Arduino Ethernet shield, or
the Adafruit Ethernet shield, either one will work, as long as it's got
a Wiznet Ethernet module on board.
This example uses DNS, by assigning the Ethernet client with a MAC address,
IP address, and DNS address.
Circuit:
* Ethernet shield attached to pins 10, 11, 12, 13
created 19 Apr 2012
by Tom Igoe
http://arduino.cc/en/Tutorial/WebClientRepeating
This code is in the public domain.
*/
#include <SPI.h>
#include <Ethernet.h>
// assign a MAC address for the ethernet controller.
// fill in your address here:
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
// fill in an available IP address on your network here,
// for manual configuration:
IPAddress ip(192,168,0,20);
// fill in your Domain Name Server address here:
IPAddress myDns(8,8,8,8);
// initialize the library instance:
EthernetClient client;
char server[] = "www.aviationweather.gov";
unsigned long lastConnectionTime = 0; // last time you connected to the server, in milliseconds
boolean lastConnected = false; // state of the connection last time through the main loop
const unsigned long postingInterval = 30*1000; // delay between updates, in milliseconds
void setup() {
// start serial port:
Serial.begin(9600);
// give the ethernet module time to boot up:
delay(1000);
// start the Ethernet connection using a fixed IP address and DNS server:
Ethernet.begin(mac, ip, myDns);
// print the Ethernet board/shield's IP address:
Serial.print("My IP address: ");
Serial.println(Ethernet.localIP());
}
void loop() {
// if there's incoming data from the net connection.
// send it out the serial port. This is for debugging
// purposes only:
if (client.available()) {
char c = client.read();
Serial.print(c);
}
// if there's no net connection, but there was one last time
// through the loop, then stop the client:
if (!client.connected() && lastConnected) {
Serial.println();
Serial.println("disconnecting.");
client.stop();
}
// if you're not connected, and ten seconds have passed since
// your last connection, then connect again and send data:
if(!client.connected() && (millis() - lastConnectionTime > postingInterval)) {
httpRequest();
}
// store the state of the connection for next time through
// the loop:
lastConnected = client.connected();
}
// this method makes a HTTP connection to the server:
void httpRequest() {
// if there's a successful connection:
if (client.connect(server, 80)) {
Serial.println("connecting...");
// send the HTTP PUT request:
client.println("GET /adds/metars/?station_ids=ENTO&std_trans=standard&chk_metars=on&hoursStr=most+recent+only&chk_tafs=on&submitmet=Submit HTTP/1.1");
client.println("Host: www.aviationweather.gov");
client.println("User-Agent: arduino-ethernet");
client.println("Connection: close");
client.println();
// note the time that the connection was made:
lastConnectionTime = millis();
}
else {
// if you couldn't make a connection:
Serial.println("connection failed");
Serial.println("disconnecting.");
client.stop();
}
}
There are various ways to collect data from web pages. you might look at the TextFinder info below. If the page source isn't large, you might capture the whole page and extract the data. I've counted carriage returns to locate the desired data and then captured the desired lines for data extraction.