diff --git a/common/pm3process.cpp b/common/pm3process.cpp
index a3435f8..5939be4 100644
--- a/common/pm3process.cpp
+++ b/common/pm3process.cpp
@@ -11,6 +11,7 @@ PM3Process::PM3Process(QThread* thread, QObject* parent): QProcess(parent)
     serialListener->setInterval(1000);
     serialListener->setTimerType(Qt::VeryCoarseTimer);
     connect(serialListener,&QTimer::timeout,this,&PM3Process::onTimeout);
+    connect(this,&PM3Process::readyRead,this,&PM3Process::onReadyRead);
 }
 
 void PM3Process::connectPM3(const QString path, const QString port)
@@ -44,18 +45,6 @@ void PM3Process::setRequiringOutput(bool st)
     if(isRequiringOutput)
         requiredOutput->clear();
 }
-QByteArray PM3Process::readLine(qint64 maxlen)
-{
-    QByteArray buff;
-    buff=QProcess::readLine(maxlen);
-    if(isRequiringOutput)
-        requiredOutput->append(buff);
-    return buff;
-}
-QString PM3Process::getRequiredOutput()
-{
-    return *requiredOutput;
-}
 
 bool PM3Process::waitForReadyRead(int msecs)
 {
@@ -77,7 +66,7 @@ void PM3Process::setSerialListener(const QString& name,bool state)
     }
 }
 
-void PM3Process::onTimeout() //when the proxmark3 client is unexpectedly terminated or the PM3 hardware is removed, the isBusy() will return false(tested on Windows);
+void PM3Process::onTimeout() //when the proxmark3 client is unexpectedly terminated or the PM3 hardware is removed, the isBusy() will return false(only tested on Windows);
 {
     qDebug()<<portInfo->isBusy();
     if(!portInfo->isBusy())
@@ -101,12 +90,13 @@ qint64 PM3Process::write(QString data)
 
 void PM3Process::onReadyRead()
 {
-    QString btay = readLine();
-//    while(btay != "")
-//    {
-//        qDebug() << btay;
-//        ui->Raw_outputEdit->insertPlainText(btay);
-//        btay = pm3->readLine();
-//    }
-//    ui->Raw_outputEdit->moveCursor(QTextCursor::End);
+    QString out = readAll();
+    if(isRequiringOutput)
+        requiredOutput->append(out);
+    if(out != "")
+    {
+        qDebug()<<"PM3Process::onReadyRead:" << out;
+        emit newOutput(out);
+
+    }
 }
diff --git a/common/pm3process.h b/common/pm3process.h
index 444babb..b6fd099 100644
--- a/common/pm3process.h
+++ b/common/pm3process.h
@@ -14,14 +14,11 @@ class PM3Process : public QProcess
     Q_OBJECT
 public:
     explicit PM3Process(QThread* thread, QObject* parent=nullptr);
-    QByteArray readLine(qint64 maxlen = 0);
-    QString getRequiredOutput();
     bool waitForReadyRead(int msecs = 2000);
 
     void testThread();
 
 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);
@@ -30,7 +27,8 @@ private slots:
     void onReadyRead();
 private:
     bool isRequiringOutput;
-    QString* requiredOutput;
+    QString* requiredOutput; // It only works in this class now
+    void setRequiringOutput(bool st);// It only works in this class now
     QTimer* serialListener;
     QSerialPortInfo* portInfo;
 signals:
diff --git a/common/util.cpp b/common/util.cpp
index 1a0415d..e9da6cb 100644
--- a/common/util.cpp
+++ b/common/util.cpp
@@ -2,10 +2,51 @@
 
 Util::Util(QObject *parent) : QObject(parent)
 {
+    isRequiringOutput=false;
+    requiredOutput=new QString();
+    timeStamp=QTime::currentTime();
+}
 
+void Util::processOutput(QString output)
+{
+    qDebug()<<"Util::processOutput:" << output;
+    if(isRequiringOutput)
+    {
+        requiredOutput->append(output);
+        timeStamp=QTime::currentTime();
+    }
+    emit refreshOutput(output);
 }
 
