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是设备的mqtt的client端要用这个id做验证，还不能传String
这里直接通过id来和数据接在一起，但是在mqtt里面还是变成String类型，方便的话您也可以试一下
我问设备厂家，他们的mqtt协议接受的dstID数据必须是long。。。
@hp 可以帮忙再看看
