Quadrotor

/*

  Pachube sensor client with Strings

 This sketch connects an analog sensor to Pachube (http://www.pachube.com)

 using a Wiznet Ethernet shield. You can use the Arduino Ethernet shield, or

 the Adafruit Ethernet shield, either one will work, as long as it's got

 a Wiznet Ethernet module on board.

 This example uses the String library, which is part of the Arduino core from

 version 0019.  

 Circuit:

 * Analog sensor attached to analog in 0

 * Ethernet shield attached to pins 10, 11, 12, 13

 created 15 March 2010

 updated 26 Oct 2011

 by Tom Igoe

 This code is in the public domain.

 */

#include <SPI.h>

#include <Ethernet.h>

// assign a MAC address for the ethernet controller.

// fill in your address here:

byte mac[] = { 

  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};

// fill in an available IP address on your network here,

// for manual configuration:

IPAddress ip(10,0,1,20);

// initialize the library instance:

EthernetClient client;

long lastConnectionTime = 0;        // last time you connected to the server, in milliseconds

boolean lastConnected = false;      // state of the connection last time through the main loop

const int postingInterval = 10000;  //delay between updates to Pachube.com

void setup() {

  // start serial port:

  Serial.begin(9600);

  // give the ethernet module time to boot up:

  delay(1000);

  // start the Ethernet connection:

  if (Ethernet.begin(mac) == 0) {

    Serial.println("Failed to configure Ethernet using DHCP");

    // Configure manually:

    Ethernet.begin(mac, ip);

  }

}

void loop() {

  // read the analog sensor:

  int sensorReading = analogRead(A0);   

  // convert the data to a String to send it:

  String dataString = String(sensorReading);

  // you can append multiple readings to this String if your

  // pachube feed is set up to handle multiple values:

  int otherSensorReading = analogRead(A1);

  dataString += ",";

  dataString += String(otherSensorReading);

  // if there's incoming data from the net connection.

  // send it out the serial port.  This is for debugging

  // purposes only:

  if (client.available()) {

    char c = client.read();

    Serial.print(c);

  }

  // if there's no net connection, but there was one last time

  // through the loop, then stop the client:

  if (!client.connected() && lastConnected) {

    Serial.println();

    Serial.println("disconnecting.");

    client.stop();

  }

  // if you're not connected, and ten seconds have passed since

  // your last connection, then connect again and send data:

  if(!client.connected() && (millis() - lastConnectionTime > postingInterval)) {

    sendData(dataString);

  }

  // store the state of the connection for next time through

  // the loop:

  lastConnected = client.connected();

}

// this method makes a HTTP connection to the server:

void sendData(String thisData) {

  // if there's a successful connection:

  if (client.connect("www.pachube.com", 80)) {

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

    // send the HTTP PUT request. 

    // fill in your feed address here:

    client.print("PUT /api/YOUR_FEED_HERE.csv HTTP/1.1\n");

    client.print("Host: www.pachube.com\n");

    // fill in your Pachube API key here:

    client.print("X-PachubeApiKey: YOUR_KEY_HERE\n");

    client.print("Content-Length: ");

    client.println(thisData.length(), DEC);

    // last pieces of the HTTP PUT request:

    client.print("Content-Type: text/csv\n");

    client.println("Connection: close\n");

    // here's the actual content of the PUT request:

    client.println(thisData);

    // note the time that the connection was made:

    lastConnectionTime = millis();

  } 

  else {

    // if you couldn't make a connection:

    Serial.println("connection failed");

  }

}