-void Util::processOutput()
+void Util::execCMD(QString cmd)
 {
+    qDebug() << cmd;
+    emit write(cmd + "\r\n");
+}
 
+QString Util::execCMDWithOutput(QString cmd, unsigned long timeout)
+{
+    QTime currTime=QTime::currentTime();
+    QTime targetTime = QTime::currentTime().addMSecs(timeout);
+    isRequiringOutput=true;
+    requiredOutput->clear();
+    execCMD(cmd);
+    while( QTime::currentTime() < targetTime)
+    {
+        QApplication::processEvents();
+        if(timeStamp>currTime)
+        {
+            currTime=timeStamp;
+            targetTime=timeStamp.addMSecs(timeout);
+        }
+    }
+    isRequiringOutput=false;
+    return *requiredOutput;
+}
+
+void Util::delay(unsigned int msec)
+{
+    QTime timer = QTime::currentTime().addMSecs(msec);
+    while( QTime::currentTime() < timer )
+        QApplication::processEvents(QEventLoop::AllEvents, 100);
 }
diff --git a/common/util.h b/common/util.h
index d935aa2..0e4c792 100644
--- a/common/util.h
+++ b/common/util.h
@@ -2,6 +2,12 @@
 #define UTIL_H
 
 #include <QObject>
+#include <QString>
+#include <QDebug>
+#include <QThread>
+#include <QApplication>
+#include <QTime>
+#include <QTimer>
 
 class Util : public QObject
 {
@@ -9,10 +15,19 @@ class Util : public QObject
 public:
     explicit Util(QObject *parent = nullptr);
 
-signals:
+    void execCMD(QString cmd);
+    QString execCMDWithOutput(QString cmd, unsigned long timeout=2000);
+    void delay(unsigned int msec);
+public slots:
+    void processOutput(QString output);
 
-private slots:
-    void processOutput();
+private:
+    bool isRequiringOutput;
+    QString* requiredOutput;
+    QTime timeStamp;
+signals:
+    void refreshOutput(const QString& output);
+    void write(QString data);
 };
 
 #endif // UTIL_H
diff --git a/module/mifare.cpp b/module/mifare.cpp
index 4db8426..2ae101a 100644
--- a/module/mifare.cpp
+++ b/module/mifare.cpp
@@ -46,3 +46,15 @@ void Mifare::setInputType(InputType tp)
 {
     inputType=tp;
 }
+
+bool Mifare::isKeyValid(const QString key)
+{
+    if(key.length() != 12)
+        return false;
+    for(int i = 0; i < 12; i++)
+    {
+        if(!((key[i] >= '0' && key[i] <= '9') || (key[i] >= 'A' && key[i] <= 'F')))
+            return false;
+    }
+    return true;
+}
diff --git a/module/mifare.h b/module/mifare.h
index 9c68719..9a7d473 100644
--- a/module/mifare.h
+++ b/module/mifare.h
@@ -3,6 +3,7 @@
 
 #include "common/util.h"
 #include <QObject>
+#include <QString>
 
 class Mifare : public QObject
 {
@@ -25,6 +26,7 @@ public:
 
     void setProcessingState(ProcessingState st);
     void setInputType(InputType tp);
+    bool isKeyValid(const QString key);
 public slots:
     void processData(const QString str);
     void processKey(const QString str);
diff --git a/ui/mainwindow.cpp b/ui/mainwindow.cpp
index f3e1400..659a8fc 100644
--- a/ui/mainwindow.cpp
+++ b/ui/mainwindow.cpp
@@ -97,7 +97,7 @@ void MainWindow::on_PM3_disconnectButton_clicked()
 
 void MainWindow::on_Raw_sendCMDButton_clicked()
 {
-    execCMD(ui->Raw_CMDEdit->text());
+    util->execCMD(ui->Raw_CMDEdit->text());
 }
 
