diff --git a/logic/include/model/ButtonHelper.h b/logic/include/model/ButtonHelper.h
index a85ade7..d497a89 100644
--- a/logic/include/model/ButtonHelper.h
+++ b/logic/include/model/ButtonHelper.h
@@ -24,9 +24,9 @@ public: \
     Q_SIGNAL void SMALL_NAME ## LedChanged(char value)
 
 /*************************************************************************************************/
-#define PUSH_BUTTON_NO_LED(CAPITAL_NAME, SMALL_NAME, FUNC_CODE) \
+#define PUSH_BUTTON_PROBE_SLOT(CAPITAL_NAME, SMALL_NAME, SLOT_NUMBER) \
 private:    \
-    PushButton _ ## SMALL_NAME{FUNC_CODE}; \
+    PushButton _ ## SMALL_NAME{SLOT_NUMBER}; \
     void init ## CAPITAL_NAME()    \
     {   \
         connect(this, &Console::dataReady, _ ## SMALL_NAME.getLed(), &Led::newData); \
@@ -37,19 +37,20 @@ public: \
     void press ## CAPITAL_NAME()    \
     {   \
         auto arr = _ ## SMALL_NAME.press(); \
-        _dataSender->send(arr); \
+        arr[5] = static_cast<char>(this->selectedProbe ## SLOT_NUMBER); \
+        _dataSender->sendProbeSlots(arr); \
+        emit changeProbeSelectionEnable ## SLOT_NUMBER(); \
     } \
     void release ## CAPITAL_NAME()  \
     {   \
-        auto arr = _ ## SMALL_NAME.release(); \
-        _dataSender->send(arr); \
     } \
-    Q_SIGNAL void SMALL_NAME ## LedChanged(char value)
+    Q_SIGNAL void SMALL_NAME ## LedChanged(char value); \
+    Q_SIGNAL void changeProbeSelectionEnable ## SLOT_NUMBER()
 
 /*************************************************************************************************/
-#define ROTARY_BUTTON(CAPITAL_NAME, SMALL_NAME, FUNC_CODE, LED_FUNC_CODE) \
+#define PUSH_BUTTON_NO_LED(CAPITAL_NAME, SMALL_NAME, FUNC_CODE) \
 private:    \
-    RotaryButton _ ## SMALL_NAME{FUNC_CODE, LED_FUNC_CODE}; \
+    PushButton _ ## SMALL_NAME {FUNC_CODE}; \
     void init ## CAPITAL_NAME()    \
     {   \
         connect(this, &Console::dataReady, _ ## SMALL_NAME.getLed(), &Led::newData); \
@@ -57,17 +58,22 @@ private:    \
                 SIGNAL(SMALL_NAME ## LedChanged(char))); \
     } \
 public: \
-    void rotate ## CAPITAL_NAME(int value)    \
+    void press ## CAPITAL_NAME()    \
     {   \
-        auto arr = _ ## SMALL_NAME.rotate(value); \
+        auto arr = _ ## SMALL_NAME.press(); \
+        _dataSender->send(arr); \
+    } \
+    void release ## CAPITAL_NAME()  \
+    {   \
+        auto arr = _ ## SMALL_NAME.release(); \
         _dataSender->send(arr); \
     } \
     Q_SIGNAL void SMALL_NAME ## LedChanged(char value)
 
 /*************************************************************************************************/
-#define ROTARY_BUTTON_NO_LED(CAPITAL_NAME, SMALL_NAME, FUNC_CODE) \
+#define ROTARY_BUTTON(CAPITAL_NAME, SMALL_NAME, FUNC_CODE, LED_FUNC_CODE) \
 private:    \
-    RotaryButton _ ## SMALL_NAME{FUNC_CODE}; \
+    RotaryButton _ ## SMALL_NAME{FUNC_CODE, LED_FUNC_CODE}; \
     void init ## CAPITAL_NAME()    \
     {   \
         connect(this, &Console::dataReady, _ ## SMALL_NAME.getLed(), &Led::newData); \
@@ -83,9 +89,9 @@ public: \
     Q_SIGNAL void SMALL_NAME ## LedChanged(char value)
 
 /*************************************************************************************************/
-#define DROP_DOWN(CAPITAL_NAME, SMALL_NAME, FUNC_CODE, LED_FUNC_CODE) \
+#define ROTARY_BUTTON_NO_LED(CAPITAL_NAME, SMALL_NAME, FUNC_CODE) \
 private:    \
-    DropDown _ ## SMALL_NAME{FUNC_CODE, LED_FUNC_CODE}; \
+    RotaryButton _ ## SMALL_NAME{FUNC_CODE}; \
     void init ## CAPITAL_NAME()    \
     {   \
         connect(this, &Console::dataReady, _ ## SMALL_NAME.getLed(), &Led::newData); \
@@ -93,9 +99,9 @@ private:    \
                 SIGNAL(SMALL_NAME ## LedChanged(char))); \
     } \
 public: \
-    void select ## CAPITAL_NAME(int value)    \
+    void rotate ## CAPITAL_NAME(int value)    \
     {   \
-        auto arr = _ ## SMALL_NAME.select(value); \
+        auto arr = _ ## SMALL_NAME.rotate(value); \
         _dataSender->send(arr); \
     } \
     Q_SIGNAL void SMALL_NAME ## LedChanged(char value)
diff --git a/logic/include/model/Console.h b/logic/include/model/Console.h
index 4846fc0..200906b 100644
--- a/logic/include/model/Console.h
+++ b/logic/include/model/Console.h
@@ -14,7 +14,6 @@
 #include "FunctionCodes.h"
 #include "PushButton.h"
 #include "RotaryButton.h"
-#include "DropDown.h"
 
