diff --git a/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java b/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java
index ee53ece6..6ee9578a 100644
--- a/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java
+++ b/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java
@@ -83,7 +83,7 @@ public class APIController extends BasicController{
         Short len = 15;
         String uploadCmd = "D312" + HexUtil.Short2HexString(len) +
                 HexUtil.Int2HexString(Integer.parseInt(deviceId)) +
-                "0F"
+                "1B"
                 + HexUtil.Byte2HexString((byte) (lastOnlineTime.getYear() - 2000))
                 + HexUtil.Byte2HexString((byte) (lastOnlineTime.getMonthValue()))
                 + HexUtil.Byte2HexString((byte) (lastOnlineTime.getDayOfMonth()))