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- /*
- TweetLED Code
- This code is based on the code made by Tom Igoe and is used in episode 3 of the Mike's Lab Series on Youtube.
- */
- #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 = 30000; // 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
- 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:
- pinMode(7,OUTPUT);
- pinMode(8,OUTPUT);
- 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 <text>, it will
- // be followed by the tweet:
- if ( currentLine.endsWith("<text>")) {
- // 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();
- }
- if(tweet==">ledon")
- {
- digitalWrite(8,HIGH);
- }
- else if(tweet==">ledoff"){
- digitalWrite(8,LOW);
- }
- }
- 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=mpieters95&count=1 HTTP/1.1");
- client.println("HOST: api.twitter.com");
- client.println();
- }
- // note the time of this connect attempt:
- lastAttemptTime = millis();
- }
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