Connecting Your Arduino to the Internet - Exploring Arduino: Tools and Techniques for Engineering Wizardry - page 334

Listing 14-3: Xively Datastream Upload—xively.ino
#include <SPI.h>
#include <Ethernet.h>
#include <HttpClient.h>
#include <Xively.h>
// MAC address for your Ethernet shield
byte mac[] = { 0x90, 0xA2, 0xDA, 0x00, 0x4A, 0xE0 };
// Your Xively key to let you upload data
char xivelyKey[] = "qkjXS1oUKqbCG-hqh3fw4WIsdvOSAKx4ZXZYSWhGUWdxcz0g";
// Analog pin which we're monitoring (0 and 1 are used by the
// Ethernet shield)
int sensorPin = 2;
// Define the strings for our datastream IDs
char sensorId[] = "sensor_reading";
XivelyDatastream datastreams[] = {
XivelyDatastream(sensorId, strlen(sensorId), DATASTREAM_FLOAT),
};
// Finally, wrap the datastreams into a feed
XivelyFeed feed(1242622121, datastreams, 1 /* number of datastreams */);
EthernetClient client;
XivelyClient xivelyclient(client);
void setup() {
// Put your setup code here, to run once:
Serial.begin(9600);
Serial.println("Starting single datastream upload to Xively...");
Serial.println();
while (Ethernet.begin(mac) != 1)
{
Serial.println("Error getting IP address via DHCP, trying again...");
delay(15000);
}
}
void loop() {
int sensorValue = analogRead(sensorPin);
datastreams[0].setFloat(sensorValue);
Serial.print("Read sensor value ");
Serial.println(datastreams[0].getFloat());
Serial.println("Uploading it to Xively");
int ret = xivelyclient.put(feed, xivelyKey);