diff --git a/app_dashboard/build.gradle b/app_dashboard/build.gradle
index 4c3b700..75c66f4 100644
--- a/app_dashboard/build.gradle
+++ b/app_dashboard/build.gradle
@@ -19,7 +19,6 @@ android {
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
 
-
     // sign the application
     signingConfigs {
         release {
@@ -51,7 +50,6 @@ android {
         viewBinding true
     }
 
-
     android.applicationVariants.all { variant ->
         def docDir = rootProject.getRootDir().getAbsolutePath() + "/../apk/dashboard"
         def releaseDir = rootProject.getRootDir().getAbsolutePath() + "/../apk/dashboard"
diff --git a/app_dashboard/src/main/java/cn/ykbox/dashboard/activity/BuildingDashboardActivity.java b/app_dashboard/src/main/java/cn/ykbox/dashboard/activity/BuildingDashboardActivity.java
index 1fcc5ae..0c9834b 100644
--- a/app_dashboard/src/main/java/cn/ykbox/dashboard/activity/BuildingDashboardActivity.java
+++ b/app_dashboard/src/main/java/cn/ykbox/dashboard/activity/BuildingDashboardActivity.java
@@ -33,6 +33,7 @@ import java.util.Calendar;
 import cn.ykbox.dashboard.ConfigReader;
 import cn.ykbox.dashboard.databinding.ActivityBuildingDashboardBinding;
 import cn.ykbox.dashboard.receiver.CommandBroadcastReceiver;
+import cn.ykbox.dashboard.serial.SerialControlDevices;
 
 public class BuildingDashboardActivity extends FullscreenActivity {
     private final static String TAG = "DashboardActivity";
diff --git a/app_dashboard/src/main/java/cn/ykbox/dashboard/activity/FullscreenActivity.java b/app_dashboard/src/main/java/cn/ykbox/dashboard/activity/FullscreenActivity.java
index 0ed32c8..860948a 100644
--- a/app_dashboard/src/main/java/cn/ykbox/dashboard/activity/FullscreenActivity.java
+++ b/app_dashboard/src/main/java/cn/ykbox/dashboard/activity/FullscreenActivity.java
@@ -110,7 +110,7 @@ public class FullscreenActivity extends AppCompatActivity {
             hide();
         } else {
             show();
-            delayedHide(30000);
+            delayedHide(20000);
         }
     }
 
diff --git a/app_dashboard/src/main/java/cn/ykbox/dashboard/activity/StartActivity.java b/app_dashboard/src/main/java/cn/ykbox/dashboard/activity/StartActivity.java
index 87934dc..8390669 100644
--- a/app_dashboard/src/main/java/cn/ykbox/dashboard/activity/StartActivity.java
+++ b/app_dashboard/src/main/java/cn/ykbox/dashboard/activity/StartActivity.java
@@ -12,6 +12,7 @@ import androidx.core.view.ViewCompat;
 import androidx.core.view.WindowInsetsCompat;
 
 import cn.ykbox.dashboard.R;
+import cn.ykbox.dashboard.serial.SerialControlDevices;
 
 public class StartActivity extends AppCompatActivity {
     private Context mContext;
@@ -19,6 +20,10 @@ public class StartActivity extends AppCompatActivity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+
+        // 开机后手动发送一次开启电源指令
+        SerialControlDevices.sendCommand("/dev/ttyS2", 9600, "ACEAB400ED");
+
         mContext = this;
         EdgeToEdge.enable(this);
         setContentView(R.layout.activity_start);
@@ -39,4 +44,5 @@ public class StartActivity extends AppCompatActivity {
             }
         }, 3000);
     }
+
 }
\ No newline at end of file