diff --git a/src/main/java/com/shzg/project/worn/controller/SocketController.java b/src/main/java/com/shzg/project/worn/controller/SocketController.java
index 71be864..9cadfc8 100644
--- a/src/main/java/com/shzg/project/worn/controller/SocketController.java
+++ b/src/main/java/com/shzg/project/worn/controller/SocketController.java
@@ -13,7 +13,7 @@ public class SocketController {
     private IMqttSocketService mqttSocketService;
 
     /**
-     * 控制插座开关
+     * 控制智能排风插座开关
      */
     @PostMapping("/control")
     public AjaxResult control(@RequestParam String devEui,
diff --git a/src/main/java/com/shzg/project/worn/domain/MqttSensorDevice.java b/src/main/java/com/shzg/project/worn/domain/MqttSensorDevice.java
index 8f1926d..7f3a072 100644
--- a/src/main/java/com/shzg/project/worn/domain/MqttSensorDevice.java
+++ b/src/main/java/com/shzg/project/worn/domain/MqttSensorDevice.java
@@ -19,15 +19,15 @@ public class MqttSensorDevice extends BaseEntity
     private Long id;
 
     /** 设备唯一标识（DevEUI） */
-    @Excel(name = "设备唯一标识", readConverterExp = "D=evEUI")
+    @Excel(name = "设备唯一标识")
     private String devEui;
 
     /** 设备名称 */
     @Excel(name = "设备名称")
     private String deviceName;
 
-    /** 设备类型（smoke / env） */
-    @Excel(name = "设备类型", readConverterExp = "s=moke,/=,e=nv")
+    /** 设备类型（smoke / env / socket / door 等） */
+    @Excel(name = "设备类型")
     private String deviceType;
 
     /** 所属部门ID */
@@ -38,6 +38,10 @@ public class MqttSensorDevice extends BaseEntity
     @Excel(name = "所属部门名称")
     private String deptName;
 
+    /** 🔥 上报周期（分钟） */
+    @Excel(name = "上报周期(分钟)")
+    private Integer reportIntervalMinute;
+
     /** 状态（0正常 1停用） */
     @Excel(name = "状态", readConverterExp = "0=正常,1=停用")
     private String status;
@@ -106,6 +110,16 @@ public class MqttSensorDevice extends BaseEntity
         return deptName;
     }
 
+    public void setReportIntervalMinute(Integer reportIntervalMinute)
+    {
+        this.reportIntervalMinute = reportIntervalMinute;
+    }
+
+    public Integer getReportIntervalMinute()
+    {
+        return reportIntervalMinute;
+    }
+
     public void setStatus(String status)
     {
         this.status = status;
@@ -135,6 +149,7 @@ public class MqttSensorDevice extends BaseEntity
                 .append("deviceType", getDeviceType())
                 .append("deptId", getDeptId())
                 .append("deptName", getDeptName())
+                .append("reportIntervalMinute", getReportIntervalMinute())
                 .append("status", getStatus())
                 .append("remark", getRemark())
                 .append("createBy", getCreateBy())
diff --git a/src/main/java/com/shzg/project/worn/mapper/MqttSensorDeviceMapper.java b/src/main/java/com/shzg/project/worn/mapper/MqttSensorDeviceMapper.java
index 2e4761d..9c9d17e 100644
--- a/src/main/java/com/shzg/project/worn/mapper/MqttSensorDeviceMapper.java
+++ b/src/main/java/com/shzg/project/worn/mapper/MqttSensorDeviceMapper.java
@@ -73,4 +73,19 @@ public interface MqttSensorDeviceMapper
      * 设备统计（按权限）
      */
     Map<String, Object> countDeviceStat(@Param("deptIds") List<Long> deptIds);
+
+    /**
+     * 更新设备运行状态（0在线 1离线）
+     *
+     * @param device 设备
+     * @return 结果
+     */
+    int updateRuntimeStatus(MqttSensorDevice device);
+
+    /**
+     * 查询超时离线设备
+     *
+     * @return 设备列表
+     */
+    List<MqttSensorDevice> selectOfflineDeviceList();
 }
diff --git a/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/DoorSensorHandler.java b/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/DoorSensorHandler.java
index ad6bc24..c3b9023 100644
--- a/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/DoorSensorHandler.java
+++ b/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/DoorSensorHandler.java
@@ -9,6 +9,7 @@ import com.shzg.project.worn.domain.MqttSensorEvent;
 import com.shzg.project.worn.service.IDeviceStatusService;
 import com.shzg.project.worn.service.IMqttSensorDataService;
 import com.shzg.project.worn.service.IMqttSensorEventService;
+import com.shzg.project.worn.unit.DeviceStatusUtil;
 import com.shzg.project.worn.websocket.manager.WebSocketSessionManager;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -35,10 +36,12 @@ public class DoorSensorHandler {
     @Autowired
     private ISysDeptService deptService;
 
-    // 状态服务（Redis去重）
     @Autowired
     private IDeviceStatusService deviceStatusService;
 
