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+/*
+ Wifi Pachube sensor client
+
+ This sketch connects an analog sensor to Pachube (http://www.pachube.com)
+ using an Arduino Wifi shield.
+
+ This example is written for a network using WPA encryption. For
+ WEP or WPA, change the Wifi.begin() call accordingly.
+
+ This example has been updated to use version 2.0 of the Pachube 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
+ * Wifi shield attached to pins 10, 11, 12, 13
+
+ created 13 Mar 2012
+ modified 31 May 2012
+ by Tom Igoe
+ modified 8 Sept 2012
+ by Scott Fitzgerald
+
+ This code is in the public domain.
+
+ */
+#include <SPI.h>
+#include <WiFi.h>
+
+#define APIKEY "YOUR API KEY GOES HERE" // replace your pachube api key here
+#define FEEDID 00000 // replace your feed ID
+#define USERAGENT "My Arduino Project" // user agent is the project name
+
+char ssid[] = "yourNetwork"; // your network SSID (name)
+char pass[] = "secretPassword"; // your network password
+
+int status = WL_IDLE_STATUS;
+
+// initialize the library instance:
+WiFiClient 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(216,52,233,121); // 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() {
+ //Initialize serial and wait for port to open:
+ Serial.begin(9600);
+ while (!Serial) {
+ ; // wait for serial port to connect. Needed for Leonardo only
+ }
+
+ // check for the presence of the shield:
+ if (WiFi.status() == WL_NO_SHIELD) {
+ Serial.println("WiFi shield not present");
+ // don't continue:
+ while(true);
+ }
+
+ // attempt to connect to Wifi network:
+ while ( status != WL_CONNECTED) {
+ Serial.print("Attempting to connect to SSID: ");
+ Serial.println(ssid);
+ // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
+ status = WiFi.begin(ssid, pass);
+
+ // wait 10 seconds for connection:
+ delay(10000);
+ }
+ // you're connected now, so print out the status:
+ printWifiStatus();
+}
+
+
+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:
+ while (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-ApiKey: ");
+ 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;
+}
+
+void printWifiStatus() {
+ // print the SSID of the network you're attached to:
+ Serial.print("SSID: ");
+ Serial.println(WiFi.SSID());
+
+ // print your WiFi shield's IP address:
+ IPAddress ip = WiFi.localIP();
+ Serial.print("IP Address: ");
+ Serial.println(ip);
+
+ // print the received signal strength:
+ long rssi = WiFi.RSSI();
+ Serial.print("signal strength (RSSI):");
+ Serial.print(rssi);
+ Serial.println(" dBm");
+}
+
+
+