The below code does something similar to capture desired data from a very large ocean weather data file. The code counts line feeds in the received file and capture ~line 14 which contains the desired data. From what you posted your data would probably be somewhere near line 11.
//zoomkat 12-22-10
//simple ethernet client test code
//for use with IDE 0021 and W5100 ethernet shield
//modify the arduino lan ip address as needed
//open serial monitor to see what the arduino receives
//push the shield reset button to run client again
#include <SPI.h>
#include <Ethernet.h>
String readString, readString1;
int x=0;
char lf=10;
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
byte ip[] = { 192, 168, 1, 102 };
byte server[] = { 140, 90, 238, 27 }; // NOAA
Client client(server, 80);
void setup()
{
Ethernet.begin(mac, ip);
Serial.begin(9600);
Serial.println("starting simple arduino client test");
Serial.println();
Serial.println("connecting...");
if (client.connect()) {
Serial.println("connected");
client.println("GET /data/5day2/44013_5day.txt HTTP/1.0");
client.println();
} else {
Serial.println("connection failed");
}
}
void loop()
{
if (client.available()) {
char c = client.read();
//Serial.print(c); // uncomment to see raw feed
if (c==lf) x=(x+1);
if (x==14) readString += c;
//readString += c;
}
if (!client.connected()) {
client.stop();
Serial.println("Current data row:" );
Serial.print(readString);
Serial.println();
readString1 = (readString.substring(41,43));
Serial.println();
Serial.print("DPD sec: ");
Serial.println(readString1);
Serial.println("done");
for(;;);
}
}
