diff --git a/src/serial_AT.cpp b/src/serial_AT.cpp
index b6e2c17..5eb8f12 100644
--- a/src/serial_AT.cpp
+++ b/src/serial_AT.cpp
@@ -34,6 +34,18 @@ static std::mutex at_tasks_mutex;
 static std::unique_ptr<httplib::Server> http_server;
 static std::thread http_thread;
 
+static bool is_imei_ready()
+{
+    std::lock_guard<std::mutex> lock(imei_mutex);
+    return !IMEI.empty();
+}
+
+static std::string get_imei()
+{
+    std::lock_guard<std::mutex> lock(imei_mutex);
+    return IMEI;
+}
+
 void start_http_server(int port)
 {
     http_server = std::make_unique<httplib::Server>();
@@ -95,18 +107,6 @@ void stop_http_server()
 // 只保留一个任务：AT+GSN
 static std::vector<AtTask> at_tasks = {{"AT+GSN", 3, 0, {}}};
 
-static bool is_imei_ready()
-{
-    std::lock_guard<std::mutex> lock(imei_mutex);
-    return !IMEI.empty();
-}
-
-static std::string get_imei()
-{
-    std::lock_guard<std::mutex> lock(imei_mutex);
-    return IMEI;
-}
-
 // ================== 发送线程 ==================
 static void serial_at_send_loop()
 {