read_cosm.ino

#include <SPI.h>
#include <Ethernet.h>
#include <HttpClient.h>
#include <Cosm.h>

#define API_KEY "YOURAPIKEY" // your Cosm API key
#define FEED_ID YOURFEEDID // your Cosm feed ID

// MAC address for your Ethernet shield
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };

// Analog pin which we're monitoring (0 and 1 are used by the Ethernet shield)
int sensorPin = 2;

unsigned long lastConnectionTime = 0;                // last time we connected to Cosm
const unsigned long connectionInterval = 15000;      // delay between connecting to Cosm in milliseconds

EthernetClient client;
CosmClient cosmclient(client);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  Serial.println("Cosm Sensor Client Example");
  Serial.println("==========================");

  Serial.println("Initializing network");
  while (Ethernet.begin(mac) != 1) {
    Serial.println("Error getting IP address via DHCP, trying again...");
    delay(15000);
  }

  Serial.println("Network initialized");
  Serial.println();
}

void loop() {
  // main program loop
  if (millis() - lastConnectionTime > connectionInterval) {
    // read data from Cosm
    getData();
    // update connection time so we wait before connecting again
    lastConnectionTime = millis();
  }
}

// get the value of the datastream from Cosm, then use this data somehow
void getData() {
  Serial.println("Reading data from Cosm");

  int ret = cosmclient.get(feed, API_KEY);
  Serial.print("GET return code: ");
  Serial.println(ret);

  if (ret > 0) {
    Serial.print("Datastream is: ");
    Serial.println(feed[0]);

    Serial.print("Sensor value is: ");
    Serial.println(feed[0].getFloat());
  }

  Serial.println();
}