 #include "DataSender.h"
 #include "Logger.h"
@@ -23,11 +22,11 @@ class Console : public QObject
 {
 	Q_OBJECT
 
-    //Slotes
-    DROP_DOWN(Slot1, slot1, SLOT1_FC, static_cast<char>(SLOT1_LED_FC));
-    DROP_DOWN(Slot2, slot2, SLOT2_FC, static_cast<char>(SLOT2_LED_FC));
-    DROP_DOWN(Slot3, slot3, SLOT3_FC, static_cast<char>(SLOT3_LED_FC));
-    DROP_DOWN(Slot4, slot4, SLOT4_FC, static_cast<char>(SLOT4_LED_FC));
+    //Probe slotes
+    PUSH_BUTTON_PROBE_SLOT(Slot1, slot1, 1);
+    PUSH_BUTTON_PROBE_SLOT(Slot2, slot2, 2);
+    PUSH_BUTTON_PROBE_SLOT(Slot3, slot3, 3);
+    PUSH_BUTTON_PROBE_SLOT(Slot4, slot4, 4);
 
 	//PushButton with LED
 	PUSH_BUTTON(Dual, dual, DUAL_FC, static_cast<char>(DUAL_LED_FC));
@@ -118,6 +117,11 @@ private:
 public:
 	Console();
 
+    int selectedProbe1 = 0;
+    int selectedProbe2 = 0;
+    int selectedProbe3 = 0;
+    int selectedProbe4 = 0;
+
 	void injectDataSender(DataSender* sender);
 	void injectLogger(Logger* logger);
 	void hasValidDataFormat(const QByteArray& data);
diff --git a/logic/include/model/DataSender.h b/logic/include/model/DataSender.h
index e0f4ad6..3b5873c 100644
--- a/logic/include/model/DataSender.h
+++ b/logic/include/model/DataSender.h
@@ -10,12 +10,14 @@ class DataSender : public QObject
 
 public:
     virtual void send(const QByteArray& data) = 0;
+    virtual void sendProbeSlots(const QByteArray& data) = 0;
     virtual ~DataSender()
     {
     }
 
 signals:
     void dataReady(const QByteArray& data);
+    void probeSlotsDataReady(const QByteArray& data);
 };
 
 #endif //DATASENDER_H
diff --git a/logic/include/model/DatabaseManager.h b/logic/include/model/DatabaseManager.h
index f321a33..891fc3f 100644
--- a/logic/include/model/DatabaseManager.h
+++ b/logic/include/model/DatabaseManager.h
@@ -1,13 +1,20 @@
-#ifndef DatabaseManager_H
-#define DatabaseManager_H
+#ifndef DATABASEMANAGER_H
+#define DATABASEMANAGER_H
+
+#include <QSqlDatabase>
+#include <QDebug>
 
 class DatabaseManager
 {
 private:
-	char _functionCode;
+    QSqlDatabase _db;
 
 public:
-    DatabaseManager(char functionCode);
+    DatabaseManager(const QString& databasePath);
+    ~DatabaseManager();
+
+    QList<QVariant> getProbeIds();
+    QList<QVariant> getProbeNames();
 };
 
-#endif //DatabaseManager_H
+#endif //DATABASEMANAGER_H
diff --git a/logic/include/model/FunctionCodes.h b/logic/include/model/FunctionCodes.h
index cfad5dc..ac2dd94 100644
--- a/logic/include/model/FunctionCodes.h
+++ b/logic/include/model/FunctionCodes.h
@@ -1,16 +1,6 @@
 #ifndef FUNCTIONCODES_H
 #define FUNCTIONCODES_H
 
-//Probes and LED of probes
-#define SLOT1_FC 0x01
-#define SLOT2_FC 0x09
-#define SLOT3_FC 0x19
-#define SLOT4_FC 0x18
-#define SLOT1_LED_FC 0x20
-#define SLOT2_LED_FC 0x27
-#define SLOT3_LED_FC 0x30
-#define SLOT4_LED_FC 0x48
-
 //Buttons
 #define DUAL_FC 0x1D
 #define QUAD_FC 0x1C
diff --git a/logic/include/network/UdpDataSender.h b/logic/include/network/UdpDataSender.h
index 6a38573..f3b225b 100644
--- a/logic/include/network/UdpDataSender.h
+++ b/logic/include/network/UdpDataSender.h
@@ -10,18 +10,21 @@ class UdpDataSender : public DataSender
     Q_OBJECT
 
 private:
-    QUdpSocket* _socket;
+    QUdpSocket* _socketDashboard;
+    QUdpSocket* _socketProbeSlots;
 
 public:
     UdpDataSender();
     ~UdpDataSender() override;
 
     void send(const QByteArray& data) override;
+    void sendProbeSlots(const QByteArray& data) override;
 
