diff --git a/update.cpp b/update.cpp
index c42979c..ea6f086 100644
--- a/update.cpp
+++ b/update.cpp
@@ -17,12 +17,18 @@
 #include <QThread>
 #include <QDateTime>
 #include <QPluginLoader>
+#include <QMap>
 
 #define COLUMN_REQUEST      (0)
 #define COLUMN_NAME         (1)
 #define COLUMN_DATE_TIME    (2)
 #define COLUMN_RESULT       (3)
 
+static const QMap<QString, int> baudrateMap = {
+  {"1200"   ,   0}, {"9600"   ,   1}, {"19200"  ,   2}, {"38400"  ,   3},
+  {"57600"  ,   4}, {"115200" ,   5}
+};
+
 hwinf *Update::loadDCPlugin(QDir const &plugInDir, QString const &fname) {
     hwinf *hw = nullptr;
     if (plugInDir.exists()) {
@@ -78,12 +84,6 @@ Update::Update(hwinf *hw,
     , m_workingDir(workingDir)
     , m_init(true) {
 
-    // qCritical() << "workingDir" << m_workingDir;
-
-    // m_hw->dc_autoRequest(false);
-
-    return;
-
     execUpdateScript();
 
     if (!m_update_ctrl_file.exists()) {
@@ -106,8 +106,6 @@ Update::Update(hwinf *hw,
         m_init = false;
     }
     qDebug() << "Opened" << m_update_ctrl_file_copy.fileName();
-
-    //QApplication::processEvents();
 }
 
 Update::~Update() {
@@ -373,26 +371,116 @@ bool Update::updateBinary(char const *fileToSendToDC) {
     bool r;
     if ((r = fn.exists()) == true) {
         QString const linkTarget = fn.symLinkTarget();
-        qCritical() << "updating binary (dc): link target" << linkTarget;
-        // debug
-        //r = m_hw->dc_updateDC(linkTarget, m_baudrate, m_serialInterface);
-        qCritical() << "updating binary (dc): "
-                    << linkTarget << ((r == true) ? "OK" : "ERROR");
+        qInfo() << "updating binary (dc)" << linkTarget << "...";
+        if ((r = updateDC(linkTarget, m_baudrate, m_serialInterface)) == true) {
+            qInfo() << "updating binary (dc)" << linkTarget << "... done";
+        } else {
+            qCritical() << "updating binary (dc)" << linkTarget << "... FAILED";
+        }
     } else {
         qCritical() << "symlink" << fileToSendToDC << "does not exist";
     }
     return r;
 }
 
-bool Update::updatePrinterConf(int nrOfTemplate, char const *fileToSendToDC) {
+bool Update::updateDC(QString bFile, QString br, QString serial) const {
+    if (!baudrateMap.contains(br)) { // sanity check
+        qCritical() << "passed wrong baudrate" << br;
+        return false;
+    }
+
+    m_hw->dc_autoRequest(false);
+    qDebug() << "updating dc: " << bFile << br << serial << "...";
+
+    return true;
+
+    if (!openSerial(baudrateMap.value(br), br, serial)) {
+        return false;
+    }
+    if (!resetDeviceController()) {
+        closeSerial();
+        return false;
+    }
+    if (!startBootloader()) {
+        closeSerial();
+        return false;
+    }
+    if (!downloadBinaryToDC(bFile)) {
+        stopBootloader();
+        closeSerial();
+        qCritical() << "updating dc: " << bFile << br << serial << "...FAILED";
+        return false;
+    }
+
+    qInfo() << "updating dc: " << bFile << br << serial << "...OK";
+
+    stopBootloader();
+    QThread::sleep(3);
+
+    closeSerial();
+    return true;
+}
+
+bool Update::updatePrinterTemplate(enum FileTypeJson type,
+                                   int templateIdx,
+                                   QString fname,
+                                   QString br,
+                                   QString serial) const {
+    // sanity checks
+    if (!baudrateMap.contains(br)) {
+        qCritical() << "passed wrong baudrate" << br;
+        return false;
+    }
+    if (type != FileTypeJson::PRINTER) {
+        qCritical() << "wrong file type" << (uint8_t)type;
+        return false;
+    }
+    qDebug() << "updating: " << fname << br << serial << "...";
+    if (!serial.isNull()) {
+        if (!openSerial(baudrateMap.value(br), br, serial)) {
+            return false;
+        }
+    }
+    int nTry = 50;
+    while (!m_hw->sys_ready4sending()) { // wait max. 5 seconds
+        std::this_thread::sleep_for(std::chrono::milliseconds(100));
+        if (--nTry <= 0) {
+            qCritical() << "sys not ready for sending";
+            if (!serial.isNull()) {
+                closeSerial();
+            }
+            return false;
+        }
+    }
+    bool ret = true;
+    QFile file(fname);
+    if (file.exists() && file.open(QIODevice::ReadOnly)) {
+        QByteArray ba = file.readAll();
+        if (ba.size() <= 800) { // max. size is 800 bytes
+            if (m_hw->sys_sendJsonFileToDc((uint8_t)(type),
+                                           templateIdx,
+                                           (uint8_t *)ba.data())) {
+                std::this_thread::sleep_for(std::chrono::seconds(1));
+                qInfo() << "sent file" << fname << "to dc";
+            }
+        }
+    } else {
+        qCritical() << fname << "!!! does not exist!!!";
+        ret = false;
+    }
+    if (!serial.isNull()) {
+        closeSerial();
+    }
+    return ret;
+}
+
+bool Update::updatePrinterConf(int templateIdx, QString fileToSendToDC) {
     qCritical() << "updating printer template: " << fileToSendToDC;
-    return true; // debug
-    QVector<int> printTemplates{ nrOfTemplate };
-    QVector<QString> filesToSend{ fileToSendToDC };
-    //return m_hw->dc_updatePrinterTemplate(hwapi::FileTypeJson::PRINTER,
-    //                                      printTemplates, filesToSend,
-    //                                      QString(m_baudrate),
-    //                                      QString(m_serialInterface));
+    return updatePrinterTemplate(FileTypeJson::PRINTER,
+                                 templateIdx,
+                                 fileToSendToDC,
+                                 QString(m_baudrate),
+                                 QString(m_serialInterface));
 }
 
