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Topic: [Share] Turning ON/OFF LED with Twitter (Read 1 time) previous topic - next topic


Nov 10, 2014, 08:06 pm Last Edit: Jan 02, 2017, 07:33 am by arizpk
How to Turning ON/OFF LED with twitter?

1. You must have twitter acount.  :D
2. Prepare Ethernet Shield + Arduino Uno. (or etc).
3. LED, UTP Cable with RJ45.
4. Connect Anode LED to PIN DIGITAL 8 in Arduino UNO, and Katode LED to GND.
5. You must connect Ethernet Shield to Internet with UTP Cable. You can conncet internet with internet sharing in your PC.
6. Let's Code Here.
Code: [Select]

#include <SPI.h>
#include <Ethernet.h>

// Enter a MAC address for your controller below.
// Newer Ethernet shields have a MAC address printed on a sticker on the shield
byte mac[] = {
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
// if you don't want to use DNS (and reduce your sketch size)
// use the numeric IP instead of the name for the server:
//IPAddress server(31,220,16,46);  // numeric IP for apkit (no DNS)
char server[] = "apkit.id";    // name address for apkit (using DNS)
IPAddress ip(192,168,137,177);

// 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):
EthernetClient client;
const unsigned long requestInterval = 10000;
boolean requested;                   // whether you've made a request since connecting
unsigned 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
String lasttweet = "";
boolean readingTweet = false;
int led=8; //LED on PIN 8;

String username="username"; //twitter username to read target status.
String access_token="Your access Token";//access token your account can be found in http://apkit.esy.es/twitteroauth/request/
String access_token_secret="Your Access Token Secret";//access token secret your account can be found in http://apkit.id/twitteroauth/request/
String count_status="1";

void setup() {
  //declare led or pin 3 to OUTPUT
  // Open serial communications and wait for port to open:

  // start the Ethernet connection:
  Serial.println("Autoconfigure Ethernet using DHCP");
  if (Ethernet.begin(mac) == 0) {
    Serial.println("Failed to configure Ethernet using DHCP");
    // no point in carrying on, so do nothing forevermore:
    // try to congifure using IP address instead of DHCP:
    Ethernet.begin(mac, ip);
  Serial.print("My address:");
  // give the Ethernet shield a second to initialize:

  // if you get a connection, report back via serial:

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("Your Status:"); 
          if (tweet=="LED TURN ON"){
            Serial.println("Action :");
            Serial.println("LED ON");
          if (tweet=="LED OFF){
            Serial.println("Action :");
            Serial.println("LED TURN OFF");
          // close the connection to the server:
  else if (millis() - lastAttemptTime > requestInterval) {
    // if you're not connected, and two minutes have passed since
    // your last connection, then attempt to connect again:
void connectToServer() {
  // attempt to connect, and wait a millisecond:
  Serial.println("connecting to server...");
  if (client.connect(server, 80)) {
    // Make a HTTP request:
    client.println("GET /twitteroauth/status.php?username=" + username + "&access_token=" + access_token + "&access_token_secret=" + access_token_secret + "&count=" + count_status + " HTTP/1.1");
    client.println("Host: apkit.id");
    client.println("Connection: close");
  else {
    // kf you didn't get a connection to the server:
    Serial.println("connection failed");
  // note the time of this connect attempt:
  lastAttemptTime = millis();

You must put your twitter access token in that code.
You can get your twitter acces acount in this link http://apkit.id/twitteroauth/request/.

7. Compile and Upload in Your Arduino.
8. You tweet LED ON or LED OFF in twitter. And LED will be turn on or turn off.

I hope this is useful


Hello, there is problem with getting twitter access account from link, so oauth  request doesn't work. It returns  "Could not connect to Twitter. Refresh the page or try again later."


Hello, there is problem with getting twitter access account from link, so oauth  request doesn't work. It returns  "Could not connect to Twitter. Refresh the page or try again later."
I was fixed about that issue. I was changed link and server to authentication with twitter. You can try again.

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