 //uncrustify off
 public slots:
 //uncrustify on
     void read();
+    void readProbeSlots();
 };
 
 #endif //UDPDATASENDER_H
diff --git a/logic/include/viewModel/MainViewModel.h b/logic/include/viewModel/MainViewModel.h
index 8204ccc..1c54b8c 100644
--- a/logic/include/viewModel/MainViewModel.h
+++ b/logic/include/viewModel/MainViewModel.h
@@ -20,11 +20,23 @@ class MainViewModel : public QtMvvm::ViewModel
 	MVVM_PROPERTY(int, stepInc, 1)
 	MVVM_PROPERTY(int, stepDec, -1)
 
-    //Slots
-    DROP_DOWN_PROPERTY(slot1, Slot1, LED_OFF)
-    DROP_DOWN_PROPERTY(slot2, Slot2, LED_OFF)
-    DROP_DOWN_PROPERTY(slot3, Slot3, LED_OFF)
-    DROP_DOWN_PROPERTY(slot4, Slot4, LED_OFF)
+    //Probes
+    BUTTON_LED_PROPERTY(slot1, Slot1, false, LED_COLOR_GREEN)
+    BUTTON_LED_PROPERTY(slot2, Slot2, false, LED_COLOR_WHITE)
+    BUTTON_LED_PROPERTY(slot3, Slot3, false, LED_COLOR_WHITE)
+    BUTTON_LED_PROPERTY(slot4, Slot4, false, LED_COLOR_WHITE)
+
+    MVVM_PROPERTY(QList<QVariant>, probeList, {})
+
+    MVVM_PROPERTY(int, currentSelectedProbe1, 0)
+    MVVM_PROPERTY(int, currentSelectedProbe2, 0)
+    MVVM_PROPERTY(int, currentSelectedProbe3, 0)
+    MVVM_PROPERTY(int, currentSelectedProbe4, 0)
+
+    MVVM_PROPERTY(bool, isProbeSelectionEnable1, false)
+    MVVM_PROPERTY(bool, isProbeSelectionEnable2, true)
+    MVVM_PROPERTY(bool, isProbeSelectionEnable3, true)
+    MVVM_PROPERTY(bool, isProbeSelectionEnable4, true)
 
 	//Top Left
     BUTTON_LED_PROPERTY(patient, Patient, false, LED_OFF)
@@ -135,29 +147,17 @@ class MainViewModel : public QtMvvm::ViewModel
 	BUTTON_PROPERTY(js4Bottom, Js4Bottom, false)
 	BUTTON_PROPERTY(js5Bottom, Js5Bottom, false)
 
-	JOYSTICK_PROPERTY(js1, Js1)
-	JOYSTICK_PROPERTY(js2, Js2)
-	JOYSTICK_PROPERTY(js3, Js3)
-	JOYSTICK_PROPERTY(js4, Js4)
-	JOYSTICK_PROPERTY(js5, Js5)
-
-    //Probes
-//BUTTON_LED_PROPERTY(probe1, Probe1, false, LED_OFF)
-//BUTTON_LED_PROPERTY(probe2, Probe2, false, LED_OFF)
-//BUTTON_LED_PROPERTY(probe3, Probe3, false, LED_OFF)
-//BUTTON_LED_PROPERTY(probe4, Probe4, false, LED_OFF)
-
-    MVVM_PROPERTY(QList<QVariant>, probeList, QList<QVariant>({"Pouya", "Mamad"}))
-
-    MVVM_PROPERTY(int, currentSelectedProbe1, 0)
-    MVVM_PROPERTY(int, currentSelectedProbe2, 0)
-    MVVM_PROPERTY(int, currentSelectedProbe3, 0)
-    MVVM_PROPERTY(int, currentSelectedProbe4, 0)
+    JOYSTICK_PROPERTY(js1, Js1)
+    JOYSTICK_PROPERTY(js2, Js2)
+    JOYSTICK_PROPERTY(js3, Js3)
+    JOYSTICK_PROPERTY(js4, Js4)
+    JOYSTICK_PROPERTY(js5, Js5)
 
 public:
 	Q_INVOKABLE explicit MainViewModel(QObject* parent = nullptr);
 
 private:
+    const QString _dbPath = "database/ProbeProperties.db";
 
 signals:
 	void ledChanged(char value);
@@ -165,10 +165,10 @@ signals:
 //uncrustify off
 public slots:
     //Probes
-//    LED_SLOT(slot1)
-//    LED_SLOT(slot2)
-//    LED_SLOT(slot3)
-//    LED_SLOT(slot4)
+    LED_SLOT(slot1)
+    LED_SLOT(slot2)
+    LED_SLOT(slot3)
+    LED_SLOT(slot4)
 
