diff --git a/.idea/modules.xml b/.idea/modules.xml
index 0ddf669..cf4f13d 100644
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@@ -2,6 +2,7 @@
 <project version="4">
   <component name="ProjectModuleManager">
     <modules>
+      <module fileurl="file://$PROJECT_DIR$/BTDemo.iml" filepath="$PROJECT_DIR$/BTDemo.iml" />
       <module fileurl="file://D:\Project\ble-android-demo\BTDemo.iml" filepath="D:\Project\ble-android-demo\BTDemo.iml" />
       <module fileurl="file://$PROJECT_DIR$/app/app.iml" filepath="$PROJECT_DIR$/app/app.iml" />
       <module fileurl="file://D:\Project\ble-android-demo\app\app.iml" filepath="D:\Project\ble-android-demo\app\app.iml" />
diff --git a/app/build.gradle b/app/build.gradle
index 4af6b23..3b1e2a8 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -32,4 +32,5 @@ dependencies {
     androidTestImplementation 'com.android.support.test:runner:1.0.0'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.0'
     implementation 'org.apache.commons:commons-lang3:3.6'
+    implementation 'com.journeyapps:zxing-android-embedded:3.5.0'
 }
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index e6016bb..4385ca4 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -6,6 +6,7 @@
     <uses-permission android:name="android.permission.BLUETOOTH" />
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
+    <uses-permission android:name="android.permission.CAMERA"/>
 
     <application
         android:allowBackup="true"
diff --git a/app/src/main/java/xyz/mtfos/btdemo/MainActivity.kt b/app/src/main/java/xyz/mtfos/btdemo/MainActivity.kt
index ccc2f94..12a9df7 100644
--- a/app/src/main/java/xyz/mtfos/btdemo/MainActivity.kt
+++ b/app/src/main/java/xyz/mtfos/btdemo/MainActivity.kt
@@ -3,11 +3,16 @@ package xyz.mtfos.btdemo
 import android.Manifest
 import android.annotation.SuppressLint
 import android.app.Activity
+import android.content.Intent
 import android.content.pm.PackageManager
 import android.os.Build
 import android.os.Bundle
 import android.os.Handler
+import android.text.Editable
 import android.widget.*
+import com.google.zxing.integration.android.IntentIntegrator
+import com.google.zxing.integration.android.IntentResult
+import org.json.JSONObject
 import xyz.mtfos.btdemo.objectTool.bind
 
 /**
@@ -26,6 +31,11 @@ class MainActivity : Activity() {
     val alignBtn: Button by bind(R.id.btn_align)
     val sizeBtn: Button by bind(R.id.btn_size)
 
+    val inmac: EditText by bind(R.id.inmac)
+    val inservice: EditText by bind(R.id.inservice)
+    val incharacteristic: EditText by bind(R.id.incharacteristic)
+    val scanSetting: Button by bind(R.id.scansetting)
+
     val addHR: Button by bind(R.id.addHR)
     val addNL: Button by bind(R.id.addNL)
     val addTAB: Button by bind(R.id.addTAB)
@@ -51,7 +61,7 @@ class MainActivity : Activity() {
         connectBtn.isEnabled = true
         disconnectBtn.isEnabled = false
 
-        ble = PrinterBle(this@MainActivity, "B8:27:EB:21:C2:1A", "dd535b71-8f05-4e30-beb0-6fa7ea3dfc3e", "00000001-8f05-4e30-beb0-6fa7ea3dfc3e")
+        ble = PrinterBle(this@MainActivity)
 
         ble?.setOnStateChangeListener {
             System.out.println("Now State is >>>> " + it)
@@ -76,6 +86,10 @@ class MainActivity : Activity() {
             }
         }
 
+        scanSetting.setOnClickListener {
+            IntentIntegrator(this@MainActivity).initiateScan()
+        }
+
         ble?.setOnNotifyListener {
             System.out.println("Get Notify :::::: " + it)
         }
@@ -107,8 +121,9 @@ class MainActivity : Activity() {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             permissionCheck += this@MainActivity.checkSelfPermission(android.Manifest.permission.ACCESS_COARSE_LOCATION)
             permissionCheck += this@MainActivity.checkSelfPermission(android.Manifest.permission.ACCESS_FINE_LOCATION)
+            permissionCheck += this@MainActivity.checkSelfPermission(android.Manifest.permission.CAMERA)
             if (permissionCheck != 0) {
-                requestPermissions(arrayOf(Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION), 111)
+                requestPermissions(arrayOf(Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.CAMERA), 111)
             }
         }
 