+    @Autowired
+    private DeviceStatusUtil deviceStatusUtil;
+
     public void handle(MqttSensorDevice device, String topic, String payload) {
 
         // =========================
@@ -67,7 +70,7 @@ public class DoorSensorHandler {
                     devEui, device.getDeptId(), doorStatus, tamperStatus, battery);
 
             // =========================
-            // 2️⃣ 数据入库（始终入库）
+            // 2️⃣ 数据入库
             // =========================
             MqttSensorData data = new MqttSensorData();
             data.setDeviceId(device.getId());
@@ -100,32 +103,12 @@ public class DoorSensorHandler {
             }
 
             // =========================
-            // 4️⃣ Redis去重（核心）
+            // 4️⃣ 恢复在线
             // =========================
-            boolean changed = deviceStatusService.isStatusChanged(
-                    device.getId(),
-                    "door",
-                    status
-            );
-
-            // 状态没变化，直接返回（不产生事件、不推送）
-            if (!changed) {
-                return;
-            }
+            deviceStatusUtil.handleOnline(device);
 
             // =========================
-            // 5️⃣ 事件处理（只在变化时）
-            // =========================
-            if ("open".equals(status)) {
-                saveEvent(device, "door_open", "门已打开");
-            } else if ("close".equals(status)) {
-                saveEvent(device, "door_close", "门已关闭");
-            } else if ("tamper".equals(status)) {
-                saveEvent(device, "tamper", "设备被拆除");
-            }
-
-            // =========================
-            // 6️⃣ 查询部门名称
+            // 5️⃣ 查询部门名称
             // =========================
             String deptName = null;
             SysDept dept = deptService.selectDeptById(device.getDeptId());
@@ -134,7 +117,7 @@ public class DoorSensorHandler {
             }
 
             // =========================
-            // 7️⃣ WebSocket推送（只推变化）
+            // 6️⃣ WebSocket推送（周期上报也要推）
             // =========================
             JSONObject ws = new JSONObject();
             ws.put("type", "door");
@@ -150,6 +133,30 @@ public class DoorSensorHandler {
 
             sessionManager.sendToDept(device.getDeptId(), ws.toJSONString());
 
+            // =========================
+            // 7️⃣ Redis去重
+            // =========================
+            boolean changed = deviceStatusService.isStatusChanged(
+                    device.getId(),
+                    "door",
+                    status
+            );
+
+            if (!changed) {
+                return;
+            }
+
+            // =========================
+            // 8️⃣ 事件处理
+            // =========================
+            if ("open".equals(status)) {
+                saveEvent(device, "door_open", "门已打开");
+            } else if ("close".equals(status)) {
+                saveEvent(device, "door_close", "门已关闭");
+            } else if ("tamper".equals(status)) {
+                saveEvent(device, "tamper", "设备被拆除");
+            }
+
         } catch (Exception e) {
             log.error("[DOOR] 处理异常 payload={}", payload, e);
         }
@@ -179,4 +186,4 @@ public class DoorSensorHandler {
 
         eventService.insertMqttSensorEvent(event);
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/EnvSensorHandler.java b/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/EnvSensorHandler.java
index 0cf2b42..b2728fe 100644
--- a/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/EnvSensorHandler.java
+++ b/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/EnvSensorHandler.java
@@ -5,6 +5,7 @@ import com.shzg.project.system.domain.SysDept;
 import com.shzg.project.system.service.ISysDeptService;
 import com.shzg.project.worn.domain.*;
 import com.shzg.project.worn.service.*;
+import com.shzg.project.worn.unit.DeviceStatusUtil;
 import com.shzg.project.worn.websocket.manager.WebSocketSessionManager;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -35,10 +36,13 @@ public class EnvSensorHandler {
     @Autowired
     private ISysDeptService deptService;
 
-    // 状态服务（Redis）
     @Autowired
     private IDeviceStatusService deviceStatusService;
 
+    // ✅ 新增
+    @Autowired
+    private DeviceStatusUtil deviceStatusUtil;
+
     public void handle(MqttSensorDevice device, String topic, String payload) {
 
         if (device == null) {
@@ -59,13 +63,24 @@ public class EnvSensorHandler {
 
         TopicInfo topicInfo = parseTopic(topic);
 
+        // =========================
         // 1️⃣ 入库
+        // =========================
         saveData(device, topic, payload, topicInfo, v);
 
-        // 2️⃣ 推送（周期数据必须推）
+        // =========================
+        // 2️⃣ 恢复在线
+        // =========================
+        deviceStatusUtil.handleOnline(device);
+
+        // =========================
+        // 3️⃣ 推送（周期数据必须推）
+        // =========================
         pushWebSocket(device, v);
 
-        // 3️⃣ 事件检测（带去重）
+        // =========================
+        // 4️⃣ 事件检测（带去重）
+        // =========================
         handleEvent(device, v);
     }
 
@@ -143,9 +158,6 @@ public class EnvSensorHandler {
         return "normal";
     }
 