 	//Top Left
 	LED_SLOT(patient)
@@ -235,7 +235,6 @@ public slots:
 	LED_SLOT(focusCenter)
 	LED_SLOT(depthBottom)
 	LED_SLOT(focusBottom)
-
 //uncrustify on
 };
 
diff --git a/logic/include/viewModel/utils/Property.h b/logic/include/viewModel/utils/Property.h
index 459de35..db5ea7d 100644
--- a/logic/include/viewModel/utils/Property.h
+++ b/logic/include/viewModel/utils/Property.h
@@ -8,8 +8,8 @@
 #define MVVM_PROPERTY(TYPE, NAME, DEFAULT_VALUE) \
 	Q_PROPERTY(TYPE NAME READ NAME WRITE NAME NOTIFY NAME ## Changed ) \
 	public: \
-		TYPE NAME() const { return _ ## NAME ; } \
-		void NAME(TYPE value) { \
+        TYPE NAME() const { return _ ## NAME ; } \
+        void NAME(TYPE value) { \
 			if (_ ## NAME == value)  return; \
 				_ ## NAME = value; \
 			emit NAME ## Changed(value); \
@@ -77,16 +77,5 @@
 			NAME ## Led(static_cast<int>(value)); \
 		} \
 
-/**************************************************************************************************/
-#define DROP_DOWN_PROPERTY(NAME, CAP_NAME, LED_DEF_VAL) \
-    MVVM_PROPERTY_CUSTOM(bool, NAME, false) \
-    void NAME ## Handle() { \
-        if(NAME()) \
-        { \
-            panel->select ## CAP_NAME('stepDec()'); \
-        } \
-    } \
-
-//uncrustify on
 
 #endif //PROPERTY_H
diff --git a/logic/logic.pro b/logic/logic.pro
index eef9d5b..c49c991 100644
--- a/logic/logic.pro
+++ b/logic/logic.pro
@@ -1,6 +1,7 @@
 TEMPLATE = lib
 
-QT += mvvmcore network
+QT += mvvmcore network sql
+
 # Creating a static library is typically more efficient. You can still create a shared library if you want to
 CONFIG += c++14 static
 
@@ -9,10 +10,10 @@ TARGET = logic
 DEFINES += QT_DEPRECATED_WARNINGS
 
 SOURCES += $$files(src/*.cpp, true) \
-    src/model/DropDown.cpp
+
 
 HEADERS += $$files(include/*.h, true) \
-    include/model/DropDown.h
+
 
 INCLUDEPATH += $$PWD/include/
 
diff --git a/logic/src/model/DatabaseManager.cpp b/logic/src/model/DatabaseManager.cpp
index b3ab640..30b9e30 100644
--- a/logic/src/model/DatabaseManager.cpp
+++ b/logic/src/model/DatabaseManager.cpp
@@ -1,6 +1,69 @@
 #include "model/DatabaseManager.h"
 
-DatabaseManager::DatabaseManager(char functionCode)
+#include <QDebug>
+#include <QSqlQuery>
+#include <QSqlError>
+
+DatabaseManager::DatabaseManager(const QString& databasePath)
+{
+    _db = QSqlDatabase::addDatabase("QSQLITE");
+    _db.setDatabaseName(databasePath);
+
+    if(!_db.open())
+    {
+        qDebug() << "Error: " << _db.lastError().text();
+    }
+}
+
+/*************************************************************************************************/
+DatabaseManager::~DatabaseManager()
+{
+    if(_db.isOpen())
+    {
+        _db.close();
+    }
+}
+
+/*************************************************************************************************/
+QList<QVariant> DatabaseManager::getProbeIds()
 {
-	_functionCode = functionCode;
+    QList<QVariant> globalIds;
+
+    QSqlQuery query;
+    if(query.exec("SELECT globalId FROM Probe"))
+    {
+        while(query.next())
+        {
+            QString globalId = query.value(0).toString();
+            globalIds.append(QVariant(globalId));
+        }
+    }
+    else
+    {
+        qDebug() << "Error executing query: " << query.lastError().text();
+    }
+
+    return globalIds;
+}
+
+/*************************************************************************************************/
+QList<QVariant> DatabaseManager::getProbeNames()
+{
+    QList<QVariant> names;
+
+    QSqlQuery query;
+    if(query.exec("SELECT name FROM Probe"))
+    {
+        while(query.next())
+        {
+            QString name = query.value(0).toString();
+            names.append(QVariant(name));
+        }
+    }
+    else
+    {
+        qDebug() << "Error executing query: " << query.lastError().text();
+    }
+
+    return names;
 }
diff --git a/logic/src/network/UdpDataSender.cpp b/logic/src/network/UdpDataSender.cpp
index 2f3f65e..57e1ec4 100644
--- a/logic/src/network/UdpDataSender.cpp
+++ b/logic/src/network/UdpDataSender.cpp
@@ -4,31 +4,51 @@
 
 void UdpDataSender::send(const QByteArray& data)
 {
-    _socket->writeDatagram(data, QHostAddress::LocalHost, 5446);
+    _socketDashboard->writeDatagram(data, QHostAddress::LocalHost, 5446);
+}
+
+/*************************************************************************************************/
+void UdpDataSender::sendProbeSlots(const QByteArray& data)
+{
+    _socketProbeSlots->writeDatagram(data, QHostAddress::LocalHost, 5450);
 }
 