@@ -138,6 +153,9 @@ class MainActivity : Activity() {
         }
 
         connectBtn.setOnClickListener {
+            ble?.macAddr = inmac.text.toString()
+            ble?.serviceUUID = inservice.text.toString()
+            ble?.characteristicUUID = incharacteristic.text.toString()
             scanConnect()
         }
         disconnectBtn.setOnClickListener {
@@ -149,6 +167,32 @@ class MainActivity : Activity() {
         super.onRequestPermissionsResult(requestCode, permissions, grantResults)
     }
 
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        val qrRes: IntentResult? = IntentIntegrator.parseActivityResult(requestCode, resultCode, data)
+        if (qrRes != null) {
+            val content: String? = qrRes?.contents
+            if (content != null) {
+                System.out.println("GET QRCODE :: $content")
+                try {
+                    val json: JSONObject = JSONObject(content)
+                     if(json.has("mac") && json["mac"] is String){
+                         inmac.text = Editable.Factory.getInstance().newEditable(json.getString("mac"))
+                     }
+                    if(json.has("service") && json["service"] is String) {
+                        inservice.text = Editable.Factory.getInstance().newEditable(json.getString("service"))
+                    }
+                    if(json.has("characteristic") && json["characteristic"] is String) {
+                        incharacteristic.text = Editable.Factory.getInstance().newEditable(json.getString("characteristic"))
+                    }
+                } catch (e: Exception) {
+                    e.printStackTrace()
+                    Toast.makeText(this@MainActivity, "Parser Error", Toast.LENGTH_SHORT).show()
+                }
+            }
+        }
+    }
+
     override fun onStop() {
         super.onStop()
         disconnect()
diff --git a/app/src/main/java/xyz/mtfos/btdemo/PrinterBle.java b/app/src/main/java/xyz/mtfos/btdemo/PrinterBle.java
index b74826c..93f5cba 100644
--- a/app/src/main/java/xyz/mtfos/btdemo/PrinterBle.java
+++ b/app/src/main/java/xyz/mtfos/btdemo/PrinterBle.java
@@ -89,6 +89,10 @@ public class PrinterBle {
         void onNotify(String msg);
     }
 
+    public PrinterBle(Context ctx) {
+        this(ctx, "", "", "");
+    }
+
     public PrinterBle(Context ctx, String macAddr, String serviceUUID, String characteristicUUID) {
         this.ctx = ctx;
         this.macAddr = macAddr;
@@ -127,9 +131,9 @@ public class PrinterBle {
         @Override
         public void onServicesDiscovered(BluetoothGatt gatt, int status) {
             super.onServicesDiscovered(gatt, status);
-            if (status == BluetoothGatt.GATT_SUCCESS) {
+            if (status == BluetoothGatt.GATT_SUCCESS && !serviceUUID.isEmpty()) {
                 BluetoothGattService btService = mBtGatt.getService(UUID.fromString(serviceUUID));
-                if (btService != null) {
+                if (btService != null && !characteristicUUID.isEmpty()) {
                     printerCharacteristic = btService.getCharacteristic(UUID.fromString(characteristicUUID));
                     // set notify enable
                     mBtGatt.setCharacteristicNotification(printerCharacteristic, true);
@@ -242,7 +246,7 @@ public class PrinterBle {
     };
 
     public void startScan() {
-        if (mAdapter == null) return;
+        if (mAdapter == null || macAddr.isEmpty() || serviceUUID.isEmpty() || characteristicUUID.isEmpty()) return;
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP && mLeScanner == null) return;
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
@@ -439,6 +443,30 @@ public class PrinterBle {
         return this;
     }
 
+    public String getMacAddr() {
+        return macAddr;
+    }
+
+    public void setMacAddr(String macAddr) {
+        this.macAddr = macAddr;
+    }
+
+    public String getServiceUUID() {
+        return serviceUUID;
+    }
+
+    public void setServiceUUID(String serviceUUID) {
+        this.serviceUUID = serviceUUID;
+    }
+
+    public String getCharacteristicUUID() {
+        return characteristicUUID;
+    }
+
+    public void setCharacteristicUUID(String characteristicUUID) {
+        this.characteristicUUID = characteristicUUID;
+    }
+
     public ArrayList<String> getDataQueue() {
         return dataQueue;
     }
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 4e1b4e2..e7ba341 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -4,6 +4,78 @@
     android:layout_height="match_parent"
     android:orientation="vertical">
 
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="BTMac:" />
+
+            <EditText
+                android:id="@+id/inmac"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:hint="input bluetooth mac" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="BTService:" />
+
+            <EditText
+                android:id="@+id/inservice"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:hint="input service uuid" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="BTCharacteristic:" />
+
+            <EditText
+                android:id="@+id/incharacteristic"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:hint="input characteristic uuid" />
+        </LinearLayout>
+
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:gravity="right"
+            android:orientation="horizontal">
+
+            <Button
+                android:id="@+id/scansetting"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="scanSetting"
+                android:textAllCaps="false" />
+        </LinearLayout>
+    </LinearLayout>
+
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -24,139 +96,140 @@
             android:textAllCaps="false" />
     </LinearLayout>
 