 void MainWindow::on_Raw_clearOutputButton_clicked()
@@ -138,12 +138,13 @@ void MainWindow::on_Raw_CMDHistoryWidget_itemDoubleClicked(QListWidgetItem *item
 
 void MainWindow::on_MF_Attack_infoButton_clicked()
 {
-    execCMD("hf 14a info", true);
+    util->execCMD("hf 14a info");
+    ui->funcTab->setCurrentIndex(1);
 }
 
 void MainWindow::on_MF_Attack_chkButton_clicked()
 {
-    QString result = execCMDWithOutput("hf mf chk *1 ?");
+    QString result = util->execCMDWithOutput("hf mf chk *1 ?");
     result = result.mid(result.indexOf("|---|----------------|----------------|"));
     QStringList keys = result.split("\r\n");
     for(int i = 0; i < 16; i++)
@@ -156,7 +157,7 @@ void MainWindow::on_MF_Attack_chkButton_clicked()
 
 void MainWindow::on_MF_Attack_nestedButton_clicked()
 {
-    QString result = execCMDWithOutput("hf mf nested 1 *");
+    QString result = util->execCMDWithOutput("hf mf nested 1 *");
     result = result.mid(result.indexOf("|---|----------------|---|----------------|---|"));
     QStringList keys = result.split("\r\n");
     for(int i = 0; i < 16; i++)
@@ -172,18 +173,21 @@ void MainWindow::on_MF_Attack_nestedButton_clicked()
 void MainWindow::on_MF_Attack_hardnestedButton_clicked()
 {
     MF_Attack_hardnestedDialog dialog;
-    connect(&dialog, &MF_Attack_hardnestedDialog::sendCMD, this, &MainWindow::execCMD);
-    dialog.exec();
+    connect(&dialog, &MF_Attack_hardnestedDialog::sendCMD, util, &Util::execCMD);
+    if(dialog.exec()==QDialog::Accepted)
+        ui->funcTab->setCurrentIndex(1);
 }
 
 void MainWindow::on_MF_Attack_sniffButton_clicked()
 {
-    execCMD("hf mf sniff", true);
+    util->execCMD("hf mf sniff");
+    ui->funcTab->setCurrentIndex(1);
 }
 
 void MainWindow::on_MF_Attack_listButton_clicked()
 {
-    execCMD("hf list mf", true);
+    util->execCMD("hf list mf");
+    ui->funcTab->setCurrentIndex(1);
 }
 
 void MainWindow::on_MF_RW_readAllButton_clicked()
@@ -200,9 +204,9 @@ void MainWindow::on_MF_RW_readAllButton_clicked()
         isKeyBValid = false;
 
         // check keys and read the first block of each sector
-        if(ui->MF_keyWidget->item(i, 1) != nullptr && MF_isKeyValid(ui->MF_keyWidget->item(i, 1)->text()))
+        if(ui->MF_keyWidget->item(i, 1) != nullptr && mifare->isKeyValid(ui->MF_keyWidget->item(i, 1)->text()))
         {
-            result = execCMDWithOutput("hf mf rdbl "
+            result = util->execCMDWithOutput("hf mf rdbl "
                                        + QString::number(4 * i)
                                        + " A "
                                        + ui->MF_keyWidget->item(i, 1)->text(), waitTime);
@@ -213,9 +217,9 @@ void MainWindow::on_MF_RW_readAllButton_clicked()
             }
         }
         QApplication::processEvents();
-        if(ui->MF_keyWidget->item(i, 2) != nullptr && MF_isKeyValid(ui->MF_keyWidget->item(i, 2)->text()))
+        if(ui->MF_keyWidget->item(i, 2) != nullptr && mifare->isKeyValid(ui->MF_keyWidget->item(i, 2)->text()))
         {
-            result = execCMDWithOutput("hf mf rdbl "
+            result = util->execCMDWithOutput("hf mf rdbl "
                                        + QString::number(4 * i)
                                        + " B "
                                        + ui->MF_keyWidget->item(i, 2)->text(), waitTime);
@@ -232,7 +236,7 @@ void MainWindow::on_MF_RW_readAllButton_clicked()
             for(int j = 1; j < 4; j++)
             {
                 QApplication::processEvents();
-                result = execCMDWithOutput("hf mf rdbl "
+                result = util->execCMDWithOutput("hf mf rdbl "
                                            + QString::number(4 * i + j)
                                            + " "
                                            + (isKeyAValid ? "A" : "B")
@@ -275,7 +279,7 @@ void MainWindow::on_MF_RW_readAllButton_clicked()
             else
             {
                 QString tmpKey = result.right(18).replace(" ", "");
-                result = execCMDWithOutput("hf mf rdbl "
+                result = util->execCMDWithOutput("hf mf rdbl "
                                            + QString::number(4 * i + 3)
                                            + " B "
                                            + tmpKey, waitTime);
@@ -297,7 +301,7 @@ void MainWindow::on_MF_RW_readAllButton_clicked()
 
