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
