diff --git a/ground/src/app/app.pro b/ground/src/app/app.pro
index 30b7d4c46..5b74f8fed 100644
--- a/ground/src/app/app.pro
+++ b/ground/src/app/app.pro
@@ -10,8 +10,8 @@ SOURCES += main.cpp
 include(../rpath.pri)
 
 win32 {
-    CONFIG(debug, debug|release):LIBS *= -lExtensionSystemd -lAggregationd
-    else:LIBS *= -lExtensionSystem -lAggregation
+    CONFIG(debug, debug|release):LIBS *= -lExtensionSystemd -lAggregationd  -lQExtSerialPortd
+    else:LIBS *= -lExtensionSystem -lAggregation -lQExtSerialPort
 
     RC_FILE = openpilotgcs.rc
     target.path = /bin
diff --git a/ground/src/plugins/coreplugin/connectionmanager.cpp b/ground/src/plugins/coreplugin/connectionmanager.cpp
index 25421d0df..500b7acb2 100644
--- a/ground/src/plugins/coreplugin/connectionmanager.cpp
+++ b/ground/src/plugins/coreplugin/connectionmanager.cpp
@@ -37,6 +37,8 @@
 #include "fancytabwidget.h"
 #include "fancyactionbar.h"
 #include "mainwindow.h"
+#include "qextserialport/src/qextserialenumerator.h"
+#include "qextserialport/src/qextserialport.h"
 
 #include <QDebug>
 #include <QLabel>
@@ -137,7 +139,23 @@ void ConnectionManager::onConnectPressed()
         if(m_connectionDevice.connection)
         {
             QIODevice *ioDev = m_connectionDevice.connection->openDevice(m_connectionDevice.devName);
-
+            /*QextSerialPort *ioDev = new QextSerialPort("COM5");
+            ioDev->setBaudRate(BAUD57600);
+            ioDev->setFlowControl(FLOW_OFF);*/
+            ioDev->open(QIODevice::ReadWrite);
+            /*if(ioDev->isOpen())
+                ioDev->putChar('M');*/
+            QList<QextPortInfo> ports = QextSerialEnumerator::getPorts();
+            qDebug() << "List of ports:";
+            for (int i = 0; i < ports.size(); i++) {
+                qDebug() << "port name:" << ports.at(i).portName;
+                qDebug() << "friendly name:" << ports.at(i).friendName;
+                qDebug() << "physical name:" << ports.at(i).physName;
+                qDebug() << "enumerator name:" << ports.at(i).enumName;
+                qDebug() << "vendor ID:" << QString::number(ports.at(i).vendorID, 16);
+                qDebug() << "product ID:" << QString::number(ports.at(i).productID, 16);
+                qDebug() << "===================================";
+            }
             if(ioDev)
             {
                 emit deviceConnected(ioDev);
diff --git a/ground/src/plugins/coreplugin/coreplugin_dependencies.pri b/ground/src/plugins/coreplugin/coreplugin_dependencies.pri
index 8b548e717..db9796287 100644
--- a/ground/src/plugins/coreplugin/coreplugin_dependencies.pri
+++ b/ground/src/plugins/coreplugin/coreplugin_dependencies.pri
@@ -1,2 +1,3 @@
 include(../../libs/extensionsystem/extensionsystem.pri)
 include(../../libs/utils/utils.pri)
+include(../../libs/qextserialport/qextserialport.pri)
diff --git a/ground/src/plugins/rawhid/pjrc_rawhid_win.cpp b/ground/src/plugins/rawhid/pjrc_rawhid_win.cpp
index e1f84ba82..bbebd9504 100644
--- a/ground/src/plugins/rawhid/pjrc_rawhid_win.cpp
+++ b/ground/src/plugins/rawhid/pjrc_rawhid_win.cpp
@@ -36,7 +36,7 @@
 #include <ddk/hidsdi.h>
 #include <ddk/hidclass.h>
 
-#define printf //qDebug
+#define printf qDebug
 
 typedef struct hid_struct hid_t;
 struct hid_struct {
@@ -167,7 +167,7 @@ int pjrc_rawhid::open(int max, int vid, int pid, int usage_page, int usage)
 int pjrc_rawhid::receive(int num, void *buf, int len, int timeout)
 {
         hid_t *hid;
-        unsigned char tmpbuf[516];
+        unsigned char tmpbuf[516]={0};
         OVERLAPPED ov;
         DWORD n, r;
 
@@ -213,11 +213,11 @@ return_error:
 int pjrc_rawhid::send(int num, void *buf, int len, int timeout)
 {
         hid_t *hid;
-        unsigned char tmpbuf[516];
+        unsigned char tmpbuf[64]={0};
         OVERLAPPED ov;
         DWORD n, r;
 
-        if (sizeof(tmpbuf) < len + 1) return -1;
+        if (sizeof(tmpbuf) < (len + 1)) return -1;
         hid = get_hid(num);
         if (!hid || !hid->open) return -1;
         EnterCriticalSection(&tx_mutex);
@@ -226,7 +226,7 @@ int pjrc_rawhid::send(int num, void *buf, int len, int timeout)
         ov.hEvent = tx_event;
         tmpbuf[0] = 0;
         memcpy(tmpbuf + 1, buf, len);
-        if (!WriteFile(hid->handle, tmpbuf, len + 1, NULL, &ov)) {
+        if (!WriteFile(hid->handle, tmpbuf, 64, NULL, &ov)) {
                 if (GetLastError() != ERROR_IO_PENDING) goto return_error;
                 r = WaitForSingleObject(tx_event, timeout);
                 if (r == WAIT_TIMEOUT) goto return_timeout;
@@ -343,9 +343,12 @@ static void hid_close(hid_t *hid)
 static void print_win32_err(void)
 {
         char buf[256];
+        char temp[256];
         DWORD err;
 
         err = GetLastError();
-        FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err, 0, (WCHAR*)buf, sizeof(buf), NULL);
-        printf("err %ld: %s\n", err, buf);
+        //FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err, 0, (WCHAR*)buf, sizeof(buf), NULL);
+        FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err, MAKELANGID(LANG_ENGLISH, SUBLANG_DEFAULT), (WCHAR*)buf, sizeof(buf), NULL);
+        WideCharToMultiByte( CP_ACP, 0, (WCHAR*)buf, sizeof(buf), temp, sizeof(temp), NULL, NULL );
+        printf("err %ld: %s\n", err, temp);
 }