diff --git a/lib/modules/home/controllers/home_controller.dart b/lib/modules/home/controllers/home_controller.dart
index d47400f2d..aa4f7f57c 100644
--- a/lib/modules/home/controllers/home_controller.dart
+++ b/lib/modules/home/controllers/home_controller.dart
@@ -1,7 +1,9 @@
+import 'dart:async';
+
+import 'package:device_jieli/device_jieli.dart';
 import 'package:get/get.dart';
 import 'package:get_storage/get_storage.dart';
 import 'package:agent_service/agent_service.dart';
-// 移除了dart:async导入，因为不再使用Timer
 import '../../../data/services/novice_guide_service.dart';
 import '../../../routes/app_routes.dart';
 import '../../../core/utils/logger.dart';
@@ -68,6 +70,13 @@ class HomeController extends GetxController {
   Worker? _classicBluetoothWorker;
   Worker? _bleConnectionWorker;
 
+  /// 全局 5s 刷新定时器。声明为 static 是为了让它跨 HomeController 实例存活：
+  /// `Get.offAllNamed(Routes.home)` 把旧 controller 干掉、新 controller 起来时，
+  /// 这个定时器始终是同一个，永远在跑，直接调当前注册的 HomeController 的
+  /// `refreshDeviceConnection`（=点刷新按钮的逻辑）。
+  static Timer? _staticPollTimer;
+  static const Duration _pollInterval = Duration(seconds: 5);
+
   final _bluetoothManager = Get.find<BluetoothManager>();
   final _bleManager = Get.find<BleManager>();
 
@@ -101,13 +110,30 @@ class HomeController extends GetxController {
     _deviceInfoWorker?.dispose();
     _classicBluetoothWorker?.dispose();
     _bleConnectionWorker?.dispose();
-    // 移除了定时器停止逻辑
     super.onClose();
   }
 
   void _initWithCachedInfo() {
     _setupStateListeners();
     _checkConnectionStatus();
+    _ensureStaticPollTimer();
+  }
+
+  /// 启动静态 5s 刷新定时器。已经在跑就什么都不做。
+  /// 定时器一旦起来就永远不取消（HomeController 只是 lazyPut，控制器实例可能反复
+  /// 销毁/重建，但定时器跨实例存活），每次 fire 都去当前注册的 HomeController
+  /// 调 refreshDeviceConnection——和用户点刷新按钮完全等价。
+  static void _ensureStaticPollTimer() {
+    if (_staticPollTimer != null && _staticPollTimer!.isActive) return;
+    _staticPollTimer = Timer.periodic(_pollInterval, (_) {
+      try {
+        if (Get.isRegistered<HomeController>()) {
+          Get.find<HomeController>().refreshDeviceConnection();
+        }
+      } catch (_) {
+        // 忽略：home 还没注册或者刚销毁中间窗口期
+      }
+    });
   }
 
   void _setupStateListeners() {
@@ -236,18 +262,18 @@ class HomeController extends GetxController {
 
   Future<void> _checkConnectionStatus() async {
     try {
-      final currentBleState = await _bleManager.getConnectionState();
-      print('fdp--_checkConnectionStatus--currentBleState: $currentBleState');
-      bool hasClassicBluetooth = currentDevice != null;
-      bool hasBleConnection = currentBleState == 2;
-      bool wasConnected = _isFullyConnected.value;
-      bool isNowConnected = hasClassicBluetooth && hasBleConnection;
-
-      //bool isGuideCompleted = _storage.read('home_guide') ?? false;
-
-      if (isNowConnected && currentDevice == null) {
-        isNowConnected = false;
+      // 直接问杰理 SDK 当前已连接设备
+      JieliDevice? sdkDevice;
+      try {
+        sdkDevice = await Jielihome.instance.connectedDevice();
+      } catch (e) {
+        Logger.w(_tag, '查询杰理已连接设备失败: $e');
+        sdkDevice = null;
       }
+      final hasBleConnection =
+          sdkDevice != null && sdkDevice.address.isNotEmpty;
+      bool wasConnected = _isFullyConnected.value;
+      bool isNowConnected = hasBleConnection;
 
       if (_isFullyConnected.value != isNowConnected) {
         _isFullyConnected.value = isNowConnected;