diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 9e04b25..c5fc71d 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -77,11 +77,11 @@
           </provider>
         </entry>
       </file>
-      <file leaf-file-name="Controller.java" pinned="false" current-in-tab="true">
+      <file leaf-file-name="Controller.java" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/sample/Controller.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="191">
-              <caret line="162" column="74" lean-forward="false" selection-start-line="162" selection-start-column="74" selection-end-line="162" selection-end-column="74" />
+            <state relative-caret-position="616">
+              <caret line="169" column="9" lean-forward="true" selection-start-line="169" selection-start-column="9" selection-end-line="169" selection-end-column="9" />
               <folding>
                 <element signature="imports" expanded="true" />
               </folding>
@@ -109,8 +109,8 @@
       <file leaf-file-name="Port.java" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/sample/Port.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="-1186">
-              <caret line="91" column="23" lean-forward="true" selection-start-line="91" selection-start-column="23" selection-end-line="91" selection-end-column="23" />
+            <state relative-caret-position="-897">
+              <caret line="99" column="0" lean-forward="true" selection-start-line="99" selection-start-column="0" selection-end-line="99" selection-end-column="0" />
               <folding>
                 <element signature="imports" expanded="true" />
               </folding>
@@ -118,7 +118,7 @@
           </provider>
         </entry>
       </file>
-      <file leaf-file-name="sample.fxml" pinned="false" current-in-tab="false">
+      <file leaf-file-name="sample.fxml" pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/src/sample/sample.fxml">
           <provider editor-type-id="JavaFX-Scene-Builder">
             <state />
@@ -853,17 +853,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/sample/sample.fxml">
-      <provider editor-type-id="JavaFX-Scene-Builder">
-        <state />
-      </provider>
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="-77">
-          <caret line="65" column="98" lean-forward="false" selection-start-line="65" selection-start-column="98" selection-end-line="65" selection-end-column="98" />
-          <folding />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/src/sample/Commend.java">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="-115">
@@ -881,8 +870,8 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/src/sample/Port.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="-1186">
-          <caret line="91" column="23" lean-forward="true" selection-start-line="91" selection-start-column="23" selection-end-line="91" selection-end-column="23" />
+        <state relative-caret-position="-897">
+          <caret line="99" column="0" lean-forward="true" selection-start-line="99" selection-start-column="0" selection-end-line="99" selection-end-column="0" />
           <folding>
             <element signature="imports" expanded="true" />
           </folding>
@@ -891,14 +880,25 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/src/sample/Controller.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="191">
-          <caret line="162" column="74" lean-forward="false" selection-start-line="162" selection-start-column="74" selection-end-line="162" selection-end-column="74" />
+        <state relative-caret-position="616">
+          <caret line="169" column="9" lean-forward="true" selection-start-line="169" selection-start-column="9" selection-end-line="169" selection-end-column="9" />
           <folding>
             <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/src/sample/sample.fxml">
+      <provider editor-type-id="JavaFX-Scene-Builder">
+        <state />
+      </provider>
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="-77">
+          <caret line="65" column="98" lean-forward="false" selection-start-line="65" selection-start-column="98" selection-end-line="65" selection-end-column="98" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
   </component>
   <component name="masterDetails">
     <states>
diff --git a/out/artifacts/KCC_App_jar/KCC_App.jar b/out/artifacts/KCC_App_jar/KCC_App.jar
index 63b8ef3..54f06d0 100644
Binary files a/out/artifacts/KCC_App_jar/KCC_App.jar and b/out/artifacts/KCC_App_jar/KCC_App.jar differ
diff --git a/out/production/KCC_App/sample/Controller.class b/out/production/KCC_App/sample/Controller.class
index 0541fa1..c6c4c4d 100644
Binary files a/out/production/KCC_App/sample/Controller.class and b/out/production/KCC_App/sample/Controller.class differ
diff --git a/src/sample/Controller.java b/src/sample/Controller.java
index f04d03e..ae7f7c1 100644
--- a/src/sample/Controller.java
+++ b/src/sample/Controller.java
@@ -131,6 +131,8 @@ public void onOpen(ActionEvent actionEvent) {
                 Port.getInstance().open(comPort);
                 openBtn.setText("CLOSE");
                 startBtn.setDisable(false);
+                internal.setDisable(false);
+                external.setDisable(false);
             }
             else{
                 Alert alert = new Alert(Alert.AlertType.ERROR);
@@ -144,6 +146,8 @@ public void onOpen(ActionEvent actionEvent) {
                 Port.getInstance().close();
                 openBtn.setText("OPEN");
                 startBtn.setDisable(true);
+                internal.setDisable(true);
+                internal.setDisable(true);
         }
     }
 
@@ -153,6 +157,8 @@ public void initialize(URL location, ResourceBundle resources) {
         external.setToggleGroup(group);
         internal.setSelected(true);
         startBtn.setDisable(true);
+        internal.setDisable(true);
+        external.setDisable(true);
     }
 
     public void onChooseMode(ActionEvent actionEvent) {