/* Pachube sensor client 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. Circuit: * Analog sensor attached to analog in 0 * Ethernet shield attached to pins 10, 11, 12, 13 created 15 March 2010 updated 25 July 2010 by Tom Igoe http://www.tigoe.net/pcomp/code/category/arduinowiring/873 This code is in the public domain. */ #include #include // assign a MAC address for the ethernet controller. // fill in your address here: byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED}; // assign an IP address for the controller: byte ip[] = { 192,169,1,20 }; byte gateway[] = { 192,168,1,1}; byte subnet[] = { 255, 255, 255, 0 }; // The address of the server you want to connect to (pachube.com): byte server[] = { 209,40,205,190 }; // initialize the library instance: Client client(server, 80); 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 the ethernet connection and serial port: Ethernet.begin(mac, ip); Serial.begin(9600); // give the ethernet module time to boot up: delay(1000); } void loop() { // read the analog sensor: int sensorReading = analogRead(0); // 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(sensorReading); } // 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(int thisData) { // if there's a successful connection: if (client.connect()) { 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: "); // calculate the length of the sensor reading in bytes: int thisLength = getLength(thisData); client.println(thisLength, 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, DEC); // note the time that the connection was made: lastConnectionTime = millis(); } else { // if you couldn't make a connection: Serial.println("connection failed"); } } // This method calculates the number of digits in the // sensor reading. Since each digit of the ASCII decimal // representation is a byte, the number of digits equals // the number of bytes: int getLength(int someValue) { // there's at least one byte: int digits = 1; // continually divide the value by ten, // adding one to the digit count for each // time you divide, until you're at 0: int dividend = someValue /10; while (dividend > 0) { dividend = dividend /10; digits++; } // return the number of digits: return digits; }