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终端使用的是纽扣电池，终端入网后进入pm3，使用了nv,当终端掉网或者电池没电导致掉线等情况，协调器如何才能获取此类情况的状态？网络内没有路由。谢谢。
可使用child aging功能，协议栈内已实现。请下载最新协议栈
