2.3. 消息类型¶

通信消息有两种类型： Request 和 Response。他们分别是通过BL的 Write 和 Notification Characteristic 来传输。

具体关系如下表：

消息类型	方向	Write Characteristic	Indication Characteristic
Request	网关 -> 手环	Y
Response	网关 <- 手环		Y

2.3.1. 向手环发送命令¶

!pragma teoz true
participant 网关 as P #cyan
box 手环 #LightBlue
box BLE Core
participant Write as W #khaki
participant Indication as I #lightgreen
end box
participant Application as M #deepskyblue
end box

autonumber
...
note over P,I: BLE已连接
P ->(10) W : Request( timeout, ...)
W -> M :
M -> I :
P (10)<- I : Response( error， result )