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mqtt-spy is an open source utility intended to help you with monitoring activity on MQTT topics. It’s been designed to deal with high volumes of messages, as well as occasional publications.
mqtt-spy is a JavaFX application, so in theory should work on any operating system with an appropriate version of Java 8 installed.4.退出编辑并连接服务端
5.创建消息订阅者
6.发布消息
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