+MQTTSUBRECV:0,"/sys/a1Y6Vk1Ir4p/LED1/thing/service/property/set",100,{"method":"thing.service.property.set","id":"631261441","params":{"powerstate":1},"version":"1.0.0"} 1 D/ M H, R" E& i$ B1 p. A$ E( h4 Y3 [9 J% ?: l( Z
在c语言中怎么提取出来8 W1 I( J1 A. q* I' A
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