diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
index a32b8938..e2f30b4a 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
@@ -507,7 +507,9 @@ public class AppMaster {
             String url = jsonObject.optString("url", null);
             mService.logger.warning("Recv Upload Log " + url);
             int noSpecData = jsonObject.optInt("noSpecData", 0);
-            uploadLogs(url, noSpecData == 0);
+            long modificationTime = jsonObject.optLong("mTime", 0);
+            modificationTime *= 1000; // to ms
+            uploadLogs(url, noSpecData == 0, modificationTime);
             // uploadMasterLogs(url);
         } else if (TextUtils.equals(cmd, CMD_SET_CMA)) {
             String ip = jsonObject.optString("value_str", null);
@@ -933,12 +935,12 @@ public class AppMaster {
         }
     }
 
-    private void uploadLogs(String url, final boolean includingSpecData) {
+    private void uploadLogs(String url, final boolean includingSpecData, final long modificationTime) {
         String appDir = mService.buildAppDir();
 
         try {
 
-            long ts = System.currentTimeMillis();//long now = android.os.SystemClock.uptimeMillis();
+            final long ts = System.currentTimeMillis();//long now = android.os.SystemClock.uptimeMillis();
             SimpleDateFormat format = new SimpleDateFormat("yyyyMMddHHmmss");
             Date dt = new Date(ts);
 
@@ -978,6 +980,13 @@ public class AppMaster {
                         return false;
                     }
 
+                    if (modificationTime > 0) {
+                        File f = new File(dir, name);
+                        if (ts - f.lastModified() > modificationTime) {
+                            return false;
+                        }
+                    }
+
                     return true;
                 }
             };