diff --git a/src/datIf.cpp b/src/datIf.cpp
index 25e4365..ea18f4e 100755
--- a/src/datIf.cpp
+++ b/src/datIf.cpp
@@ -6,6 +6,7 @@ History:
 
 */
 #include "datIf.h"
+#include "hwapi.h"
 #include "sendWRcmd.h"
 #include "controlBus.h"
 #include "storeINdata.h"
@@ -513,6 +514,8 @@ char T_datif::loadRecDataFromFrame()
         return 0;
     }
 
+    memset(receivedData, 0x00, sizeof(receivedData));
+
     ret=myDCIF->getReceivedInData(&SlaveAdr, &readSource, &readAddress,  &RdDleng, receivedData);
         // nur true wenn CommandState OK und readState OK
 
@@ -545,6 +548,37 @@ char T_datif::loadRecDataFromFrame()
 
     gpi_storeRecPayLoad(RdDleng, receivedData); //  save for host (user of hwapi)
 
+    if (myDCIF && myDCIF->getSerialPort()) {
+        QVector<uint16_t> &readCmds = myDCIF->getSerialPort()->getReadCmds();
+
+        if (readCmds.size() == 1) {
+            if (readSource == myDCIF->getReadSource() && readSource == readCmds[0]) {
+                if (waitForTestResponse) {
+                    if (readCmds[0] == CMD2DC_TestSerial) {
+                        if (QString(QByteArray((char const *)receivedData, RdDleng)) == "< SlaveResponse") {
+                            waitForTestResponse = false;
+                            ((hwapi *)parent())->dc_autoRequest(true);
+                        }
+                    }
+                }
+                readCmds.clear();
+            } else {
+                qCritical() << __func__ << ":" << __LINE__ << ":" << readSource << myDCIF->getReadSource() << readCmds[0];
+                qCritical() << __func__ << ":" << __LINE__ << ":" << QByteArray((char const *)receivedData, RdDleng).toHex(':');
+                readCmds.clear();
+                return 0;
+            }
+        } else {
+            readCmds.clear();
+            if (parent()) {
+                waitForTestResponse = true;
+                ((hwapi *)parent())->dc_autoRequest(false);
+                ((hwapi *)parent())->dc_requTestResponse();
+            }
+            return 0;
+        }
+    }
+
     // uint8_t nn;
     //qDebug() << "\n datif: got valid data, rdsrc:" << readSource << "  rdadd:" << readAddress
      //        << "  rdlen:" << RdDleng;