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