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+/*
+ 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.
+
+ This example has been updated to use version 2.0 of the Pachube.com API.
+ To make it work, create a feed with a datastream, and give it the ID
+ sensor1. Or change the code below to match your feed.
+
+
+ Circuit:
+ * Analog sensor attached to analog in 0
+ * Ethernet shield attached to pins 10, 11, 12, 13
+
+ created 15 March 2010
+ modified 9 Apr 2012
+ by Tom Igoe with input from Usman Haque and Joe Saavedra
+
+http://arduino.cc/en/Tutorial/PachubeClient
+ This code is in the public domain.
+
+ */
+
+#include <SPI.h>
+#include <Ethernet.h>
+
+#define APIKEY "YOUR API KEY GOES HERE" // replace your pachube api key here
+#define FEEDID 00000 // replace your feed ID
+#define USERAGENT "My Project" // user agent is the project name
+
+// assign a MAC address for the ethernet controller.
+// Newer Ethernet shields have a MAC address printed on a sticker on the shield
+// 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;
+
+// if you don't want to use DNS (and reduce your sketch size)
+// use the numeric IP instead of the name for the server:
+IPAddress server(216,52,233,122); // numeric IP for api.pachube.com
+//char server[] = "api.pachube.com"; // name address for pachube API
+
+unsigned 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 unsigned long postingInterval = 10*1000; //delay between updates to Pachube.com
+
+void setup() {
+ // Open serial communications and wait for port to open:
+ Serial.begin(9600);
+ while (!Serial) {
+ ; // wait for serial port to connect. Needed for Leonardo only
+ }
+
+
+ // start the Ethernet connection:
+ if (Ethernet.begin(mac) == 0) {
+ Serial.println("Failed to configure Ethernet using DHCP");
+ // DHCP failed, so use a fixed IP address:
+ Ethernet.begin(mac, ip);
+ }
+}
+
+void loop() {
+ // read the analog sensor:
+ int sensorReading = analogRead(A0);
+
+ // 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(server, 80)) {
+ Serial.println("connecting...");
+ // send the HTTP PUT request:
+ client.print("PUT /v2/feeds/");
+ client.print(FEEDID);
+ client.println(".csv HTTP/1.1");
+ client.println("Host: api.pachube.com");
+ client.print("X-PachubeApiKey: ");
+ client.println(APIKEY);
+ client.print("User-Agent: ");
+ client.println(USERAGENT);
+ client.print("Content-Length: ");
+
+ // calculate the length of the sensor reading in bytes:
+ // 8 bytes for "sensor1," + number of digits of the data:
+ int thisLength = 8 + getLength(thisData);
+ client.println(thisLength);
+
+ // last pieces of the HTTP PUT request:
+ client.println("Content-Type: text/csv");
+ client.println("Connection: close");
+ client.println();
+
+ // here's the actual content of the PUT request:
+ client.print("sensor1,");
+ client.println(thisData);
+
+ }
+ else {
+ // if you couldn't make a connection:
+ Serial.println("connection failed");
+ Serial.println();
+ Serial.println("disconnecting.");
+ client.stop();
+ }
+ // note the time that the connection was made or attempted:
+ lastConnectionTime = millis();
+}
+
+
+// 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;
+}
+