private static void SubscribeExcample() { // Setup and start a rx MQTT client. var options = new ManagedMqttClientOptionsBuilder() .WithAutoReconnectDelay(TimeSpan.FromSeconds(5)) .WithClientOptions(new MqttClientOptionsBuilder() .WithClientId("Client1") .WithTcpServer("127.0.0.1") .Build()) .Build(); using var mqttClient = new MqttFactory().CreateRxMqttClient(); _ = mqttClient.StartAsync(options); const string topic = "MyTopic/#"; mqttClient.Connect(topic) .Select(message => new { message.ApplicationMessage.Topic, Payload = message.ApplicationMessage.Payload.ToUTF8String() }) .Subscribe(message => Console.WriteLine($"@{message.Topic}: {message.Payload}")); WaitForExit($"Subscribed to {topic}."); }