 void MainWindow::on_MF_RW_readBlockButton_clicked()
 {
-    QString result = execCMDWithOutput("hf mf rdbl "
+    QString result = util->execCMDWithOutput("hf mf rdbl "
                                        + ui->MF_RW_blockBox->currentText()
                                        + " "
                                        + ui->MF_RW_keyTypeBox->currentText()
@@ -316,7 +320,7 @@ void MainWindow::on_MF_RW_readBlockButton_clicked()
                 }
                 ui->MF_RW_dataEdit->setText(result);
                 QString tmpKey = result.right(18).replace(" ", "");
-                result = execCMDWithOutput("hf mf rdbl "
+                result = util->execCMDWithOutput("hf mf rdbl "
                                            + ui->MF_RW_keyTypeBox->currentText()
                                            + " B "
                                            + tmpKey);
@@ -343,7 +347,7 @@ void MainWindow::on_MF_RW_readBlockButton_clicked()
 
 void MainWindow::on_MF_RW_writeBlockButton_clicked()
 {
-    QString result = execCMDWithOutput("hf mf wrbl "
+    QString result = util->execCMDWithOutput("hf mf wrbl "
                                        + ui->MF_RW_blockBox->currentText()
                                        + " "
                                        + ui->MF_RW_keyTypeBox->currentText()
@@ -364,7 +368,7 @@ void MainWindow::on_MF_RW_writeAllButton_clicked()
     {
         for(int j = 0; j < 4; j++)
         {
-            result = execCMDWithOutput("hf mf wrbl "
+            result = util->execCMDWithOutput("hf mf wrbl "
                                        + QString::number(i * 4 + j)
                                        + " A "
                                        + ui->MF_keyWidget->item(i, 1)->text()
@@ -372,7 +376,7 @@ void MainWindow::on_MF_RW_writeAllButton_clicked()
                                        + ui->MF_dataWidget->item(2, i * 4 + j)->text().replace(" ", ""));
             if(result.indexOf("isOk:01") == -1)
             {
-                result = execCMDWithOutput("hf mf wrbl "
+                result = util->execCMDWithOutput("hf mf wrbl "
                                            + QString::number(i * 4 + j)
                                            + " B "
                                            + ui->MF_keyWidget->item(i, 2)->text()
@@ -388,18 +392,20 @@ void MainWindow::on_MF_RW_writeAllButton_clicked()
 
 // ******************** other ********************
 
-void MainWindow::refresh()
+void MainWindow::refreshOutput(const QString& output)
 {
-    QString btay = pm3->readLine();
-    while(btay != "")
-    {
-        qDebug() << btay;
-        ui->Raw_outputEdit->insertPlainText(btay);
-        btay = pm3->readLine();
-    }
+    qDebug()<<"MainWindow::refresh:" << output;
+    ui->Raw_outputEdit->insertPlainText(output);
     ui->Raw_outputEdit->moveCursor(QTextCursor::End);
 }
 
