BaseSerialPort:

- Flush buffer (DiscardInBuffer) removed as some bytes are missing from time to time.  The IrDA sniffer showed these on the communication line, but they are incompletely received.  Assuming the DiscardInBuffer may be delayed, so the incoming data will be scrapped.

IrdaTransmitProtocol:
- WakeUpMessage marked and debug output

Common/Hardware/WaterMeter/Genesis/GenesisCore/GenesisMeter.cs

@@ -2158,7 +2158,7 @@ namespace Xylem.Common.Hardware.WaterMeter.Genesis.GenesisCore
 
                     while (retryLeft > 0 && !done)
                     {
-                        Thread.Sleep(100);
+                        Thread.Sleep(50);
                         var result = WriteRegister(a.Key.GetIdent(), 1);
                         if (!result)
                         {
@@ -2173,7 +2173,7 @@ namespace Xylem.Common.Hardware.WaterMeter.Genesis.GenesisCore
                         }
 
                         // Wait for storing
-                        Thread.Sleep(500);
+                        Thread.Sleep(400);
                         if (a.Key.AppName == "SENSUSRADIO")
                         {
                             done = true;

Common/Hardware/WaterMeter/Genesis/Protocols/RequestProtocol/RequestProtocol.cs

@@ -330,6 +330,9 @@ namespace Xylem.Common.Hardware.WaterMeter.Genesis.Protocols.RequestProtocol
         /// <remarks date="2019-Jan-22" author="T.Wiedebusch">
         /// - Avoid activation of wakeup retry if record is meanwhile acknowledged.
         /// </remarks>
+        /// <remarks date="2022-Jul-15" author="T.Wiedebusch">
+        /// - Additional delay before retry.
+        /// </remarks>
         public override void DecodeRecord(IPortDataEventArgs data)
         {
             //the request response record covers the entire request protocol
@@ -348,6 +351,7 @@ namespace Xylem.Common.Hardware.WaterMeter.Genesis.Protocols.RequestProtocol
                         _logger.Debug($"{_ident} WakeupMessageRetry(1)");
                         _recordInProcess.WakeupMessageRetryCtr = 1;
                         _recordInProcess.RetryCtr--;
+                        Thread.Sleep(10);
                     }
                 }