diff --git a/src/datIf.cpp b/src/datIf.cpp
index 9b30965..25e4365 100755
--- a/src/datIf.cpp
+++ b/src/datIf.cpp
@@ -400,7 +400,7 @@ char T_datif::sendINrequestsAutomatic(void)
     uint8_t datif_maxNrCommands=35, datif_sendNow;
 
     // send quicker while transaction is ongoing:
-    uint8_t datif_vendRequCommandList[15]={102,107,108,110,112,115,116,31,32,40,41,42,23,0,0};
+    uint8_t datif_vendRequCommandList[15]={102,107,108,110,112,115,116,30,31,32,40,41,42,23,0};
     uint8_t datif_maxVendingCmds=13;
 
     // special commands:
@@ -1012,18 +1012,24 @@ char T_datif::loadRecDataFromFrame()
         uit2=uchar2uint(receivedData[7],receivedData[6]);  //  value of last coin
         //if (uitmp>0) // nur 1x bei neuer Münze  6.10.23 aendern:
                         // beim Wechsler hat die kleinste Muenze immer coin type 0!
+
         if (uitmp>10000 || uit2>10000)
         {
             uitmp=0;
             uit2=0;
         }
-        if ((newInsertedAmount != lastInsertedAmount) || uit2>0 )
-        {
-            gpi_storeCurrentPayment(newInsertedAmount, uitmp, uit2);
-            emit datif_gotNewCoin();    // OR BILL  if (uitmp & 0x8000)>0
-            //qDebug()<<"emit new coin";
-            lastInsertedAmount=newInsertedAmount;
-            //qCritical()<<"datif 112 store and emit new coin "<<newInsertedAmount<<" "<<uitmp<<" "<<uit2;
+
+        if (uit2==3 || uit2==5 || uit2==10 || uit2==20 || uit2==50 || uit2==100 || uit2==200 || uit2==500)
+         {
+            // valid coin
+            if ((newInsertedAmount != lastInsertedAmount) || uit2>0 )
+            {
+                gpi_storeCurrentPayment(newInsertedAmount, uitmp, uit2);
+                emit datif_gotNewCoin();    // OR BILL  if (uitmp & 0x8000)>0
+                //qDebug()<<"emit new coin";
+                lastInsertedAmount=newInsertedAmount;
+                //qCritical()<<"datif 112 store and emit new coin "<<newInsertedAmount<<" "<<uitmp<<" "<<uit2;
+            }
         }
 
         break;