diff --git a/sketches/TestSerial/TestSerial.h b/sketches/TestSerial/TestSerial.h
index 32a8a2c221d37e0b5c3730c94f524c636d03acbe..d7e8d902ca0427cb99fc1ecdfb8fb39ea8fe8d2d 100644
--- a/sketches/TestSerial/TestSerial.h
+++ b/sketches/TestSerial/TestSerial.h
@@ -19,7 +19,7 @@
 #include "nRF52840SerE.h"
 #include "ComRingBuf.h"
 
-#define TmpVerMsg "Version 20230923-10 "
+#define TmpVerMsg "Version 20230925-4 "
 
 #ifdef DebugTerminal
 // ****************************************************************************
@@ -36,6 +36,7 @@ void smPutCharRB();
 void smReadPtrRB();
 void smGetCntIntSer();
 void smReadAllRB();
+void smWriteStrRB();
 #endif
 
 
diff --git a/sketches/TestSerial/TestSerial.ino b/sketches/TestSerial/TestSerial.ino
index 57eb0a0bac893542efcf3b734c62768fba3350c4..ec5194b4cbab2ce5c0fc933c883522b6e7b85f03 100644
--- a/sketches/TestSerial/TestSerial.ino
+++ b/sketches/TestSerial/TestSerial.ino
@@ -303,6 +303,7 @@ char *smCheckRBHelp =
     "B   Zeichen in P2 eingeben\r\n"
     "I   Anzahl der Interrupts anzeigen\r\n"
     "R   Inhalte der Empfangspuffer auslesen\r\n"
+    "Sx  String in Px eingeben\r\n"
     "Z   Zeiger/Index der Ringpuffer anzeigen\r\n"
 };
 
@@ -340,6 +341,11 @@ void smCheckRB()
     sm.userVar = 1;
     sm.enter(smReadAllRB);
   }
+  else if(mon.lastKeyIn == 'S' || mon.lastKeyIn == 's')
+  {
+    sm.userVar = 0;
+    sm.enter(smWriteStrRB);
+  }
   else if(mon.lastKeyIn == 'Z' || mon.lastKeyIn == 'z')
   {
     sm.userVar = 1;
@@ -454,5 +460,48 @@ void smReadAllRB()
     sm.userVar++;
 }
 
+char smWrStNr;
+
+void smWriteStrRB()
+{
+  if(sm.firstEnter())
+  {
+    mon.print((char *) "String (Endezeichen TAB) eingeben für Puffer ");
+  }
+
+  if(mon.lastKeyIn == ':') return;
+
+  if(sm.userVar < 1)
+  {
+    if(mon.lastKeyIn < '1' || mon.lastKeyIn > '2') return;
+    smWrStNr = mon.lastKeyIn;
+    mon.cprint(smWrStNr);
+    mon.cprint(':');
+    mon.cprint(' ');
+    sm.userVar++;
+    mon.lastKeyIn = ':';
+    return;
+  }
+
+  if(mon.lastKeyIn != '\t')
+  {
+    tmpCharBuf[sm.userVar - 1] = mon.lastKeyIn;
+    mon.cprint(mon.lastKeyIn);
+    sm.userVar++;
+    mon.lastKeyIn = ':';
+    return;
+  }
+
+  tmpCharBuf[sm.userVar - 1] = '\0';
+  if(smWrStNr == '1')
+    crb1.putStr((char *) tmpCharBuf);
+  else if(smWrStNr == '2')
+    crb2.putStr((char *) tmpCharBuf);
+  mon.println();
+  mon.lastKeyIn = ':';
+  sm.enter(smCheckRB);
+}
+
+
 #endif // DebugTerminal