diff --git a/include/hwapi.h b/include/hwapi.h
index 3366bdc..fff7e9d 100644
--- a/include/hwapi.h
+++ b/include/hwapi.h
@@ -143,6 +143,10 @@ public:
 
     bool dc_updateDC(QString binFileName, QString baudrate,
                      QString comPort) const override;
+    
+    bool dc_updatePrinterTemplate(enum FileTypeJson type,
+                                  int templateNr,
+                                  QString const &fname) const override;
 
     // ------------------------------------------------------------------------------
     // Level 1, control device-controller (functions of µC)
diff --git a/include/interfaces.h b/include/interfaces.h
index aba7cb7..733e3f3 100644
--- a/include/interfaces.h
+++ b/include/interfaces.h
@@ -305,6 +305,10 @@ public:
                              QString baudrate,
                              QString comPort) const = 0;
         // download binary file down into device controller
+
+    virtual bool dc_updatePrinterTemplate(enum FileTypeJson type,
+                                          int templateNr,
+                                          QString const &fname) const = 0;
                        
     virtual void dc_autoRequest(bool on)  const =0;
         // on = true:  select that all READ-Requests are sent automatically 
diff --git a/src/hwapi.cpp b/src/hwapi.cpp
index 5b2017e..2d02096 100644
--- a/src/hwapi.cpp
+++ b/src/hwapi.cpp
@@ -11,6 +11,8 @@
 #include <unistd.h>
 #include <thread>
 
+#include <QFileInfo>
+
 #include "tslib.h"
 #include "hwapi.h"
 
@@ -404,6 +406,40 @@ bool hwapi::dc_updateDC(QString bFile, QString br, QString serial) const {
     return true;
 }
 
+/******************************************************************************/
+//
+//                   LEVEL 3: hwapi::dc_updatePrinterTemplate
+//
+/******************************************************************************/
+bool hwapi::dc_updatePrinterTemplate(enum FileTypeJson type,
+                                     int nrOfTemplate,
+                                     QString const &fname) const {
+    if ((type == FileTypeJson::PRINTER) &&
+        (nrOfTemplate >= 0 && nrOfTemplate <= 32)) {
+
+        int nTry = 50;
+        while (!sys_ready4sending()) { // wait max. 5 seconds
+            std::this_thread::sleep_for(std::chrono::milliseconds(100));
+            if (--nTry <= 0) {
+                return false;
+            } 
+        }
+        QFile file(fname);
+        if (file.exists() && file.open(QIODevice::ReadOnly)) {
+            QByteArray ba = file.readAll();
+            if (ba.size() <= 800) { // max. size is 800 bytes
+                if (sys_sendJsonFileToDc((uint8_t)(type),
+                                          nrOfTemplate,
+                                          (uint8_t *)ba.data())) {
+                    std::this_thread::sleep_for(std::chrono::seconds(1));
+                    return true;
+                }
+            }
+        }
+    }
+
+    return false;
+}
 
 // ------------------------------------------------------------------------------
 // Level 1, control device-controller (functions of µC)