/// <summary>
/// Subscribe the specified topic.
/// </summary>
/// <param name="topic">Topic name.</param>
/// <param name="callback">Callback for receiving the subscribed topic messages.</param>
public MqttClientHelper Subscribe(string topic, Action <string, string> callback)
{
mqttClient.ListenTo <String, AsciiPayloadConverter>(topic, (MqttQos)1)
//.ObserveOn(System.Threading.SynchronizationContext.Current)
.Subscribe(msg =>
{
callback(msg.Topic, msg.Payload);
//Console.WriteLine("MQTT {0} : {1}", msg.Topic, msg.Payload);
});
return(this);
}
/// <summary>
/// Subscribes to the specified topic.
/// </summary>
/// <param name="topic">The topic.</param>
/// <param name="qos">The qos.</param>
public void Subscribe(string topic, byte qos)
{
if (client == null)
{
throw new InvalidOperationException("You must connect before you can subscribe to a topic.");
}
var sub = client.ListenTo(topic, (MqttQos)qos)
.ObserveOn(SynchronizationContext.Current)
.Subscribe(msg => ClientMessageArrived(instance, new MqttMessageEventArgs(msg.Topic, msg.Payload)));
topicSubscriptions.Add(topic, sub);
Trace.WriteLine(String.Format("Subscribed to Topic '{0}'.", topic));
if (TopicSubscribed != null)
{
syncContext.Post((data) => this.TopicSubscribed(instance, new TopicSubscribedEventArgs(topic)), null);
}
}