diff --git a/sec-api/src/main/java/com/imdroid/secapi/dto/GnssDevice.java b/sec-api/src/main/java/com/imdroid/secapi/dto/GnssDevice.java
index 0e6f5463..5527675b 100644
--- a/sec-api/src/main/java/com/imdroid/secapi/dto/GnssDevice.java
+++ b/sec-api/src/main/java/com/imdroid/secapi/dto/GnssDevice.java
@@ -3,7 +3,6 @@ package com.imdroid.secapi.dto;
 import com.baomidou.mybatisplus.annotation.IdType;
 import com.baomidou.mybatisplus.annotation.TableId;
 import com.baomidou.mybatisplus.annotation.TableName;
-import com.imdroid.common.util.ByteUtil;
 import com.imdroid.common.util.HexUtil;
 import lombok.Data;
 
@@ -103,10 +102,9 @@ public class GnssDevice {
         return cmdList;
     }
 
-    public boolean clearChangeFlag(String ack){
+    public boolean clearChangeFlag(byte[] ackBytes){
         boolean result = false;
         if(change_flag!=0) {
-            byte[] ackBytes = ByteUtil.hexStringTobyte(ack);
             if(ackBytes[ackBytes.length-1] == 1) {
                 if (ackBytes[8] == 0x55) {
                     change_flag &= ~PARA_MASK_HAS_BATTERY;
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 dce8061c..dd2f709f 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
@@ -44,20 +44,24 @@ public class APIController extends BasicController {
         GnssDevice device = deviceMapper.queryByDeviceId(deviceId);
         if (device == null) return null;
 
-        int msgType = Integer.parseInt(configAck.substring(0, 4), 16);
+        byte[] hexValues = ByteUtil.hexStringTobyte(configAck);
+        // d3 12 00 12 00 81 e7 6f
+        if(hexValues.length < 9) return null;
+
+        int msgType = ByteUtil.getUnsignedShort(hexValues[0],hexValues[1]);
+        byte code = hexValues[8];
         // 配置是否成功
         if (msgType == 0xd311) {
             //最后一个字节为1表示配置成功，0表示配置失败
-            if (configAck.endsWith("01")) {
+            if (hexValues[hexValues.length-1] == 1) {
                 device.setSyn(true);
                 deviceMapper.updateById(device);
             }
-        } else if (msgType == 0xd312) {
+        } else if (msgType == 0xd312 || msgType == 0xd313) {
             // 工作周期一致性检查
-            checkWorkCycle(device, configAck);
-        } else if (msgType == 0xd313) {
-            if(device.getChange_flag()!=0) {
-                if(device.clearChangeFlag(configAck)){
+            if(msgType == 0xd312 && code == 1) checkWorkCycle(device, hexValues);
+            else if((code&0xF0) == 0x50 && device.getChange_flag()!=0){
+                if(device.clearChangeFlag(hexValues)){
                     deviceMapper.updateById(device);
                 }
             }
@@ -90,10 +94,9 @@ public class APIController extends BasicController {
         return null;
     }
 
-    void checkWorkCycle(GnssDevice device, String cfgData) {
+    void checkWorkCycle(GnssDevice device, byte[] hexValues) {
         // d3 12 00 12 00 81 e7 6f 01 0a09000001c2dd7ae1419ee148
         int pos = 9;
-        byte[] hexValues = ByteUtil.hexStringTobyte(cfgData);
         byte workCycle = hexValues[pos++];
         byte workDur = hexValues[pos++];
         byte workOffset = hexValues[pos++];