/* Xively sensor client with Strings This sketch connects an analog sensor to Xively, using an Arduino Yún. created 15 March 2010 updated 27 May 2013 by Tom Igoe http://arduino.cc/en/Tutorial/YunXivelyClient */ // include all Libraries needed: #include #include "passwords.h" // contains my passwords, see below /* NOTE: passwords.h is not included with this repo because it contains my passwords. You need to create it for your own version of this application. To do so, make a new tab in Arduino, call it passwords.h, and include the following variables and constants: #define APIKEY "foo" // replace your pachube api key here #define FEEDID 0000 // replace your feed ID #define USERAGENT "my-project" // user agent is the project name */ // set up net client info: const unsigned long postingInterval = 60000; //delay between updates to xively.com unsigned long lastRequest = 0; // when you last made a request String dataString = ""; void setup() { // start serial port: Bridge.begin(); Serial.begin(9600); while (!Serial); // wait for Network Serial to open Serial.println("Xively client"); // Do a first update immediately updateData(); sendData(); lastRequest = millis(); } void loop() { // get a timestamp so you can calculate reading and sending intervals: long now = millis(); // if the sending interval has passed since your // last connection, then connect again and send data: if (now - lastRequest >= postingInterval) { updateData(); sendData(); lastRequest = now; } } void updateData() { // convert the readings to a String to send it: dataString = "Temperature,"; dataString += random(10) + 20; // add pressure: dataString += "\nPressure,"; dataString += random(5) + 100; } // this method makes a HTTP connection to the server: void sendData() { // form the string for the API header parameter: String apiString = "X-ApiKey: "; apiString += APIKEY; // form the string for the URL parameter: String url = "https://api.xively.com/v2/feeds/"; url += FEEDID; url += ".csv"; // Send the HTTP PUT request // Is better to declare the Process here, so when the // sendData function finishes the resources are immediately // released. Declaring it global works too, BTW. Process xively; Serial.print("\n\nSending data... "); xively.begin("curl"); xively.addParameter("-k"); xively.addParameter("--request"); xively.addParameter("PUT"); xively.addParameter("--data"); xively.addParameter(dataString); xively.addParameter("--header"); xively.addParameter(apiString); xively.addParameter(url); xively.run(); Serial.println("done!"); // If there's incoming data from the net connection, // send it out the Serial: while (xively.available() > 0) { char c = xively.read(); Serial.write(c); } }