/// <summary>
/// Read DLMS Data from the device.
/// </summary>
/// <remarks>
/// If access is denied return null.
/// </remarks>
/// <param name="data">Data to send.</param>
/// <returns>Received data.</returns>
public void ReadDLMSPacket(byte[] data, int tryCount, GXReplyData reply)
{
if (data == null)
{
return;
}
object eop = (byte)0x7E;
//In network connection terminator is not used.
if (client.InterfaceType == InterfaceType.WRAPPER && media is GXNet && !parent.UseRemoteSerial)
{
eop = null;
}
int pos = 0;
bool succeeded = false;
ReceiveParameters <byte[]> p = new ReceiveParameters <byte[]>()
{
AllData = false,
Eop = eop,
Count = 5,
WaitTime = parent.WaitTime * 1000,
};
lock (media.Synchronous)
{
if (data != null)
{
media.Send(data, null);
}
while (!succeeded && pos != 3)
{
succeeded = media.Receive(p);
if (!succeeded)
{
//Try to read again...
if (++pos != tryCount)
{
//If Eop is not set read one byte at time.
if (p.Eop == null)
{
p.Count = 1;
}
System.Diagnostics.Debug.WriteLine("Data send failed. Try to resend " + pos.ToString() + "/3");
media.Send(data, null);
continue;
}
string err = "Failed to receive reply from the device in given time.";
GXLogWriter.WriteLog(err, p.Reply);
throw new Exception(err);
}
}
try
{
//Loop until whole COSEM packet is received.
while (!client.GetData(p.Reply, reply))
{
//If Eop is not set read one byte at time.
if (p.Eop == null)
{
p.Count = 1;
}
if (!media.Receive(p))
{
//Try to read again...
if (++pos != tryCount)
{
System.Diagnostics.Debug.WriteLine("Data send failed. Try to resend " + pos.ToString() + "/3");
continue;
}
string err = "Failed to receive reply from the device in given time.";
GXLogWriter.WriteLog(err, p.Reply);
throw new Exception(err);
}
}
}
catch (Exception ex)
{
GXLogWriter.WriteLog("Received data:", p.Reply);
throw ex;
}
}
GXLogWriter.WriteLog(null, p.Reply);
if (parent.OnTrace != null)
{
parent.OnTrace(parent, "-> " + DateTime.Now.ToLongTimeString(), p.Reply);
}
if (reply.Error != 0)
{
if (reply.Error == (int)ErrorCode.Rejected)
{
Thread.Sleep(1000);
ReadDLMSPacket(data, tryCount, reply);
}
else
{
throw new GXDLMSException(reply.Error);
}
}
}
