public static void Write(this KnxNetIpClient client, KnxLogicalAddress destination, DatapointType data, MessagePriority priority = MessagePriority.Auto)
{
var message = new KnxMessage
{
MessageCode = MessageCode.Request,
MessageType = MessageType.Write,
SourceAddress = client.DeviceAddress,
DestinationAddress = destination,
Payload = data.Payload,
Priority = priority,
};
client.SendMessage(message);
}
public static void Reply(this KnxNetIpClient client, IKnxMessage replyTo, DatapointType data, MessagePriority priority = MessagePriority.Auto)
{
var request = replyTo;
var message = new KnxMessage
{
MessageCode = MessageCode.Confirmation,
MessageType = replyTo.MessageType,
SourceAddress = client.DeviceAddress,
DestinationAddress = request.SourceAddress,
Payload = data.Payload,
Priority = priority,
};
client.SendMessage(message);
}
public static DatapointType Read(this KnxNetIpClient client, Type datapointTypeResultType, KnxLogicalAddress destination, MessagePriority priority = MessagePriority.Auto, TimeSpan timeOut = default)
{
var replyEvent = new AutoResetEvent(false);
var indicationPayload = new byte[] { };
var confirmationPayload = new byte[] { };
var indicationMessage = default(IKnxMessage);
var confirmationMessage = default(IKnxMessage);
if (timeOut.TotalMilliseconds <= 0)
{
timeOut = client.Configuration.ReadTimeout;
}
try
{
// specify the reply condition
void KnxMessageReceived(object sender, IKnxMessage knxMessage)
{
if (knxMessage.DestinationAddress.ToString() != destination.ToString())
{
return;
}
var indicationCondition = (knxMessage.MessageCode == MessageCode.Indication) && (knxMessage.MessageType == MessageType.Reply);
var confirmationCondition = knxMessage.MessageCode == MessageCode.Confirmation;
// If we receive a confirmation, we cannot be sure that the payload correspond to the current actor value
if (confirmationCondition)
{
confirmationMessage = knxMessage;
confirmationPayload = new byte[knxMessage.PayloadLength];
knxMessage.Payload.CopyTo(confirmationPayload, 0);
}
// but, if we receive an indication, we can be sure, that the payload is the current actor value
if (indicationCondition)
{
indicationMessage = knxMessage;
indicationPayload = new byte[knxMessage.PayloadLength];
knxMessage.Payload.CopyTo(indicationPayload, 0);
replyEvent.Set();
}
}
client.KnxMessageReceived += KnxMessageReceived;
try
{
// create and send the read request
var message = new KnxMessage
{
MessageCode = MessageCode.Request,
MessageType = MessageType.Read,
SourceAddress = client.DeviceAddress,
DestinationAddress = destination,
Priority = priority
};
Debug.WriteLine("{0} START READING from {1}", DateTime.Now.ToLongTimeString(), destination);
client.SendMessage(message);
if (replyEvent.WaitOne(timeOut) && indicationMessage != null)
{
return((DatapointType)Activator.CreateInstance(datapointTypeResultType, indicationPayload));
}
else
{
// Fallback, if we retrieved a confirmation, but no indication.
if (confirmationMessage != null)
{
return((DatapointType)Activator.CreateInstance(datapointTypeResultType, confirmationPayload));
}
throw new KnxTimeoutException(string.Format("Did not retrieve an answer within configured timeout of {0} seconds: {1}", timeOut.TotalSeconds, message));
}
}
finally
{
client.KnxMessageReceived -= KnxMessageReceived;
Debug.WriteLine("{0} STOPPED READING of {1}", DateTime.Now.ToLongTimeString(), destination);
}
}
finally
{
replyEvent.Dispose();
}
}