MQTT 消息服务器 EMQX简单对接DEMO_emqx 对接demo

下载启动EMQX

EMQ 官方下载地址及部署文档
　选择开源类型 --> 确定版本 --> 下载安装，下载完成后启动emqx

部署完成查看看板

1. 启动后可以通过访问服务端18083端口（http://+服务器ip+:端口号 --> http://192.168.0.1:18083）访问看板页面
   　　　　默认用户名：admin　　
   　　　　默认密码：public
   　　　　相关配置可在\etc\emqx.conf配置文件中修改
   　　文件目录结构
   　　

2. 打开看板登录进看板页，如有需要可将看板语言在设置中修改为中文
   

3. 在功能配置中查看监听器，如下默认监听地址（注:也可在配置文件中查看修改）
   

4. 简单连接EMQ示例

internal class Program
    {
        static MqttClient ConnectMQTT(string broker, int port, string clientId, string username, string password)
        {
            MqttClient client = new MqttClient(broker, port, false, MqttSslProtocols.None, null, null);
            client.Connect(clientId, username, password);
            if (client.IsConnected)
            {
                Console.WriteLine("Connected to MQTT Broker");
            }
            else
            {
                Console.WriteLine("Failed to connect");
            }
            return client;
        }

        static void Publish(MqttClient client, string topic)
        {
            int msg_count = 0;
            while (true)
            {
                System.Threading.Thread.Sleep(1 * 1000);
                string msg = "messages: " + msg_count.ToString();
                client.Publish(topic, System.Text.Encoding.UTF8.GetBytes(msg));
                Console.WriteLine("Send `{0}` to topic `{1}`", msg, topic);
                msg_count++;
            }
        }

        static void Subscribe(MqttClient client, string topic)
        {
            client.MqttMsgPublishReceived += client_MqttMsgPublishReceived;
            client.Subscribe(new string[] { topic }, new byte[] { MqttMsgBase.QOS_LEVEL_AT_MOST_ONCE });
        }
        static void client_MqttMsgPublishReceived(object sender, MqttMsgPublishEventArgs e)
        {
            string payload = System.Text.Encoding.Default.GetString(e.Message);
            Console.WriteLine("Received `{0}` from `{1}` topic", payload, e.Topic.ToString());
        }

        static void Main(string[] args)
        {
            string broker = "本机ip";
            int port = 1883;
            string topic = "Csharp/mqtt";
            string clientId = Guid.NewGuid().ToString();
            string username = "admin";
            string password = "public";
            MqttClient client = ConnectMQTT(broker, port, clientId, username, password);
            Subscribe(client, topic);
            Publish(client, topic);
        }
    }
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如上就配置好EMQ的服务及测试demo程序