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现象终端无法收到协调器数据，抓包分析看见终端在向协调器请求数据，但是没有发现协调器向终端发送数据，只看见协调器在发出找终端的帧。这是为什么呢？
等了大概5-6分钟的样子又恢复正常！ 下面是我的抓包数据
