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 f97f3d4d..a9b85e9b 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
@@ -164,18 +164,6 @@ public class APIController extends BasicController{
         return null;
     }
 
-    void checkAndAskICCID(GnssDevice device){
-        if(device.getIccid() == null) {
-            String sendCmd = "AT+ICCID";
-            int msgType = 0xD310 + 10; // DTU
-            short len = (short) (sendCmd.length() + 5);
-            sendCmd = Integer.toHexString(msgType) + HexUtil.Short2HexString(len) +
-                    HexUtil.Int2HexString(Integer.parseInt(device.getDeviceid())) +
-                    "01" + HexUtil.String2HexString(sendCmd);
-            rtcmClient.config(device.getDeviceid(), sendCmd);
-        }
-    }
-
     /****** device stop *******/
     @PostMapping(value = "/api/device_stop")
     @ResponseBody
@@ -224,6 +212,17 @@ public class APIController extends BasicController{
         msgMapper.insert(gnssMsg);
     }
 
+    void checkAndAskICCID(GnssDevice device){
+        if(device.getIccid() == null || device.getIccid().trim().isEmpty()) {
+            String sendCmd = "AT+ICCID";
+            int msgType = 0xD310 + 10; // DTU
+            short len = (short) (sendCmd.length() + 5);
+            sendCmd = Integer.toHexString(msgType) + HexUtil.Short2HexString(len) +
+                    HexUtil.Int2HexString(Integer.parseInt(device.getDeviceid())) +
+                    "01" + HexUtil.String2HexString(sendCmd);
+            rtcmClient.config(device.getDeviceid(), sendCmd);
+        }
+    }
     void updateICCID(GnssDevice device, String dtuAck) {
         // 只检查 "ICCID:" 的十六进制部分
         if(!dtuAck.contains("49434349443a")){