diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
index 70683c10..1030a698 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
@@ -55,6 +55,7 @@ import java.util.List;
 import java.util.concurrent.ExecutionException;
 import java.util.logging.Level;
 import java.util.logging.Logger;
+import java.util.concurrent.atomic.AtomicInteger;;
 
 public class MpMasterService extends Service {
     static {
@@ -141,6 +142,8 @@ public class MpMasterService extends Service {
     private String mIccid1 = null;
     private String mIccid2 = null;
 
+    AtomicInteger reqCode = new AtomicInteger(0);
+
     public MpMasterService() {
     }
 
@@ -149,7 +152,8 @@ public class MpMasterService extends Service {
         final Context context = getApplicationContext();
         try {
             Intent intent = new Intent(this, MainActivity.class);
-            PendingIntent pi = PendingIntent.getActivity(this,0, intent,0);
+            int uniqueReqCode = reqCode.getAndIncrement();
+            PendingIntent pi = PendingIntent.getActivity(this,uniqueReqCode, 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");
@@ -420,11 +424,11 @@ public class MpMasterService extends Service {
 
                     logger.warning("Restart MpAPP as it is NOT Running Prev MPAPP HB=" +
                             Long.toString((ts - mPreviousMpHbTime) / 1000) + " MPAPP HBDuration=" + Long.toString(mMpHeartbeatDuration)
-                            + " Prev MpRestart Time=" + Long.toString(mTimeToStartMpApp));
+                            + " Prev MpRestart Time=" + Long.toString(mTimeToStartMpApp) + " last MPAPPHB =" + (mPreviousMpHbTime/1000));
 
                     mTimeToStartMpApp = ts;
                 } else {
-                    logger.warning("MpAPP has restarted during 30s, skip the check.");
+                    logger.warning("MpAPP has restarted during 30min, skip the check.");
                 }
                 return;
             }
@@ -451,7 +455,8 @@ public class MpMasterService extends Service {
                     alarmIntent.setAction(ACTION_MP_RESTART);
                     alarmIntent.putExtra("reason", msg);
 
-                    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);
+                    int uniqueReqCode = reqCode.getAndIncrement();
+                    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, uniqueReqCode, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);
 
                     alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, ts + mDelayedRestartMpTime, pendingIntent);
 
@@ -655,7 +660,7 @@ public class MpMasterService extends Service {
                     mService.mMpHeartbeatDuration = hbDuration > 0 ? hbDuration : 600000;
                 }
                 mService.mPreviousMpHbTime = intent.getLongExtra("HeartbeatTime", System.currentTimeMillis());
-                mService.logger.info("Heartbeat Timer Fired By MpAPP ACTION=" + action + " MpHB=" + Long.toString(mService.mMpHeartbeatDuration));
+                mService.logger.info("Heartbeat Timer Fired By MpAPP ACTION=" + action + " MpHB=" + Long.toString(mService.mMpHeartbeatDuration) + " HBTime =" + mService.mPreviousMpHbTime);
 
                 mService.registerHeartbeatTimer();
 
@@ -806,7 +811,9 @@ public class MpMasterService extends Service {
         if (keepAlive) {
             alarmIntent.putExtra("keepAlive", keepAlive);
         }
-        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, keepAlive ? 0 : 1, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);
+        int uniqueReqCode = reqCode.getAndIncrement();
+        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, uniqueReqCode, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);
+//        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, keepAlive ? 0 : 1, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);
 
         Date dt = new Date(triggerTime);
 
@@ -913,12 +920,14 @@ public class MpMasterService extends Service {
             notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
         }*/
 
-        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
+        int uniqueReqCode = reqCode.getAndIncrement();
+        PendingIntent pendingIntent = PendingIntent.getActivity(this, uniqueReqCode, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
 
         // make a stop intent
         Intent stopIntent = new Intent(this, MpMasterService.class);
         stopIntent.setAction(ACTION_STOP);
-        PendingIntent pendingStopIntent = PendingIntent.getService(this, 0, stopIntent, PendingIntent.FLAG_UPDATE_CURRENT);
+        uniqueReqCode = reqCode.getAndIncrement();
+        PendingIntent pendingStopIntent = PendingIntent.getService(this, uniqueReqCode, stopIntent, PendingIntent.FLAG_UPDATE_CURRENT);
         RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.notification);
         remoteViews.setOnClickPendingIntent(R.id.btn_stop, pendingStopIntent);