 /*************************************************************************************************/
 void UdpDataSender::read()
 {
     char data[DATAGRAM_SIZE];
-    int cnt = _socket->readDatagram(data, DATAGRAM_SIZE);
+    int cnt = _socketDashboard->readDatagram(data, DATAGRAM_SIZE);
     QByteArray a(data, cnt);
     emit dataReady(a);
 }
 
 /*************************************************************************************************/
-UdpDataSender::UdpDataSender()
+void UdpDataSender::readProbeSlots()
 {
-    _socket = new QUdpSocket();
+    char data[DATAGRAM_SIZE];
+    int cnt = _socketProbeSlots->readDatagram(data, DATAGRAM_SIZE);
+    QByteArray a(data, cnt);
+    emit probeSlotsDataReady(a);
+}
 
-    _socket->bind(QHostAddress::Any, 5445);
+/*************************************************************************************************/
+UdpDataSender::UdpDataSender()
+{
+    _socketDashboard = new QUdpSocket();
+    _socketDashboard->bind(QHostAddress::Any, 5445);
+    connect(_socketDashboard, SIGNAL(readyRead()), this, SLOT(read()));
 
-    connect(_socket, SIGNAL(readyRead()), this, SLOT(read()));
+    _socketProbeSlots = new QUdpSocket();
+    _socketProbeSlots->bind(QHostAddress::Any, 5449);
+    connect(_socketProbeSlots, SIGNAL(readyRead()), this, SLOT(readProbeSlots()));
 }
 
 /*************************************************************************************************/
 UdpDataSender::~UdpDataSender()
 {
-    _socket->close();
-    delete _socket;
+    _socketDashboard->close();
+    delete _socketDashboard;
+
+    _socketProbeSlots->close();
+    delete _socketProbeSlots;
 }
diff --git a/logic/src/viewModel/MainViewModel.cpp b/logic/src/viewModel/MainViewModel.cpp
index 0e7232f..02faedd 100644
--- a/logic/src/viewModel/MainViewModel.cpp
+++ b/logic/src/viewModel/MainViewModel.cpp
@@ -5,12 +5,13 @@
 #include "model/Console.h"
 #include "logger/ConsoleLogger.h"
 #include "network/UdpDataSender.h"
+#include "model/DatabaseManager.h"
 
+#define US_HOME_PATH "US_HOME"
 #define CONNECT_LED(NAME) \
 	connect(panel, SIGNAL(NAME ## LedChanged(char)), this, SLOT(NAME ## LedHandle(char)));
 
-MainViewModel::MainViewModel(QObject* parent) :
-	ViewModel(parent)
+MainViewModel::MainViewModel(QObject* parent) : ViewModel(parent)
 {
 	panel = new Console;
     auto network = new UdpDataSender;
@@ -19,12 +20,64 @@ MainViewModel::MainViewModel(QObject* parent) :
     panel->injectLogger(logger);
 
     connect(network, &UdpDataSender::dataReady, panel, &Console::newData);
+    connect(network, &UdpDataSender::probeSlotsDataReady, panel, &Console::newData);
+
+    QString databasePath = QString("%1/%2").arg(qgetenv(US_HOME_PATH), _dbPath);
+    DatabaseManager manager(databasePath);
+    QList<QVariant> globalNames = manager.getProbeNames();
+
+    //probeList(QList<QVariant>({"prb A fromcpp", "prb B fromcpp"}));
+    probeList(QList<QVariant>(globalNames));
+
+    //Current Selected Probes
+    connect(this, &MainViewModel::currentSelectedProbe1Changed, [ = ]()
+    {
+        panel->selectedProbe1 = currentSelectedProbe1();
+    });
+    connect(this, &MainViewModel::currentSelectedProbe2Changed, [ = ]()
+    {
+        panel->selectedProbe2 = currentSelectedProbe2();
+    });
+    connect(this, &MainViewModel::currentSelectedProbe3Changed, [ = ]()
+    {
+        panel->selectedProbe3 = currentSelectedProbe3();
+    });
+    connect(this, &MainViewModel::currentSelectedProbe4Changed, [ = ]()
+    {
+        panel->selectedProbe4 = currentSelectedProbe4();
+    });
+
+    //Enable and disable changes in probe selection box
+    connect(panel, &Console::changeProbeSelectionEnable1, [ = ]()
+    {
+        this->isProbeSelectionEnable1(!this->isProbeSelectionEnable1());
+        this->slot1Led(this->isProbeSelectionEnable1() ? LED_COLOR_WHITE : LED_COLOR_GREEN);
+    });
+
+    connect(panel, &Console::changeProbeSelectionEnable2, [ = ]()
+    {
+        this->isProbeSelectionEnable2(!this->isProbeSelectionEnable2());
+        this->slot2Led(this->isProbeSelectionEnable2() ? LED_COLOR_WHITE : LED_COLOR_GREEN);
+    });
+
+    connect(panel, &Console::changeProbeSelectionEnable3, [ = ]()
+    {
+        this->isProbeSelectionEnable3(!this->isProbeSelectionEnable3());
+        this->slot3Led(this->isProbeSelectionEnable3() ? LED_COLOR_WHITE : LED_COLOR_GREEN);
+    });
+
+    connect(panel, &Console::changeProbeSelectionEnable4, [ = ]()
+    {
+        this->isProbeSelectionEnable4(!this->isProbeSelectionEnable4());
+        this->slot4Led(this->isProbeSelectionEnable4() ? LED_COLOR_WHITE : LED_COLOR_GREEN);
+    });
+//connect(this, );
 