 QStringList Update::getOpenLines() {
@@ -451,6 +539,15 @@ bool Update::doUpdate() {
     }
 
     QStringList openLines = getOpenLines();
+    if (openLines.size() == 0) {
+        qCritical() << "No lines to handle in" << m_update_ctrl_file.fileName();
+        return false;
+    }
+
+    qDebug() << "open lines...";
+    for (int i=0; i< openLines.size(); ++i) {
+        qDebug() << "line" << i << ":" << openLines.at(i).trimmed();
+    }
 
     QList<QString>::const_iterator it;
     for (it = openLines.cbegin(); it != openLines.cend(); ++it) {
@@ -474,6 +571,7 @@ bool Update::doUpdate() {
             return false;
         }
         if (name.contains("dc2c") && name.endsWith(".bin")) {
+            qInfo() << "downloading" << name.trimmed() << "to DC";
             if ((res = updateBinary(name.toStdString().c_str())) == true) {
                 qInfo() << "downloaded binary" << name;
             }
@@ -481,22 +579,28 @@ bool Update::doUpdate() {
         if (name.contains("DC2C_print") && name.endsWith(".json")) {
             int i = name.indexOf("DC2C_print");
             int templateIdx = name.mid(i).midRef(10, 2).toInt();
-            if ((res = updatePrinterConf(templateIdx, name.toStdString().c_str())) == true) {
-                qInfo() << "downloaded printer template" << name;
+            if ((templateIdx < 1) || (templateIdx > 32)) {
+                qCritical() << "wrong template index";
+                res = false;
+            } else {
+                if ((res = updatePrinterConf(templateIdx, name)) == true) {
+                    qInfo() << "downloaded printer template" << name;
+                }
             }
         } else
         if (name.contains("opkg")) {
-            int i = name.indexOf("opkg ");
-            QString rest = name.mid(i+5).trimmed();
+            qInfo() << "starting" << name.trimmed();
             QScopedPointer<QProcess> p(new QProcess(this));
             p->setProcessChannelMode(QProcess::MergedChannels);
-            p->start("opkg", QStringList() << rest);
+            p->start(name.trimmed());
             if (p->waitForStarted(1000)) {
                 if (p->state() == QProcess::ProcessState::Running) {
-                    if (p->waitForFinished(10000)) {
+                    if (p->waitForFinished(100000)) {
                         QString output = p->readAllStandardOutput();
                         QStringList outputLst = split(output, QChar('\n'));
-                        qDebug() << outputLst;
+                        for (int line=0; line < outputLst.size(); ++line) {
+                            qDebug() << outputLst[line];
+                        }
                         res = true;
                         qInfo() << "EXECUTED" << name;
                     }