diff --git a/Proxmark3GUI.pro b/Proxmark3GUI.pro
index fb350ff..642c458 100644
--- a/Proxmark3GUI.pro
+++ b/Proxmark3GUI.pro
@@ -20,13 +20,15 @@ SOURCES += \
     mainwindow.cpp \
     mf_attack_hardnesteddialog.cpp \
     mifare.cpp \
-    pm3process.cpp
+    pm3process.cpp \
+    util.cpp
 
 HEADERS += \
     mainwindow.h \
     mf_attack_hardnesteddialog.h \
     mifare.h \
-    pm3process.h
+    pm3process.h \
+    util.h
 
 FORMS += \
     mainwindow.ui \
diff --git a/mainwindow.cpp b/mainwindow.cpp
index ae5f08d..f68f91f 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -23,6 +23,7 @@ MainWindow::MainWindow(QWidget *parent)
 MainWindow::~MainWindow()
 {
     delete ui;
+    emit killPM3();
     pm3Thread->exit(0);
     pm3Thread->wait(5000);
     delete pm3;
@@ -62,7 +63,6 @@ void MainWindow::on_PM3_connectButton_clicked()
         QMessageBox::information(NULL, "Info", "Plz choose a port first", QMessageBox::Ok);
     else
     {
-        emit requiringOutput(true);
         emit connectPM3(ui->PM3_pathEdit->text(), port);
     }
 }
@@ -95,11 +95,7 @@ void MainWindow::on_PM3_disconnectButton_clicked()
 
 void MainWindow::on_Raw_sendCMDButton_clicked()
 {
-    if(ui->Raw_CMDHistoryWidget->count() == 0 || ui->Raw_CMDHistoryWidget->item(ui->Raw_CMDHistoryWidget->count() - 1)->text() != ui->Raw_CMDEdit->text())
-        ui->Raw_CMDHistoryWidget->addItem(ui->Raw_CMDEdit->text());
-    qDebug() << (ui->Raw_CMDEdit->text().toLocal8Bit());
-    pm3->write((ui->Raw_CMDEdit->text() + "\r\n").toLocal8Bit());
-    pm3->waitForBytesWritten(3000);
+    execCMD(ui->Raw_CMDEdit->text());
 }
 
 void MainWindow::on_Raw_clearOutputButton_clicked()
@@ -466,6 +462,8 @@ void MainWindow::signalInit()
     connect(this,&MainWindow::connectPM3,pm3,&PM3Process::connectPM3);
     connect(pm3, &PM3Process::PM3StatedChanged, this, &MainWindow::onPM3StateChanged);
     connect(this,&MainWindow::killPM3,pm3,&PM3Process::kill);
+
+    connect(this,&MainWindow::write,pm3,&PM3Process::write);
 }
 
 void MainWindow::setStatusBar(QLabel* target, const QString & text)
@@ -481,15 +479,18 @@ void MainWindow::setStatusBar(QLabel* target, const QString & text)
 void MainWindow::execCMD(QString cmd, bool gotoRawTab)
 {
     ui->Raw_CMDEdit->setText(cmd);
-    on_Raw_sendCMDButton_clicked();
+    if(ui->Raw_CMDHistoryWidget->count() == 0 || ui->Raw_CMDHistoryWidget->item(ui->Raw_CMDHistoryWidget->count() - 1)->text() != cmd)
+        ui->Raw_CMDHistoryWidget->addItem(cmd);
+    qDebug() << cmd;
+    emit write(cmd + "\r\n");
     if(gotoRawTab)
         ui->funcTab->setCurrentIndex(1);
 }
 
 QString MainWindow::execCMDWithOutput(QString cmd, int msec)
 {
-    pm3->setRequiringOutput(true);
-    execCMD(cmd, false);
+    emit requiringOutput(true);
+    execCMD(cmd);
     while(pm3->waitForReadyRead(msec))
         ;
     pm3->setRequiringOutput(false);
diff --git a/mainwindow.h b/mainwindow.h
index 22d200c..274fcdd 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -31,7 +31,7 @@ public:
 public slots:
     void refresh();
     void setStatusBar(QLabel* target,const QString & text);
-    void execCMD(QString cmd, bool gotoRawTab);
+    void execCMD(QString cmd, bool gotoRawTab=false);
     void onPM3StateChanged(bool st, QString info);
 private slots:
 