     //Add Probes in 4 Slots
-//CONNECT_LED(slot1)
-//CONNECT_LED(slot2)
-//CONNECT_LED(slot3)
-//CONNECT_LED(slot4)
+    CONNECT_LED(slot1)
+    CONNECT_LED(slot2)
+    CONNECT_LED(slot3)
+    CONNECT_LED(slot4)
 
 	//Top Left
 	CONNECT_LED(patient)
diff --git a/test/TestDataSender.h b/test/TestDataSender.h
index 1915d36..f9f287b 100644
--- a/test/TestDataSender.h
+++ b/test/TestDataSender.h
@@ -7,11 +7,17 @@ class TestDataSender : public DataSender
 {
 public:
     QByteArray consoleData;
+    QByteArray slotData;
 
     void send(const QByteArray& data) override
     {
         consoleData = data;
     }
+
+    void sendProbeSlots(const QByteArray& data) override
+    {
+        slotData = data;
+    }
 };
 
 #endif //TESTDATASENDER_H
diff --git a/test/test.pro b/test/test.pro
index 0ab78d9..96364c5 100644
--- a/test/test.pro
+++ b/test/test.pro
@@ -1,5 +1,5 @@
 QT += testlib
-QT -= gui
+QT -= gui mvvmcore network sql
 
 CONFIG += qt console warn_on depend_includepath testcase
 CONFIG -= app_bundle
diff --git a/ui/emulator/elements/ProbeButton.qml b/ui/emulator/elements/ProbeButton.qml
index aa84609..0ea74f5 100644
--- a/ui/emulator/elements/ProbeButton.qml
+++ b/ui/emulator/elements/ProbeButton.qml
@@ -6,7 +6,6 @@ import "qrc:/theme"
 import "qrc:/const"
 import "qrc:/emulator/components"
 
-
 import de.skycoder42.QtMvvm.Core 1.0
 import de.skycoder42.QtMvvm.Quick 1.0
 import com.example.consoleemulator 1.0
@@ -14,6 +13,10 @@ import com.example.consoleemulator 1.0
 Button {
     id: button
 
+    width: Const.macroButton
+    height: Const.macroButton * 2
+    implicitWidth: width
+    implicitHeight: height
     //=========================================
     property var name
     property var nameLed: name + "Led"
@@ -30,9 +33,8 @@ Button {
         viewProperty: "colorMode"
         viewModelProperty: nameLed
     }
-    //=========================================
-
 
+    //=========================================
     property var image: ""
     property var radius: Math.min(width / 2, height / 2)
     property var timeToPress: 100
@@ -45,45 +47,51 @@ Button {
     signal pressed
     signal released
 
-    implicitWidth: width
-    implicitHeight: height
-
-    onPressed: { button.down = true }
-    onReleased: { button.down = false }
+    onPressed: {
+        button.down = true
+    }
+    onReleased: {
+        button.down = false
+    }
 
     function getColor() {
-        switch(colorMode) {
-        case(0): return Theme.current.none
-        case(1): return Theme.current.white
-        case(2): return Theme.current.green
-        case(3): return Theme.current.yellow
+        switch (colorMode) {
+        case (0):
+            return Theme.current.none
+        case (1):
+            return Theme.current.white
+        case (2):
+            return Theme.current.green
+        case (3):
+            return Theme.current.yellow
         }
     }
 
     function getColorGlow() {
-        switch(colorMode) {
-        case(0): return Theme.current.noneGlow
-        case(1): return Theme.current.whiteGlow
-        case(2): return Theme.current.greenGlow
-        case(3): return Theme.current.yellowGlow
+        switch (colorMode) {
+        case (0):
+            return Theme.current.noneGlow
+        case (1):
+            return Theme.current.whiteGlow
+        case (2):
+            return Theme.current.greenGlow
+        case (3):
+            return Theme.current.yellowGlow
         }
     }
 
