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这个是映射字段用的,设备配置上有一个采集周期是用来控制上数频率的
我这里没找到这个采集周期
mqtt驱动不能配置采集周期,服务器那边往主题上推送了数据,我们这边就会接收到数据,想设置的话,需要在mqtt服务器那边控制发送报文的时间