+void MainWindow::refreshCMD(const QString& cmd)
+{
+    ui->Raw_CMDEdit->setText(cmd);
+    if(cmd!=""&&(ui->Raw_CMDHistoryWidget->count() == 0 || ui->Raw_CMDHistoryWidget->item(ui->Raw_CMDHistoryWidget->count() - 1)->text() != cmd))
+        ui->Raw_CMDHistoryWidget->addItem(cmd);
+}
+
 void MainWindow::sendMSG()
 {
     if(ui->Raw_CMDEdit->hasFocus())
@@ -458,14 +464,14 @@ void MainWindow::uiInit()
 
 void MainWindow::signalInit()
 {
-//    connect(pm3, &PM3Process::readyRead, util, &MainWindow::refresh);
+    connect(pm3, &PM3Process::newOutput, util, &Util::processOutput);
+    connect(util,&Util::refreshOutput,this,&MainWindow::refreshOutput);
 
-    connect(this,&MainWindow::requiringOutput,pm3,&PM3Process::setRequiringOutput);
     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);
+    connect(util,&Util::write,pm3,&PM3Process::write);
 }
 
 void MainWindow::setStatusBar(QLabel* target, const QString & text)
@@ -477,39 +483,6 @@ void MainWindow::setStatusBar(QLabel* target, const QString & text)
     else if(target == programStatusBar)
         target->setText("Program State:" + text);
 }
-
-void MainWindow::execCMD(QString cmd, bool gotoRawTab)
-{
-    ui->Raw_CMDEdit->setText(cmd);
-    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)
-{
-    emit requiringOutput(true);
-    execCMD(cmd);
-    while(pm3->waitForReadyRead(msec))
-        ;
-    pm3->setRequiringOutput(false);
-    return pm3->getRequiredOutput();
-}
-
-bool MainWindow::MF_isKeyValid(const QString key)
-{
-    if(key.length() != 12)
-        return false;
-    for(int i = 0; i < 12; i++)
-    {
-        if(!((key[i] >= '0' && key[i] <= '9') || (key[i] >= 'A' && key[i] <= 'F')))
-            return false;
-    }
-    return true;
-}
 // ***********************************************
 
 
diff --git a/ui/mainwindow.h b/ui/mainwindow.h
index c595fa8..78bc720 100644
--- a/ui/mainwindow.h
+++ b/ui/mainwindow.h
@@ -28,11 +28,10 @@ public:
     ~MainWindow();
 
     bool MF_isKeyValid(const QString key);
-    QString execCMDWithOutput(QString cmd, int msec=2000);
 public slots:
-    void refresh();
+    void refreshOutput(const QString &output);
+    void refreshCMD(const QString &cmd);
     void setStatusBar(QLabel* target,const QString & text);
-    void execCMD(QString cmd, bool gotoRawTab=false);
     void onPM3StateChanged(bool st, QString info);
 private slots:
 
@@ -87,10 +86,8 @@ private:
     QLabel* PM3VersionBar;
     void signalInit();
 signals:
-    void requiringOutput(bool st);
     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/ui/mainwindow.ui b/ui/mainwindow.ui
index 0b6dfe6..d9688e8 100644
--- a/ui/mainwindow.ui
+++ b/ui/mainwindow.ui
@@ -88,7 +88,7 @@
        </sizepolicy>
       </property>
       <property name="currentIndex">
-       <number>1</number>
+       <number>0</number>
       </property>
       <widget class="QWidget" name="mifareTab">
        <attribute name="title">
diff --git a/ui/mf_attack_hardnesteddialog.h b/ui/mf_attack_hardnesteddialog.h
index d5c066f..74cd17b 100644
--- a/ui/mf_attack_hardnesteddialog.h
+++ b/ui/mf_attack_hardnesteddialog.h
@@ -19,7 +19,7 @@ public:
 private:
     Ui::MF_Attack_hardnestedDialog *ui;
 signals:
-    void sendCMD(QString cmd, bool requireJump = true);
+    void sendCMD(QString cmd);
 private slots:
     void on_buttonBox_accepted();
 };