====== MQTT ======
  * http://mqtt.org/
  * [[http://d2.naver.com/helloworld/1846|Facebook 메신저와 MQTT]]
  * [[http://www-01.ibm.com/support/knowledgecenter/SSFKSJ_7.5.0/com.ibm.mm.tc.doc/tc00000_.htm?lang=ko|IBM Knowledge Center]]
  * [[http://www.joinc.co.kr/modules/moniwiki/wiki.php/man/12/MQTT/Tutorial|Joinc: MQTT 소개]]