diff --git a/src/download_thread.cpp b/src/download_thread.cpp
index 2f6c603..5f430bb 100644
--- a/src/download_thread.cpp
+++ b/src/download_thread.cpp
@@ -104,10 +104,11 @@ void DownloadThread::run() {
 
     m_hw->dcDownloadRequestAck();
 
-    qCritical() << "DownloadThread::run(): DOWNLOAD THREAD STARTED:";
-    qCritical() << "               DownloadThread::run(): Filename:" << m_hw->dcDownloadFileName();
+    qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+                << "DownloadThread::run(): DOWNLOAD THREAD STARTED:";
+    qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+                << "               DownloadThread::run(): Filename:" << m_hw->dcDownloadFileName();
 
-#if 1
     // load binary device controller file into memory
     QByteArray ba = loadBinaryDCFile(m_hw->dcDownloadFileName());
     if (ba.size() > 0) {
@@ -117,15 +118,29 @@ void DownloadThread::run() {
         // fill last block of data to be sent with 0xFF
         ba = ba.leftJustified(totalBlocks*64, (char)(0xFF));
 
-        qCritical() << "DownloadThread::run(): TOTAL NUMBER OF BYTES TO SEND TO DC" << ba.size();
-        qCritical() << "DownloadThread::run(): TOTAL NUMBER OF BLOCKS" << totalBlocks;
+        qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+                    << "DownloadThread::run(): TOTAL NUMBER OF BYTES TO SEND TO DC" << ba.size();
+        qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+                    << "DownloadThread::run(): TOTAL NUMBER OF BLOCKS" << totalBlocks;
 
         m_hw->dc_autoRequest(true); // turn auto-request setting on
 
-        resetDeviceController();
+        m_hw->request_DC2_HWversion();
+        m_hw->request_DC2_SWversion();
         QThread::sleep(1);
+
+        resetDeviceController();
+
+        qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+                    << "DownloadThread::run(): RESET DEVICE-CONTROLLER";
+        QThread::sleep(1);
+
         if (startBootloader()) {
+            qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+                        << "DownloadThread::run(): STARTED BOOT-LOADER";
+
             m_hw->dc_autoRequest(false);// turn auto-request setting off for
+                                        // download of binary dc
 #if 0
             int currentBlock = 0;       // download of binary dc
             DownloadResult res = DownloadResult::OK;
@@ -160,34 +175,26 @@ void DownloadThread::run() {
                 // QThread::msleep(250);
             }
             qCritical() << "DownloadThread::run(): last result" << (int)sendStatus(m_hw->bl_wasSendingDataOK());
+#else
+            for (uint16_t currentBlock = 0; currentBlock <= totalBlocks; ++currentBlock) {
+                m_hw->dcDownloadSetCurrentBlockNumber(currentBlock);
+                qCritical() << "DownloadThread::run(): currentBlockNumber" << currentBlock;
+                QThread::msleep(250);
+            }
 #endif
             m_hw->dc_autoRequest(true); // turn auto-request setting on again
         }
         stopBootloader();   // there is no harm in stopping the bootloader even
-    }                       // if it was not started at all
-
-#else
-    // load binary device controller file into memory
-    QByteArray ba = loadBinaryDCFile(m_hw->dcDownloadFileName());
-    if (ba.size() > 0) {
-        uint16_t const totalBlocks = (((ba.size())%64)==0) ? (ba.size()/64) : (ba.size()/64)+1;
-        m_hw->dcDownloadSetTotalBlockNumber(totalBlocks);
-
-        // fill last block of data to be sent with 0xFF
-        ba = ba.leftJustified(totalBlocks*64, (char)(0xFF));
-
-        for (uint16_t currentBlock = 0; currentBlock <= totalBlocks; ++currentBlock) {
-            m_hw->dcDownloadSetCurrentBlockNumber(currentBlock);
-            qCritical() << "DownloadThread::run(): currentBlockNumber" << currentBlock;
-            QThread::msleep(250);
-        }
+                            // if it was not started at all
+        qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+                    << "DownloadThread::run(): STOPPED BOOT-LOADER";
     }
-#endif
 
     m_hw->dcDownloadSetRunning(false);
     m_hw->dcDownloadSetFinished(true);
 
-    qCritical() << QDateTime::currentDateTime().toString(Qt::ISODate) + "DOWNLOAD THREAD FINISHED";
+    qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+                << "DOWNLOAD THREAD FINISHED";
 
     // the object deletes itself ! This is the last line in run().
     // Never touch the object after this statement
@@ -279,46 +286,59 @@ DownloadThread::sendNextDataBlock(QByteArray const &binary, int bNum) const {
 }
 
 bool DownloadThread::startBootloader() const {
-    qDebug() << "starting bootloader...";
+    qDebug() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+             << "starting bootloader...";
     int nTry = 5;
     while (--nTry >= 0) {
         m_hw->bl_startBL();
+        qDebug() << QDateTime::currentDateTime().time().toString(Qt::ISODate) << "bl_startBL() ..." << nTry;
         QThread::msleep(1000);
         m_hw->bl_checkBL();
+        qDebug() << QDateTime::currentDateTime().time().toString(Qt::ISODate) << "bl_checkBL() ..." << nTry;
         QThread::msleep(1000);
         if (m_hw->bl_isUp()) {
-            qInfo() << "starting bootloader...OK";
-            QThread::msleep(1000);
+            qInfo() << QDateTime::currentDateTime().time().toString(Qt::ISODate) << "bootloader... isUP" << nTry;
             return true;
         } else {
-            qCritical() << "bootloader not up (" << nTry << ")";
+            qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+                        << "bootloader not up (" << nTry << ")";
         }
     }
-    qCritical() << "starting bootloader...FAILED";
+    qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+                << "starting bootloader FAILED";
     return false;
 }
 
 bool DownloadThread::stopBootloader() const {
-    qDebug() << "stopping bootloader...";
+    qDebug() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+             << "stopping bootloader...";
     int nTry = 5;
     while (--nTry >= 0) {
         m_hw->bl_stopBL();
+        qDebug() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+                 << "bl_stopBL() ...";
         QThread::msleep(500);
+        m_hw->bl_checkBL();
+        qDebug() << QDateTime::currentDateTime().time().toString(Qt::ISODate) << "bl_checkBL() ..." << nTry;
         if (!m_hw->bl_isUp()) {
-            qInfo() << "stopping bootloader...OK";
+            qInfo() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+                    << "stopping bootloader OK";
             return true;
         }
     }
-    qCritical() << "stopping bootloader...FAILED";
+    qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+                << "stopping bootloader FAILED";
     return false;
 }
 
 bool DownloadThread::resetDeviceController() const {
-    qDebug() << "resetting device controller...";
+    qDebug() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+             << "resetting device controller...";
     m_hw->bl_rebootDC();
     // wait maximally 3 seconds, before starting bootloader
     QThread::sleep(1);
-    qInfo() << "resetting device controller...OK";
+    qInfo() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+            << "resetting device controller...OK";
     return true;
 }