bluetooth pairing without pin code & awk match

bluetooth pairing without pin code:
http://electronics.stackexchange.com/questions/47273/is-bluetooth-communication-possible-without-pairing

bluetooth基本功能 HCI 執行流程
http://blog.csdn.net/luojianbing1/article/details/6773160

bluetooth基本概念
http://blog.csdn.net/luojianbing1/article/details/6776318#comments

awk match - 更好的搜尋字串:
http://blog.xuite.net/mb1016.flying/linux/28111008-linux+shell+awk+%E8%AA%9E%E6%B3%95
http://stackoverflow.com/questions/10978924/search-a-string-in-shell-script-variable

HCI命令列表:
http://www.lisha.ufsc.br/teaching/ish/ine5346-2003-1/work/bluetooth/hci_commands.html