Hello,

just managed to get my arduino posting the first tweet. Lacking programming skills this is only a rude skeleton of a final program

Nevertheless, here is the code, maybe it helps someone (i found nearly nothing according to twitter in this forum) have fun!



Code:

// a brute test of twittering with arduino.
// source for handling the twitter api was http://pratham.name/post/39551949/twitter-php-script-without-curl
// the scetch lacks a lot of functionality, the encoding of username and password must be done separately
// and the message is fixed (text is "Yahoo, im twittering!")
//
// this is due to my ony basic knowledge
// maybe someone can use this snippet and have fun with it


#include <Ethernet.h>

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
byte ip[] = { 192, 168, 2, 10 };			    // this is the ip within my lan
byte gateway[] = { 192, 168, 2, 1 };			// neccessary to get access to the internet via your router
byte subnet[] = { 255, 255, 255, 0 };
byte server[] = { 128, 121, 146, 100 };		   // Twitter's ip

Client client(server, 80);

void setup()
{
  Ethernet.begin(mac, ip, gateway, subnet);
  Serial.begin(9600);

  delay(1000);
  Serial.println("connecting...");

  if (client.connect()) {
    Serial.println("connected");
    client.println("POST http://twitter.com/statuses/update.json HTTP/1.1");
    client.println("Host: twitter.com");
    client.println("Authorization: Basic #################");    // the string of ###s after "Basic" is the base64_encoded Text of username:password of your twitter account
												// you can do the encoding at this site: http://www.functions-online.com/en/base64_encode.html
    client.println("Content-type: application/x-www-form-urlencoded");
    client.println("Content-length: 28");					 // this is the length of the text "Yahoo, im twittering!"
    client.println("Connection: Close");
    client.println();
    client.print("status=Yahoo, im twittering!");

  } else {
    Serial.println("connection failed");
  }
}

void loop()
{
  if (client.available()) {
    char c = client.read();
    Serial.print(c);
  }

  if (!client.connected()) {
    Serial.println();
    Serial.println("disconnecting.");
    client.stop();
    for(;;)
	;
  }
} 

I'm pretty rubbish at programming, too, but from a simple skeleton like that, I'm sure I can figure out how to do interesting things. Thanks for sharing!

Now does anyone have any idea how to send a tweet everytime a button is pressed?

Thanks,

Alan

I tried using the twitter example on the Arduino website.
I entered my network info and userID & password only.
When I tried to upload it to the Arduino I get this error:
21: error: Twitter.h: No such file or directory In function 'void setup()':
Bad error line: -2

Line 21 is "int status = twitter.wait();"

Am I supposed to enter any more info?

Code:

void setup()
{
  Ethernet.begin(mac, ip, gateway, subnet);
  Serial.begin(9600);
  
  delay(1000);
  
  Serial.println("connecting ...");
  if (twitter.post(msg)) {
    int status = twitter.wait();
    if (status == 200) {
      Serial.println("OK.");
    } else {
      Serial.print("failed : code ");
      Serial.println(status);
    }
 

Thanks,

Alan

Yes I did read that.
The problem I am having is loading the code.
I am new to Arduino coding, but what does restarting the Arduino have anything to do with problems loading the code?

Thanks,

Alan

Ahhh OK...
I got what you are getting at.
I am using a mac for the programming so I might have messed up the file location.
I followed this thread.
I really should try and find a PC and try it again.

Thanks,

Alan

The HTTP error code 401 you got means "Authorization Required / Unauthorized".
Did you change the following line
Code:

Twitter twitter("YourID:Password"); 

as to your real twitter account?

Quote:
The cleaver clever library automatically encodes the characters, so you don't have to encode by yourself.
Please try to put your ID and Password directly.