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我的终端设备可以根据DEV_NWK_ORPHAN来判断是否掉线。
现在我把终端设备改为路由设备，发现协调器断电之后无法触发DEV_NWK_ORPHAN，请问为什么？
还有路由设备除了自定义心跳来判断协调器是否在线，还有没有其他方法来判断？
谢谢！
