gistfile1.ino

// Libraries
#include <Adafruit_CC3000.h>
#include <ccspi.h>
#include <SPI.h>
#include <avr/wdt.h>

// Define CC3000 chip pins
#define ADAFRUIT_CC3000_IRQ   3
#define ADAFRUIT_CC3000_VBAT  5
#define ADAFRUIT_CC3000_CS    10

// LM35 sensor pin
#define SENSOR_PIN 0

// Create CC3000 instances
Adafruit_CC3000 cc3000 = Adafruit_CC3000(ADAFRUIT_CC3000_CS, ADAFRUIT_CC3000_IRQ, ADAFRUIT_CC3000_VBAT,
                                         SPI_CLOCK_DIV2); // you can change this clock speed
                                         


// WLAN parameters
#define WLAN_SSID       SSID
#define WLAN_PASS       PASSWORD NG WIFI
#define WLAN_SECURITY   WLAN_SEC_WPA2

// Database Parameters
#define WEBSITE  "Link ng Database"
#define feedID  "Device Number"

uint32_t ip;

void setup(void)
{
  // Initialize
  Serial.begin(115200);
  
  Serial.println(F("Initializing WiFi chip..."));
  if (!cc3000.begin())
  {
    Serial.println(F("Couldn't begin()! Check your wiring?"));
    while(1);
  }
 
}

void loop(void)
{
  // Connect to WiFi network
  cc3000.connectToAP(WLAN_SSID, WLAN_PASS, WLAN_SECURITY);
  Serial.println(F("Connected to WiFi network!"));
  
  /* Wait for DHCP to complete */
  Serial.println(F("Request DHCP"));
  while (!cc3000.checkDHCP())
  {
    delay(100);
  }
  
  // Start watchdog 
  wdt_enable(WDTO_8S);  

  ip = 0;
  // Try looking up the website's IP address
  while (ip == 0) {
    if (! cc3000.getHostByName(WEBSITE, &ip)) {
      Serial.println(F("Couldn't resolve!"));
    }
    delay(500);
  }

  float temperature = readTemperature();

  Serial.print("Temp -> ");  
  Serial.println(temperature);
  
  // Prepare JSON for Xively & get length
  int length = 0;

  // JSON beginning
  String data_start = "";
  data_start = data_start + "\n" + "{\"version\":\"1.0.0\",\"datastreams\" : [ ";
  
  // JSON for temperature & humidity
  String data_temperature = "{\"id\" : \"Temperature\",\"current_value\" : \"" + String(temperature) + "\"}]}";
  
  // Get length
  length = data_start.length() + data_temperature.length();
 
  // Reset watchdog
  wdt_reset();
 
  // Send request
  Adafruit_CC3000_Client client = cc3000.connectTCP(ip, 80);
  if (client.connected()) {
    Serial.println(F("Connected to Xively server."));
    
    // Send headers
    Serial.print(F("Sending headers"));
    client.fastrprint(F("PUT /v2/feeds/"));
    client.fastrprint(feedID);
    client.fastrprintln(F(".json HTTP/1.0"));
    Serial.print(F("."));
    client.fastrprintln(F("Host: api.xively.com"));
    Serial.print(F("."));
    client.fastrprint(F("X-ApiKey: "));
    client.fastrprintln(API_key);
    Serial.print(F("."));
    client.fastrprint(F("Content-Length: "));
    client.println(length);
    Serial.print(F("."));
    client.fastrprint(F("Connection: close"));
    Serial.println(F(" done."));
    
    // Reset watchdog
    wdt_reset();
    
    // Send data
    Serial.print(F("Sending data"));
    client.fastrprintln(F(""));    
    client.print(data_start);
    Serial.print(F("."));
    wdt_reset();
    client.print(data_temperature);
    Serial.print(F("."));
    wdt_reset();
    client.fastrprintln(F(""));
    Serial.println(F(" done."));

    // Reset watchdog
    wdt_reset();
    
  } else {
    Serial.println(F("Connection failed"));    
    return;
  }
  
  // Reset watchdog
  wdt_reset();
  
  Serial.println(F("Reading answer..."));
  while (client.connected()) {
    while (client.available()) {
      char c = client.read();
      Serial.print(c);
    }
  }
  
  // Reset watchdog
  wdt_reset();
   
  // Close connection and disconnect
  client.close();
  Serial.println(F("Disconnecting"));
  Serial.println(F(""));
  cc3000.disconnect();
  
  // Reset watchdog & disable
  wdt_reset();
  wdt_disable();
  
  // Wait 10 seconds until next update
  delay(10000);
  
}

// get temperature from LM35
float readTemperature(void) 
{
  int reading = analogRead(SENSOR_PIN); 
  float voltage= reading * 5 / 1024.0;
  float temperatureC = (voltage - 0.5) * 100 ;
  return temperatureC;
}