【MQTT】.Net Core 操作

1、安装M2MQTT

注：.Net Core 项目是安装M2MqttDotnetCore

2、建立连接/订阅/发送消息

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using uPLibrary.Networking.M2Mqtt;
using uPLibrary.Networking.M2Mqtt.Messages;

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {

            MqttClient client = new MqttClient("IPAddress"); 

            // 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,"UserName","Password");

            //// 订阅主题"/home/temperature" 消息质量为 2 
            client.Subscribe(new string[] { "/WorldTest" }, new byte[] { MqttMsgBase.QOS_LEVEL_EXACTLY_ONCE });


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

            Console.ReadLine();
        }

        static void client_MqttMsgPublishReceived(object sender, MqttMsgPublishEventArgs e)
        {
            //处理接收到的消息
            string msg = System.Text.Encoding.Default.GetString(e.Message);
            Console.WriteLine("收到消息:" + msg + "\r\n");
        }
    }
}

3、参考文献

https://github.com/mohaqeq/paho.mqtt.m2mqtt

https://blog.csdn.net/Leytton/article/details/51896738