This code send Air dust value to Ubidots using Wifi shield and Stalker
##Libraries Wifi https://github.com/arduino/wifishield
##Hardware Stalker http://www.seeedstudio.com/wiki/Seeeduino_Stalker_v2.3
Wifi Shield http://arduino.cc/en/Main/ArduinoWiFiShield
Grove Dust Sensor http://www.seeedstudio.com/wiki/Grove_-_Dust_Sensor