-    width: Const.macroButton
-    height: Const.macroButton*2
-
     contentItem: Item {
         id: content
         anchors.fill: parent
         z: 1
 
         Item {
-            property var factor: button.state == "Pressed" ?
-                                     Const.imageScalePressed : Const.imageScale
+            property var factor: button.state
+                                 == "Pressed" ? Const.imageScalePressed : Const.imageScale
             property var elevator: button.state == "Pressed" ? 3 : 0
 
             anchors.horizontalCenter: parent.horizontalCenter
-            y: (parent.height * (1-factor)) / 2 + elevator
+            y: (parent.height * (1 - factor)) / 2 + elevator
             width: parent.width * factor
             height: parent.height * factor
 
@@ -127,7 +135,7 @@ Button {
         }
     }
 
-    background: Item{
+    background: Item {
         width: parent.width
         height: parent.height
 
@@ -138,7 +146,7 @@ Button {
             height: backLight.height + diffusion
             radius: width / 2
             anchors.horizontalCenter: backLight.horizontalCenter
-            y: - diffusion / 4
+            y: -diffusion / 4
             color: Theme.current.background
             border {
                 width: diffusion / 2
@@ -164,13 +172,23 @@ Button {
                 RadialGradient {
                     anchors.fill: parent
                     gradient: Gradient {
-                        GradientStop { position: 0.0; color: lightGlow }
                         GradientStop {
-                            position: 0.5 * (backLight.width - backLightGlow.diffusion / backLightGlow.width)
+                            position: 0.0
+                            color: lightGlow
+                        }
+                        GradientStop {
+                            position: 0.5 * (backLight.width - backLightGlow.diffusion
+                                             / backLightGlow.width)
                             color: lightGlow
                         }
-                        GradientStop { position: 0.5; color: "transparent" }
-                        GradientStop { position: 1.0; color: "transparent" }
+                        GradientStop {
+                            position: 0.5
+                            color: "transparent"
+                        }
+                        GradientStop {
+                            position: 1.0
+                            color: "transparent"
+                        }
                     }
                 }
             }
@@ -211,7 +229,7 @@ Button {
                 height: parent.height
                 radius: width / 2
                 color: "transparent"
-                border{
+                border {
                     color: background.color
                     width: button.border
                 }
@@ -224,8 +242,7 @@ Button {
                 anchors.fill: parent
 
                 layer.enabled: true
-                layer.effect:
-                    OpacityMask {
+                layer.effect: OpacityMask {
                     maskSource: lightRing
                 }
 
@@ -312,7 +329,7 @@ Button {
             id: hoverGlow
             width: 2 * parent.width
             height: parent.height
-            x: - 2 * parent.width
+            x: -2 * parent.width
             color: "transparent"
 
             HoverGlow {}
@@ -349,7 +366,8 @@ Button {
 
     transitions: [
         Transition {
-            from: ""; to: "Hovering"
+            from: ""
+            to: "Hovering"
             NumberAnimation {
                 properties: "x"
                 duration: 500
@@ -358,4 +376,3 @@ Button {
         }
     ]
 }
-
diff --git a/ui/emulator/items/DropDownWithDisable.qml b/ui/emulator/items/DropDownWithDisable.qml
new file mode 100644
index 0000000..fe88386
--- /dev/null
+++ b/ui/emulator/items/DropDownWithDisable.qml
@@ -0,0 +1,46 @@
+import QtQuick 2.0
+import QtQuick.Layouts 1.13
+import QtQuick.Controls 2.12
+import de.skycoder42.QtMvvm.Core 1.0
+import de.skycoder42.QtMvvm.Quick 1.0
+import com.example.consoleemulator 1.0
+
+import "qrc:/emulator/elements"
+import "qrc:/emulator/components"
+import "qrc:/const"
+import "qrc:/qtmvvm/views"
+
+Item {
+    id: root
+    implicitWidth: width
+    implicitHeight: 25
+    property var isDisable: false
+    property var viewModelProperty
+    property var isProbeEnableProperty
+    property alias model: idComobBox.model
+    ComboBox {
+        id: idComobBox
+        visible: isDisable
+        model: probeList
+        width: parent.width
+        implicitWidth: width
+        implicitHeight: parent.height
+        MvvmBinding {
+            viewModel: mainView.viewModel
+            viewProperty: "currentIndex"
+            viewModelProperty: root.viewModelProperty
+        }
+    }
+    Text {
+        visible: !isDisable
+        text: idComobBox.currentText
+        anchors.fill: parent
+        horizontalAlignment: Text.AlignHCenter
+    }
+
+    MvvmBinding {
+        viewModel: mainView.viewModel
+        viewProperty: "isDisable"
+        viewModelProperty: isProbeEnableProperty
+    }
+}
diff --git a/ui/emulator/items/TopLeftTop.qml b/ui/emulator/items/TopLeftTop.qml
index 34462ab..56a55b9 100644
--- a/ui/emulator/items/TopLeftTop.qml
+++ b/ui/emulator/items/TopLeftTop.qml
@@ -11,77 +11,84 @@ import "qrc:/const"
 import "qrc:/qtmvvm/views"
 
