diff --git a/mpmaster/build.gradle b/mpmaster/build.gradle
index b3a3d095..4d6cfa15 100644
--- a/mpmaster/build.gradle
+++ b/mpmaster/build.gradle
@@ -30,10 +30,14 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
+
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+    buildFeatures {
+        viewBinding true
+    }
 }
 
 dependencies {
diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/MainActivity.java b/mpmaster/src/main/java/com/xypower/mpmaster/MainActivity.java
index 86ef30c3..7cb7f110 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/MainActivity.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/MainActivity.java
@@ -8,12 +8,16 @@ import android.content.Intent;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.StrictMode;
+import android.view.View;
 
+
+import com.dev.devapi.api.SysApi;
 import com.xypower.common.MicroPhotoContext;
 
 import java.text.SimpleDateFormat;
 import java.util.Date;
 
+
 public class MainActivity extends AppCompatActivity {
 
     @Override
@@ -32,6 +36,34 @@ public class MainActivity extends AppCompatActivity {
         StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
         StrictMode.setThreadPolicy(policy);
 
+        findViewById(R.id.btnEnableCam3V3).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                SysApi.setCam3V3Enable(true);
+            }
+        });
+
+        findViewById(R.id.btnDisableCam3V3).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                SysApi.setCam3V3Enable(false);
+            }
+        });
+
+        findViewById(R.id.btnTurnOtgOn).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                SysApi.setOtgState(true);
+            }
+        });
+
+        findViewById(R.id.btnTurnOtgOff).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                SysApi.setOtgState(false);
+            }
+        });
+
         startMicroPhotoService(getApplicationContext());
     }
 
diff --git a/mpmaster/src/main/res/layout/activity_main.xml b/mpmaster/src/main/res/layout/activity_main.xml
index 17eab17b..0137320f 100644
--- a/mpmaster/src/main/res/layout/activity_main.xml
+++ b/mpmaster/src/main/res/layout/activity_main.xml
@@ -10,9 +10,42 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="Hello World!"
+        android:visibility="gone"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
+    <Button
+        android:id="@+id/btnEnableCam3V3"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Cam3V3 On"
+        tools:layout_editor_absoluteX="47dp"
+        tools:layout_editor_absoluteY="137dp" />
+
+    <Button
+        android:id="@+id/btnDisableCam3V3"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Cam3V3 Off"
+        tools:layout_editor_absoluteX="201dp"
+        tools:layout_editor_absoluteY="130dp" />
+
+    <Button
+        android:id="@+id/btnTurnOtgOn"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="OTG On"
+        tools:layout_editor_absoluteX="51dp"
+        tools:layout_editor_absoluteY="246dp" />
+
+    <Button
+        android:id="@+id/btnTurnOtgOff"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="OTG Off"
+        tools:layout_editor_absoluteX="201dp"
+        tools:layout_editor_absoluteY="242dp" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file