public void MQTTPublishMessage(string topic, byte[] payload)
{
topic = topic.Replace("//", "/");
var message = new MqttApplicationMessageBuilder()
.WithTopic(topic)
.WithPayload(payload)
.WithExactlyOnceQoS()
.WithRetainFlag()
.Build();
Debug.Log("newClient publishes message: " + topic);
client.PublishAsync(message);
currentlyProcessingMessages.Add(message.GetHashCode());
}
