diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
index df085d41..3407a6b7 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
@@ -145,9 +145,15 @@ public class MpMasterService extends Service {
     private String mIccid1 = null;
     private String mIccid2 = null;
 
+    public final static int BROADCAST_REQUEST_CODE_NOTIFICATION = 11;
+    public final static int BROADCAST_REQUEST_CODE_NOTIFICATION_STOP = 12;
+    public final static int BROADCAST_REQUEST_CODE_HEARTBEAT = 15;
+    public final static int BROADCAST_REQUEST_CODE_REAL_HEARTBEAT = 16;
+    public final static int BROADCAST_REQUEST_CODE_SYS_KEEPALIVE = 17;
+    public final static int BROADCAST_REQUEST_CODE_RELAUNCH = 18;
+
     //用于创建单例线程保证该线程在项目中唯一
     private static final AtomicBoolean created = new AtomicBoolean(false);
-    AtomicInteger reqCode = new AtomicInteger(0);
 
     public MpMasterService() {
     }
@@ -157,8 +163,7 @@ public class MpMasterService extends Service {
         final Context context = getApplicationContext();
         try {
             Intent intent = new Intent(this, MainActivity.class);
-            int uniqueReqCode = reqCode.getAndIncrement();
-            PendingIntent pi = PendingIntent.getActivity(this, uniqueReqCode, intent, 0);
+            PendingIntent pi = PendingIntent.getActivity(this, BROADCAST_REQUEST_CODE_RELAUNCH, intent, 0);
             AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
             alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 5000, pi);
             logger.info("Restart MpApp after 5s as for LowMemory");
@@ -857,8 +862,8 @@ public class MpMasterService extends Service {
         if (keepAlive) {
             alarmIntent.putExtra("keepAlive", keepAlive);
         }
-//        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, uniqueReqCode, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);
-        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, keepAlive ? 0 : 1, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);
+        int reqCode = keepAlive ? BROADCAST_REQUEST_CODE_HEARTBEAT : BROADCAST_REQUEST_CODE_REAL_HEARTBEAT;
+        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, reqCode, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);
 
         Date dt = new Date(triggerTime);
 
@@ -870,6 +875,16 @@ public class MpMasterService extends Service {
         mPreviousHB = pendingIntent;
         mPreviousHeartbeatTime = triggerTime;
         alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, triggerTime, pendingIntent);
+
+        Intent relaunchIntent = new Intent();
+        relaunchIntent.putExtra("cmd", "forceLaunch");
+        relaunchIntent.putExtra("pkname", MicroPhotoContext.PACKAGE_NAME_MPMASTER);
+        relaunchIntent.setAction("com.xy.xsetting.action");
+        relaunchIntent.setPackage("com.android.systemui");
+        // getApplicationContext().sendBroadcast(restartIntent);
+
+        PendingIntent sysKAPendingIntent = PendingIntent.getBroadcast(this, BROADCAST_REQUEST_CODE_SYS_KEEPALIVE, relaunchIntent, PendingIntent.FLAG_UPDATE_CURRENT);
+        alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, SystemClock.elapsedRealtime() + (mHeartbeatDuration + 2) * 1000, sysKAPendingIntent);
     }
 
     @Override
@@ -967,14 +982,12 @@ public class MpMasterService extends Service {
             notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
         }*/
 
-        int uniqueReqCode = reqCode.getAndIncrement();
-        PendingIntent pendingIntent = PendingIntent.getActivity(this, uniqueReqCode, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
+        PendingIntent pendingIntent = PendingIntent.getActivity(this, BROADCAST_REQUEST_CODE_NOTIFICATION, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
 
         // make a stop intent
         Intent stopIntent = new Intent(this, MpMasterService.class);
         stopIntent.setAction(ACTION_STOP);
-        uniqueReqCode = reqCode.getAndIncrement();
-        PendingIntent pendingStopIntent = PendingIntent.getService(this, uniqueReqCode, stopIntent, PendingIntent.FLAG_UPDATE_CURRENT);
+        PendingIntent pendingStopIntent = PendingIntent.getService(this, BROADCAST_REQUEST_CODE_NOTIFICATION_STOP, stopIntent, PendingIntent.FLAG_UPDATE_CURRENT);
         RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.notification);
         remoteViews.setOnClickPendingIntent(R.id.btn_stop, pendingStopIntent);