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请教，zstack mesh 1.0.0 成功组网后，协调器断电，终端自动加入路由器为其父节点，此时继续向协调器发送信息，终端自身是否能知道协调器已经不在线了，这样它就可以选择是否继续发送信息，如何判断协调器是否在线？
终端可以定时发送MAC地址请求，连续很多次都失败的话就证明协调器不在网络当中了