 GridLayout {
-    x: 70
+    x: 20
     y: 50
-    rowSpacing: 36
+    rowSpacing: 30
     columns: 4
 
-    ProbeButton {
-        name: "probe1"
-        image: "qrc:/icons/topLeft/probe.png"
+    property var widthOfBtns: 130
+    property var probeList: []
+
+    Item {
+        Layout.fillWidth: true
+        implicitHeight: Const.macroButton * 2
+        ProbeButton {
+            anchors.centerIn: parent
+            implicitWidth: width * 1.25
+            name: "slot4"
+            image: "qrc:/icons/topLeft/probe.png"
+        }
     }
-    ProbeButton {
-        name: "probe2"
-        image: "qrc:/icons/topLeft/probe.png"
+    Item {
+        Layout.fillWidth: true
+        implicitHeight: Const.macroButton * 2
+        ProbeButton {
+            anchors.centerIn: parent
+            implicitWidth: width * 1.25
+            name: "slot3"
+            image: "qrc:/icons/topLeft/probe.png"
+        }
     }
-    ProbeButton {
-        name: "probe3"
-        image: "qrc:/icons/topLeft/probe.png"
+    Item {
+        Layout.fillWidth: true
+        implicitHeight: Const.macroButton * 2
+        ProbeButton {
+            anchors.centerIn: parent
+            implicitWidth: width * 1.25
+            name: "slot2"
+            image: "qrc:/icons/topLeft/probe.png"
+        }
     }
-    ProbeButton {
-        name: "probe4"
-        image: "qrc:/icons/topLeft/probe.png"
+    Item {
+        Layout.fillWidth: true
+        implicitHeight: Const.macroButton * 2
+        ProbeButton {
+            anchors.centerIn: parent
+            implicitWidth: width * 1.25
+            name: "slot1"
+            image: "qrc:/icons/topLeft/probe.png"
+        }
     }
-    property var widthOfBtns: 130
-    property var probeList: []
 
     MvvmBinding {
         viewModel: mainView.viewModel
         viewProperty: "probeList"
         viewModelProperty: "probeList"
     }
-    ComboBox {
+
+    DropDownWithDisable {
+        viewModelProperty: "currentSelectedProbe4"
         model: probeList
         width: widthOfBtns
-        implicitWidth: width
-        implicitHeight: 25
-        MvvmBinding {
-            viewModel: mainView.viewModel
-            viewProperty: "currentIndex"
-            viewModelProperty: "currentSelectedProbe1"
-        }
+        isProbeEnableProperty: "isProbeSelectionEnable4"
     }
-    ComboBox {
+
+    DropDownWithDisable {
+        viewModelProperty: "currentSelectedProbe3"
         model: probeList
         width: widthOfBtns
-        implicitWidth: width
-        implicitHeight: 25
-        MvvmBinding {
-            viewModel: mainView.viewModel
-            viewProperty: "currentIndex"
-            viewModelProperty: "currentSelectedProbe2"
-        }
+        isProbeEnableProperty: "isProbeSelectionEnable3"
     }
-    ComboBox {
+    DropDownWithDisable {
+        viewModelProperty: "currentSelectedProbe2"
         model: probeList
         width: widthOfBtns
-        implicitWidth: width
-        implicitHeight: 25
-        MvvmBinding {
-            viewModel: mainView.viewModel
-            viewProperty: "currentIndex"
-            viewModelProperty: "currentSelectedProbe3"
-        }
+        isProbeEnableProperty: "isProbeSelectionEnable2"
     }
-    ComboBox {
+    DropDownWithDisable {
+        viewModelProperty: "currentSelectedProbe1"
         model: probeList
         width: widthOfBtns
-        implicitWidth: width
-        implicitHeight: 25
-        MvvmBinding {
-            viewModel: mainView.viewModel
-            viewProperty: "currentIndex"
-            viewModelProperty: "currentSelectedProbe4"
-        }
+        isProbeEnableProperty: "isProbeSelectionEnable1"
     }
 }
diff --git a/ui/ui.pro b/ui/ui.pro
index 454f661..28feafa 100644
--- a/ui/ui.pro
+++ b/ui/ui.pro
@@ -1,6 +1,6 @@
 TEMPLATE = app
 
-QT += quick mvvmquick
+QT += quick mvvmquick network sql
 CONFIG += c++14
 
 TARGET = ConsoleEmulator
diff --git a/ui/ui.qrc b/ui/ui.qrc
index d7f0fdb..cd95bb2 100644
--- a/ui/ui.qrc
+++ b/ui/ui.qrc
@@ -97,6 +97,7 @@
         <file>emulator/items/Setting.qml</file>
         <file>emulator/items/TopLeftTop.qml</file>
         <file>emulator/elements/ProbeButton.qml</file>
+        <file>emulator/items/DropDownWithDisable.qml</file>
     </qresource>
     <qresource prefix="/qtmvvm/views">
         <file>MainView.qml</file>