[IEEE 2014 IEEE International Conference on Internet of Things(iThings), and IEEE Green Computing and Communications (GreenCom) and IEEE Cyber, Physical and Social Computing(CPSCom) - Taipei, Taiwan (2014.9.1-2014.9.3)] 2014 IEEE International Conference on Internet of Things(iThings), and IEEE Green Computing and Communications (GreenCom) and IEEE Cyber, Physical and Social Computing (CPSCom) - Greendicator: Enabling Optical Pulse-Encoded Data Output from WSN for Display on Smartphones