@@ -89,5 +89,6 @@ signals:
     void connectPM3(const QString path, const QString port);
     void killPM3();
     void setSerialListener(const QString &name, bool state);
+    void write(QString data);
 };
 #endif // MAINWINDOW_H
diff --git a/mainwindow.ui b/mainwindow.ui
index 6f068e7..0b6dfe6 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -623,6 +623,44 @@
                </property>
               </widget>
              </item>
+             <item>
+              <widget class="QPushButton" name="pushButton">
+               <property name="minimumSize">
+                <size>
+                 <width>0</width>
+                 <height>30</height>
+                </size>
+               </property>
+               <property name="maximumSize">
+                <size>
+                 <width>16777215</width>
+                 <height>40</height>
+                </size>
+               </property>
+               <property name="text">
+                <string>Lock UFUID Card</string>
+               </property>
+              </widget>
+             </item>
+             <item>
+              <widget class="QPushButton" name="pushButton_2">
+               <property name="minimumSize">
+                <size>
+                 <width>0</width>
+                 <height>30</height>
+                </size>
+               </property>
+               <property name="maximumSize">
+                <size>
+                 <width>16777215</width>
+                 <height>40</height>
+                </size>
+               </property>
+               <property name="text">
+                <string>About UID Card</string>
+               </property>
+              </widget>
+             </item>
              <item>
               <spacer name="horizontalSpacer_12">
                <property name="orientation">
@@ -848,6 +886,19 @@
           </item>
           <item>
            <layout class="QVBoxLayout" name="verticalLayout_3">
+            <item>
+             <widget class="QCheckBox" name="Raw_CMDHistoryBox">
+              <property name="layoutDirection">
+               <enum>Qt::LeftToRight</enum>
+              </property>
+              <property name="text">
+               <string>History:</string>
+              </property>
+              <property name="tristate">
+               <bool>false</bool>
+              </property>
+             </widget>
+            </item>
             <item>
              <widget class="QListWidget" name="Raw_CMDHistoryWidget">
               <property name="sizePolicy">
@@ -874,19 +925,6 @@
               </property>
              </widget>
             </item>
-            <item>
-             <widget class="QCheckBox" name="Raw_CMDHistoryBox">
-              <property name="layoutDirection">
-               <enum>Qt::LeftToRight</enum>
-              </property>
-              <property name="text">
-               <string>History:</string>
-              </property>
-              <property name="tristate">
-               <bool>false</bool>
-              </property>
-             </widget>
-            </item>
            </layout>
           </item>
          </layout>
diff --git a/pm3process.cpp b/pm3process.cpp
index 89afea0..308862d 100644
--- a/pm3process.cpp
+++ b/pm3process.cpp
@@ -77,7 +77,7 @@ void PM3Process::setSerialListener(const QString& name,bool state)
     }
 }
 
-void PM3Process::onTimeout()
+void PM3Process::onTimeout() //when the proxmark3 client is unexpectedly terminated or the PM3 hardware is removed, the isBusy() will return false(tested on Windows);
 {
     qDebug()<<portInfo->isBusy();
     if(!portInfo->isBusy())
@@ -92,3 +92,9 @@ void PM3Process::testThread()
 {
     qDebug()<<"PM3:"<<QThread::currentThread();
 }
+
+
+qint64 PM3Process::write(QString data)
+{
+    return QProcess::write(data.toLatin1());
+}
diff --git a/pm3process.h b/pm3process.h
index e3d6b5d..d30dc89 100644
--- a/pm3process.h
+++ b/pm3process.h
@@ -24,6 +24,7 @@ public slots:
     void setRequiringOutput(bool st);
     void connectPM3(const QString path, const QString port);
     void setSerialListener(const QString &name, bool state);
+    qint64 write(QString data);
 private slots:
     void onTimeout();
 private:
diff --git a/util.cpp b/util.cpp
new file mode 100644
index 0000000..cf92d3f
--- /dev/null
+++ b/util.cpp
@@ -0,0 +1,6 @@
+#include "util.h"
+
+Util::Util(QObject *parent) : QObject(parent)
+{
+
+}
diff --git a/util.h b/util.h
new file mode 100644
index 0000000..262fd4e
--- /dev/null
+++ b/util.h
@@ -0,0 +1,16 @@
+#ifndef UTIL_H
+#define UTIL_H
+
+#include <QObject>
+
+class Util : public QObject
+{
+    Q_OBJECT
+public:
+    explicit Util(QObject *parent = nullptr);
+
+signals:
+
+};
+
+#endif // UTIL_H