Twitter Arduino Client.

i really dont understand about this coding especially

String currentLine = “”; // string to hold the text from server
String tweet = “”; // string to hold the tweet ,

can some one explain for me

#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 = {
0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x01 };
IPAddress ip(192,168,1,20);

// initialize the library instance:
EthernetClient client;

const int requestInterval = 60000; // delay between requests

char serverName = “api.twitter.com”; // twitter URL

boolean requested; // whether you’ve made a request since connecting
long lastAttemptTime = 0; // last time you connected to the server, in milliseconds
:stuck_out_tongue:
String currentLine = “”; // string to hold the text from server
String tweet = “”; // string to hold the tweet
boolean readingTweet = false; // if you’re currently reading the tweet

void setup() {
// reserve space for the strings:
currentLine.reserve(256);
tweet.reserve(150);

// initialize serial:
Serial.begin(9600);
// attempt a DHCP connection:
if (!Ethernet.begin(mac)) {
// if DHCP fails, start with a hard-coded address:
Ethernet.begin(mac, ip);
}
// connect to Twitter:
connectToServer();
}

void loop()
{
if (client.connected()) {
if (client.available()) {
// read incoming bytes:
char inChar = client.read();

// add incoming byte to end of line:
currentLine += inChar;

// if you get a newline, clear the line:
if (inChar == ‘\n’) {
currentLine = “”;
}
// if the current line ends with , it will
// be followed by the tweet:
if ( currentLine.endsWith("")) {
// tweet is beginning. Clear the tweet string:
readingTweet = true;
tweet = “”;
}
// if you’re currently reading the bytes of a tweet,
// add them to the tweet String:
if (readingTweet) {
if (inChar != ‘<’) {
tweet += inChar;
}
else {
// if you got a “<” character,
// you’ve reached the end of the tweet:
readingTweet = false;
Serial.println(tweet);
// close the connection to the server:
client.stop();
}
}
}
}
else if (millis() - lastAttemptTime > requestInterval) {
// if you’re not connected, and two minutes have passed since
// your last connection, then attempt to connect again:
connectToServer();
}
}

void connectToServer() {
// attempt to connect, and wait a millisecond:
Serial.println(“connecting to server…”);
if (client.connect(serverName, 80)) {
Serial.println(“making HTTP request…”);
// make HTTP GET request to twitter:
client.println(“GET /1/statuses/user_timeline.xml?screen_name=arduino&count=1 HTTP/1.1”);
client.println(“HOST: api.twitter.com”);
client.println();
}
// note the time of this connect attempt:
lastAttemptTime = millis();
}

Was there a question in there somewhere?

yeah, on page 4 as i am writing this

yeah, on page 4 as i am writing this

Really? On page 4 of what?

networking, protocols and devices