// Tweet Switch by http://www.brianmoreau.com/projects/social-devices/arduino-tweet-switch.php
// Updates your Twitter Status when switch is made
const int buttonPin = 2;     // the number of the pushbutton pin
const int ledPin =  8;      // the number of the LED tweet pin
int buttonState = 0;         // variable for reading the pushbutton status

// load SPI COMM and wifi library
#include <SPI.h>
#include <WiFi.h>

// Your wifi network name and password
// char ssid[] = "YOUR NETWORK NAME";      //  your network SSID (name)
//char pass[] = "PASSWORD or WEB KEY";     // your network password (use for WPA, or use as key for WEP)   
int keyIndex = 0;                          // your network key Index number (needed only for WEP)
int status = WL_IDLE_STATUS;               // status of the wifi connection
char myStatus = 0;                         // status when tween sent

// Initialize the Wifi client library
WiFiClient client;
// server to connect to : This is the domain where your PHP script is stored  
char server[] = "www.brianmoreau.com";
// tweet: This is the status or tweet mesage you want to send to twitter, use %20 for spaces as the message should be URL encoded
String tweet = "TEST%20TWEET%20from%20Arduino%20WiFi";
// tweet command url: modify the dirname to match the location url of yoru PHP script
// change the value of k= to match the key in your PHP script to prevent unauthorised access 
String url = "GET /dirname/twitterapi.php?k=123456&c=TWEET&v=" + tweet + " HTTP/1.1";

void setup() {
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT); 
  // initialize the LED pin as an output:
  pinMode(ledPin, OUTPUT);
  //Initialize serial and wait for port to open:
  Serial.begin(9600); 
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }
  // check for the presence of the shield:
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present, try reset."); 
    // don't continue:
    while(true);
  }
  // attempt to connect to Wifi network:
  while ( status != WL_CONNECTED) { 
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(ssid);
    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:    
    status = WiFi.begin(ssid, pass);
    // wait 5 seconds for next try 
    delay(5000);
  } 
  // show led connected status
digitalWrite(ledPin2, HIGH);
  // you're connected now, so print device and network info:
  printWifiStatus();
} // end setup

void loop() {
  // print the output wifi buffer if data exists
  while (client.available()) {
    char c = client.read();
    Serial.write(c);
  }
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);
      if (buttonState == HIGH) {     
        // turn tweet LED on:    
        digitalWrite(ledPin, HIGH);
        sendTweet();  
      } else {
      // switch not closed
      // turn tweet LED off:
      digitalWrite(ledPin, LOW); 
      }
} // end loop

void printWifiStatus() {
  Serial.print("Firmware V: ");
  Serial.println(WiFi.firmwareVersion());

  // print the SSID of the network you're attached to:
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());

  // print your WiFi shield's IP address:
  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);
  
   // print the MAC address of the router you're attached to:
  byte bssid[6];
  WiFi.BSSID(bssid);    
  Serial.print("BSSID: ");
  Serial.print(bssid[5],HEX);
  Serial.print(":");
  Serial.print(bssid[4],HEX);
  Serial.print(":");
  Serial.print(bssid[3],HEX);
  Serial.print(":");
  Serial.print(bssid[2],HEX);
  Serial.print(":");
  Serial.print(bssid[1],HEX);
  Serial.print(":");
  Serial.println(bssid[0],HEX);
  
  // print your subnet mask:
  IPAddress subnet = WiFi.subnetMask();
  Serial.print("NetMask: ");
  Serial.println(subnet);

  // print your gateway address:
  IPAddress gateway = WiFi.gatewayIP();
  Serial.print("Gateway: ");
  Serial.println(gateway);

  // print the received signal strength:
  long rssi = WiFi.RSSI();
  Serial.print("signal strength (RSSI):");
  Serial.print(rssi);
  Serial.println(" dBm");
  
  // print the encryption type:
  byte encryption = WiFi.encryptionType();
  Serial.print("Encryption Type:");
  Serial.println(encryption,HEX);
  
  // TKIP (WPA) = 2 
  // WEP = 5 
  // CCMP (WPA) = 4 
  // NONE = 7 
  // AUTO = 8 

} 

// this function makes the HTTP connection to the server:
void sendTweet() {
  // if tweet not sent
       while (myStatus == 0) {
         // attempt to connect to web adderss server
         if (client.connect(server, 80)) {
           Serial.println();
           Serial.print("Connecting to ");
           Serial.println(server);
           client.println();
           // send the HTTP PUT / GET request
           // not secure, look at using POST 
           client.println(url);
           client.println("Host: www.brianmoreau.com");
           client.println("User-Agent: arduino-ethernet");
           client.println("Connection: close");
           client.println();
           myStatus = 1;
         } else {
          // fail http req
          // note not a fail if page not found as get 404
          Serial.println("http failed");
          client.println();
         }
       } // end while not sent
       // reset the sent status
       myStatus = 0;
      // wait 10 seconds to avoid continious tweeting because of button bounce
      delay(10000);
}