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137 lines
3.9 KiB
Plaintext
137 lines
3.9 KiB
Plaintext
/*
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Twitter client
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This sketch connects to Twitter (http://www.twitter.com)
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using a Wiznet Ethernet shield. You can use the Arduino Ethernet shield, or
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the Adafruit Ethernet shield, either one will work, as long as it's got
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a Wiznet Ethernet module on board.
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Circuit:
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* Switch connected to digital pin 2
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* Ethernet shield attached to pins 10, 11, 12, 13
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created 15 March 2010
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modified 23 July 2010
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by Tom Igoe
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http://www.tigoe.net/pcomp/code/category/arduinowiring/873
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This code is in the public domain.
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*/
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#include <SPI.h>
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#include <Ethernet.h>
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// pin that the pushButton is connected to:
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const int buttonPin = 2;
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// assign a MAC address for the ethernet controller.
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// fill in your address here:
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byte mac[] = {
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0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
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// assign an IP address for the controller:
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byte ip[] = {
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192,169,1,20 };
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byte gateway[] = {
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192,168,1,1};
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byte subnet[] = {
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255, 255, 255, 0 };
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// The server you want to connect to (twitter.com)
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byte server[] = {
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168,143,162,68};
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// initialize the library instance:
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Client client(server, 80);
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int lastButtonState = LOW; // last state of the pushbutton
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boolean connectedLastTime = false; // state of the connection last time through the main loop
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void setup() {
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// make the pushbutton's pin an input:
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pinMode(buttonPin, INPUT);
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// start the ethernet connection and serial port:
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Ethernet.begin(mac, ip);
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Serial.begin(9600);
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// give the ethernet module time to boot up:
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delay(1000);
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}
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void loop() {
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// if there's incoming data from the net connection.
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// send it out the serial port. This is for debugging
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// purposes only:
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if (client.available()) {
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char c = client.read();
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Serial.print(c);
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}
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// if there's no net connection, but there was one last time
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// through the loop, then stop the client:
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if (!client.connected() && connectedLastTime) {
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Serial.println("disconnecting.");
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client.stop();
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}
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// read the pushbutton input pin:
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int buttonState = digitalRead(buttonPin);
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// make a connection only when the button goes from LOW to HIGH:
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if ((buttonState != lastButtonState) && (buttonState == HIGH)) {
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// if you're not connected, then connect:
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if(!client.connected()) {
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sendData();
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}
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// save the current button state as the last state,
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//for next time through the loop
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}
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lastButtonState = buttonState;
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// store the state of the connection for next time through
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// the loop:
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connectedLastTime = client.connected();
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}
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// this method makes a HTTP connection to the server:
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void sendData() {
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// if there's a successful connection:
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if (client.connect()) {
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Serial.println("connecting...");
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// send the HTTP POST request:
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client.print("POST http://twitter.com/statuses/update.json HTTP/1.1\n");
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client.print("Host: twitter.com\n");
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// fill in your twitter login here. It needs to be
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// formatted like this: username:password
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// then it needs to be base64_encoded.
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// you can do that online at many sites, including this one:
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// http://www.tools4noobs.com/online_php_functions/base64_encode/
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// once encoded, it'll look like a random string of characters
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client.print("Authorization: Basic XXXXXXXXXXXXXXXXXXXXXXXX\n");
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client.print("Content-type: application/x-www-form-urlencoded\n");
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// content length of the status message that follows below:
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client.print("Content-Length: 26\n");
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client.println("Connection: Close\n");
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// generate a random number to add to the status message
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// to avoid duplicate status messages. This is a hack to get around
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// Twitter's requirement of unique status messages:
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int randomNumber = random(9);
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// here's the status message:
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client.print("status=Hello from Arduino");
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client.print(randomNumber);
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}
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else {
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// if you couldn't make a connection:
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Serial.println("connection failed");
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}
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}
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