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系统topic中有没有设备上线与离线的系统订阅主题？ #436

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xinjiayu opened this issue Oct 25, 2024 · 0 comments

xinjiayu commented Oct 25, 2024 •

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看有系统主题，怎么订阅设备连接与断开连接的topic呢？
例如emqx服务的：
连接：$SYS/brokers/+/clients/+/connected
断开连接：$SYS/brokers/+/clients/+/disconnected

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