diff --git a/YD_AllHeartRates.Api/Mqtt/MqttBackgroundService.cs b/YD_AllHeartRates.Api/Mqtt/MqttBackgroundService.cs
index cef03df..6ccbcc8 100644
--- a/YD_AllHeartRates.Api/Mqtt/MqttBackgroundService.cs
+++ b/YD_AllHeartRates.Api/Mqtt/MqttBackgroundService.cs
@@ -97,7 +97,7 @@ namespace YD_AllHeartRates.Api.Mqtt
                     studentList = (from d in _smartSportsContext.Device
                                    join s in _smartSportsContext.Student on d.StudentNo equals s.StudentNo
                                    join c in _smartSportsContext.Class on s.ClassId equals c.Id
-                                   where s.StudentStatus == 1
+                                   where s.SchoolCode == AppSettings.SchoolCode && s.StudentStatus == 1
                                    select new StudentDto
                                    {
                                        SchoolCode = s.SchoolCode,
@@ -114,7 +114,7 @@ namespace YD_AllHeartRates.Api.Mqtt
                                        DeviceType = d.DeviceType,
                                    }).ToList();
 
-                    devices = _smartSportsContext.Device.ToList();
+                    devices = _smartSportsContext.Device.Where(x => x.SchoolCode == AppSettings.SchoolCode).ToList();
 
                     _caching.AddObject(AppSettings.StudentListCacheKey, studentList, 28800);
                     _caching.AddObject(AppSettings.DeviceListCacheKey, devices, 28800);
diff --git a/YD_AllHeartRates.Api/Utilities/AppSettings.cs b/YD_AllHeartRates.Api/Utilities/AppSettings.cs
index b4f1cdb..464b422 100644
--- a/YD_AllHeartRates.Api/Utilities/AppSettings.cs
+++ b/YD_AllHeartRates.Api/Utilities/AppSettings.cs
@@ -16,6 +16,8 @@
 
         public static string StudentListCacheKey = "student_list";
         public static string DeviceListCacheKey = "device_list";
+        public static string SchoolCode { get; set; }
+
         public static void Init(IConfiguration configuration)
         {
             Logging = configuration.GetSection("Logging").Get<LoggingConfig>();
@@ -25,6 +27,7 @@
             FlushTime = configuration["FlushTime"];
             DbConnectionString = configuration["DbConnectionString"];
             SmartSportsString = configuration["SmartSportsString"];
+            SchoolCode = configuration["SchoolCode"];
             RedisConnectionString = configuration["RedisConnectionString"];
             CorsUrls = configuration["CorsUrls"].Split(',');
             Mqtt = configuration.GetSection("Mqtt").Get<MqttConfig>();
diff --git a/YD_AllHeartRates.Api/appsettings.json b/YD_AllHeartRates.Api/appsettings.json
index 5948be5..cbe105f 100644
--- a/YD_AllHeartRates.Api/appsettings.json
+++ b/YD_AllHeartRates.Api/appsettings.json
@@ -25,6 +25,8 @@
 
   "FlushTime": "2000", //大屏刷新周期
 
+  "SchoolCode": "202507280052",
+
   "AppUrls": {
   },