-    <LinearLayout
-        android:id="@+id/mainlay"
+    <ScrollView
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:orientation="vertical">
+        android:layout_height="match_parent">
 
         <LinearLayout
+            android:id="@+id/mainlay"
             android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:orientation="horizontal">
+            android:layout_height="match_parent"
+            android:orientation="vertical">
 
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="match_parent"
-                android:gravity="center"
-                android:text="Align: " />
-
-            <android.support.v7.widget.AppCompatSpinner
-                android:id="@+id/align"
-                android:layout_width="wrap_content"
-                android:layout_height="match_parent" />
-
-            <Button
-                android:id="@+id/btn_align"
-                android:layout_width="wrap_content"
-                android:layout_height="match_parent"
-                android:text="Write"
-                android:textAllCaps="false" />
-
-        </LinearLayout>
-
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:orientation="horizontal">
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="match_parent"
-                android:gravity="center"
-                android:text="Size: " />
-
-            <android.support.v7.widget.AppCompatSpinner
-                android:id="@+id/size"
-                android:layout_width="wrap_content"
-                android:layout_height="match_parent" />
-
-            <Button
-                android:id="@+id/btn_size"
-                android:layout_width="wrap_content"
-                android:layout_height="match_parent"
-                android:text="Write"
-                android:textAllCaps="false" />
-
-        </LinearLayout>
-
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:orientation="horizontal">
-
-            <Button
-                android:id="@+id/addHR"
-                android:layout_width="wrap_content"
+            <LinearLayout
+                android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:text="分隔線" />
+                android:orientation="horizontal">
 
-            <Button
-                android:id="@+id/addNL"
-                android:layout_width="wrap_content"
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="match_parent"
+                    android:gravity="center"
+                    android:text="Align: " />
+
+                <android.support.v7.widget.AppCompatSpinner
+                    android:id="@+id/align"
+                    android:layout_width="wrap_content"
+                    android:layout_height="match_parent" />
+
+                <Button
+                    android:id="@+id/btn_align"
+                    android:layout_width="wrap_content"
+                    android:layout_height="match_parent"
+                    android:text="Write"
+                    android:textAllCaps="false" />
+
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:text="換行" />
+                android:orientation="horizontal">
 
-            <Button
-                android:id="@+id/addTAB"
-                android:layout_width="wrap_content"
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="match_parent"
+                    android:gravity="center"
+                    android:text="Size: " />
+
+                <android.support.v7.widget.AppCompatSpinner
+                    android:id="@+id/size"
+                    android:layout_width="wrap_content"
+                    android:layout_height="match_parent" />
+
+                <Button
+                    android:id="@+id/btn_size"
+                    android:layout_width="wrap_content"
+                    android:layout_height="match_parent"
+                    android:text="Write"
+                    android:textAllCaps="false" />
+
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:text="TAB" />
-        </LinearLayout>
+                android:orientation="horizontal">
+
+                <Button
+                    android:id="@+id/addHR"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="分隔線" />
+
+                <Button
+                    android:id="@+id/addNL"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="換行" />
+
+                <Button
+                    android:id="@+id/addTAB"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="TAB" />
+            </LinearLayout>
 
 
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:orientation="horizontal">
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal">
 
-            <EditText
-                android:id="@+id/intxt"
+                <EditText
+                    android:id="@+id/intxt"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:hint="輸入傳送字串" />
+
+                <Button
+                    android:id="@+id/addTXT"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="addTXT"
+                    android:textAllCaps="false" />
+
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical">
+
+                <Button
+                    android:id="@+id/bt"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="Send"
+                    android:textAllCaps="false" />
+            </LinearLayout>
+
+            <LinearLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
-                android:hint="輸入傳送字串" />
+                android:orientation="vertical">
 
-            <Button
-                android:id="@+id/addTXT"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="addTXT"
-                android:textAllCaps="false" />
-
-        </LinearLayout>
-
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:orientation="vertical">
-
-            <Button
-                android:id="@+id/bt"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="Send"
-                android:textAllCaps="false" />
-        </LinearLayout>
-
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:orientation="vertical">
-
-            <ScrollView
-                android:layout_width="match_parent"
-                android:layout_height="match_parent">
 
                 <TextView
                     android:id="@+id/preview"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content" />
 
-            </ScrollView>
+
+            </LinearLayout>
+
         </LinearLayout>
-
-    </LinearLayout>
-
+    </ScrollView>
 </LinearLayout>