MQTT协议 C#客户端

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1、引入M2MQTT的dll库文件

点击此处下载 M2Mqtt.Net.dll

2、建立客户端连接并订阅

//创建客户端实例MqttClient client = new MqttClient(IPAddress.Parse(MQTT_BROKER_ADDRESS)); //主机为IP时MqttClient client = new MqttClient(MQTT_BROKER_ADDRESS); //当主机地址为域名时// 注册消息接收处理事件，还可以注册消息订阅成功、取消订阅成功、与服务器断开等事件处理函数client.MqttMsgPublishReceived += client_MqttMsgPublishReceived; //生成客户端ID并连接服务器string clientId = Guid.NewGuid().ToString(); client.Connect(clientId); // 订阅主题"/home/temperature" 消息质量为 2 client.Subscribe(new string[] { "/home/temperature" }, new byte[] { MqttMsgBase.QOS_LEVEL_EXACTLY_ONCE }); ... void client_MqttMsgPublishReceived(object sender, MqttMsgPublishEventArgs e) { //处理接收到的消息string msg = System.Text.Encoding.Default.GetString(e.Message);        textBox1.AppendText("收到消息:" + msg + "\r\n");}

3、发布消息

// 发布消息到主题 "/home/temperature" 消息质量为 2,不保留 client.Publish("/home/temperature", Encoding.UTF8.GetBytes("hello"), MqttMsgBase.QOS_LEVEL_EXACTLY_ONCE, false);

4、参考文献

https://github.com/mqtt/mqtt.github.io/wiki/libraries

https://github.com/leytton/m2mqtt (防丢fork)

【转载请注明出处:http://blog.csdn.net/leytton/article/details/51896738】

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