while(true) {try{if(!awaitclient.TryPingAsync()) {awaitclient.ConnectAsync(mqttClientOptions, CancellationToken.None);varmqttSubscribeOptions =newMqttFactory().CreateSubscribeOptionsBuilder() .WithTopicFilter( f => { f.WithTopic("shi");//订阅主题}) .Build();awaitclient.SubscribeAsync(mqttSubscribeOptions); } }catch{// 错误}finally{// 每5秒检查一...
只需使用 MQTT 客户端的 PublishAsync 方法建立连接并开始发送和接收消息。 var connectResult = await mqttClient.ConnectAsync(options); 这里我们使用异步编程,在订阅的同时允许消息发布,防止阻塞。 6. 订阅话题 连接到代理后,可以通过检查 ResultCode 的值来验证连接是否成功。如果连接成功,可以订阅主题来接收消息...
如果超过了服务器的限制,可能会导致PublishAsync方法抛出异常。可以检查服务器的限制,并确保在使用PublishAsync方法时不会超过这些限制。 总之,当使用MQTTnet的PublishAsync方法时,如果出现异常,需要仔细检查网络连接、认证信息、主题、QoS级别和服务器限制等方面的问题,以找到并解决异常的原因。 相关搜索: MQTTNET连接 ...
My credentials are correct as I can connect via OpenSLL. public async Task ConnectAsync() { var caCertificate = new X509Certificate2("cacert.pem"); var cclient = X509Certificate2.CreateFromPemFile("client.pem","clientkey.pem"); string clientId = "Account-XXXXXXXX-XXXX-XXXX-XXXX-XXX...
private static async Task ConnectMqttServerAsync() { if (mqttClient == null) { mqttClient = new MqttFactory().CreateMqttClient(); mqttClient.UseConnectedHandler(async handle => { var result = await mqttClient.SubscribeAsync(new TopicFilter() { Topic = topicSubscribe, QualityOfServiceLevel =...
具体连接时需要用到的属性,ID的名称,要连接Server的名称,接入时用到的账号和密码,掉线时是否重新清除原有名称,还有许多…usingMQTTnet.Packets; //这个没用上usingMQTTnet.Protocol; //这个也没用上usingMQTTnet.Client.Receiving; //接收usingMQTTnet.Client.Disconnecting; //断线using MQTTnet.Client.Connecting;...
一段时间后重试连接 await _mqttClient.ConnectAsync(options); }); try { await _mqttClient.ConnectAsync(options); } catch (Exception ex) { Console.WriteLine($"Exception: {ex}"); } // 阻塞主线程,以便观察重连行为 Console.ReadLine(); // 断开连接前清理资源 await _mqttClient.DisconnectAsync();...
using MQTTnet.Client.Connecting; //连接 新建一个类:先写一下变量和一些字段 class HOSMQTT { private static MqttClient mqttClient = null; private static IMqttClientOptions options = null; private static bool runState = false; private static bool running = false; ...
await mqttClient.DisconnectAsync(); Complete Code The following code shows how to connect to the server, subscribe to topics, and publish and receive messages. For a complete demonstration of all functions, see the project's GitHub repository. using System.Security.Authentication; using System.Sec...
SubscribeAsync(builder.Build()).GetAwaiter().GetResult(); } 代码语言:javascript 代码运行次数:0 运行 AI代码解释 client.UseConnectedHandler(args=> { Console.WriteLine("本客户端已连接成功"); Console.WriteLine($"地址:{model.IP}"); Console.WriteLine($"端口:{model.Port}"); Console.WriteLine($...