onMessageOut (event)

Fired when an outgoing message has been sent and/or fully acknowledged.

Syntax

- (void)onMessageOut:(int)packetId :(NSString*)topic :(int)QOS :(NSData*)message :(BOOL)retained :(BOOL)duplicate;
func onMessageOut(_ packetId: Int32, _ topic: String, _ QOS: Int32, _ message: Data, _ retained: Bool, _ duplicate: Bool)

Remarks

The MessageOut event fires once for each outgoing message either immediately after it is sent (QoS 0), or after it has been fully acknowledged by the receiver (QoS 1 and 2).

  • PacketId: The message packet Id. This will always be -1 if QOS is 0.
  • Topic: The message's topic string.
  • QOS: The message's QoS level.
  • Message: The message data.
  • Retained: Whether or not this message was sent with the "Retain" flag set.
  • Duplicate: Whether or not this message was sent with the "Duplicate" flag set.

Refer to MessageAck for more information about QoS 1 and 2 message processing steps.


// MessageOut event handler.
mqtt1.OnMessageOut += (s, e) => {
  Console.WriteLine("Send message to topic '" + e.Topic + "' with QoS " + e.QOS + ":");
  Console.WriteLine(e.Message);
};
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IPWorks IoT 2020 iOS Edition - Version 20.0 [Build 8265]