一.概述
The attribute protocol allows a device referred to as the server to expose a set
of attributes and their associated values to a peer device referred to as the
client. These attributes exposed by the server can be discovered, read, and
written by a client, and can be indicated and notified by the server
二.架构
三.ATT DATA FORMAT
四.PDU总结
1.PUD ID
2.PDU requst and reponse
蓝牙BLE ATT剖析（一）
原文：http://blog.csdn.net/xiaoxiaopengbo/article/details/51524021
