目前常见的订阅方法：1、基于设备端sdk或者开源的mqtt的subscribe订阅方法。2、设备模拟器里面直接订阅，如附件截图所示。 3、用mqtt.fx模拟设备端进行订阅。可以请参考：https://developer.aliyun.com/article/753229?groupCode=te...

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