-    /**
-     * 使用Redis去重
-     */
     private void changeStatus(MqttSensorDevice device,
                               String metric,
                               String newStatus,
diff --git a/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/SmartSocketHandler.java b/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/SmartSocketHandler.java
index 461bf1c..ccbccab 100644
--- a/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/SmartSocketHandler.java
+++ b/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/SmartSocketHandler.java
@@ -9,6 +9,7 @@ import com.shzg.project.worn.domain.MqttSensorEvent;
 import com.shzg.project.worn.service.IDeviceStatusService;
 import com.shzg.project.worn.service.IMqttSensorDataService;
 import com.shzg.project.worn.service.IMqttSensorEventService;
+import com.shzg.project.worn.unit.DeviceStatusUtil;
 import com.shzg.project.worn.websocket.manager.WebSocketSessionManager;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -35,10 +36,12 @@ public class SmartSocketHandler {
     @Autowired
     private ISysDeptService deptService;
 
-    // 状态去重服务
     @Autowired
     private IDeviceStatusService deviceStatusService;
 
+    @Autowired
+    private DeviceStatusUtil deviceStatusUtil;
+
     public void handle(MqttSensorDevice device, String topic, String payload) {
 
         // ================== 基础校验 ==================
@@ -82,7 +85,7 @@ public class SmartSocketHandler {
             return;
         }
 
-        // ================== 入库（始终入库） ==================
+        // ================== 入库（有效数据） ==================
         MqttSensorData data = new MqttSensorData();
         data.setDeviceId(device.getId());
         data.setDeptId(device.getDeptId());
@@ -95,6 +98,9 @@ public class SmartSocketHandler {
 
         dataService.insertMqttSensorData(data);
 
+        // ================== 恢复在线 ==================
+        deviceStatusUtil.handleOnline(device);
+
         // ================== 状态字符串 ==================
         String statusStr = (switchStatus == 1 ? "on" : "off");
 
@@ -105,9 +111,6 @@ public class SmartSocketHandler {
                 statusStr
         );
 
-        // 没变化直接返回（不写事件、不推送）
-        // 状态没变化也继续向前端推送周期数据，事件入库仍在推送后去重。
-
         // ================== 查询部门 ==================
         String deptName = null;
         SysDept dept = deptService.selectDeptById(device.getDeptId());
@@ -115,7 +118,7 @@ public class SmartSocketHandler {
             deptName = dept.getDeptName();
         }
 
-        // ================== WebSocket推送（只推变化） ==================
+        // ================== WebSocket推送 ==================
         try {
             JSONObject msg = new JSONObject();
             msg.put("type", "socket");
@@ -155,4 +158,4 @@ public class SmartSocketHandler {
                 status,
                 switchStatus);
     }
-}
+}
\ No newline at end of file
diff --git a/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/SmokeSensorHandler.java b/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/SmokeSensorHandler.java
index dc1dfb5..6c129ee 100644
--- a/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/SmokeSensorHandler.java
+++ b/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/SmokeSensorHandler.java
@@ -9,6 +9,7 @@ import com.shzg.project.worn.domain.MqttSensorEvent;
 import com.shzg.project.worn.service.IDeviceStatusService;
 import com.shzg.project.worn.service.IMqttSensorDataService;
 import com.shzg.project.worn.service.IMqttSensorEventService;
+import com.shzg.project.worn.unit.DeviceStatusUtil;
 import com.shzg.project.worn.websocket.manager.WebSocketSessionManager;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -18,7 +19,7 @@ import java.math.BigDecimal;
 import java.util.Date;
 
 /**
- * 烟雾传感器 Handler
+ * 烟雾传感器 Handler（最终生产版）
  */
 @Slf4j
 @Component
@@ -39,6 +40,9 @@ public class SmokeSensorHandler {
     @Autowired
     private IDeviceStatusService deviceStatusService;
 
+    @Autowired
+    private DeviceStatusUtil deviceStatusUtil;
+
     public void handle(MqttSensorDevice device, String topic, String payload) {
 
         if (device == null) {
@@ -85,7 +89,7 @@ public class SmokeSensorHandler {
             deptName = dept.getDeptName();
         }
 
-        // ================== 数据入库（始终入库） ==================
+        // ================== 数据入库 ==================
         MqttSensorData data = new MqttSensorData();
         data.setDeviceId(device.getId());
         data.setDeptId(device.getDeptId());
@@ -106,7 +110,10 @@ public class SmokeSensorHandler {
 
         dataService.insertMqttSensorData(data);
 
-        // ================== 先判断状态 ==================
+        // ================== 🔥 恢复在线 ==================
+        deviceStatusUtil.handleOnline(device);
+
+        // ================== 状态判断 ==================
         String newStatus;
         String eventType;
         String desc;
@@ -147,10 +154,8 @@ public class SmokeSensorHandler {
         );
 
         // ================== WebSocket推送 ==================
-        // 烟感这里建议周期数据继续推，事件去重即可
         pushWebSocket(device, deptName, event, battery, concentration, temperature, newStatus);
 
-        // 状态没变化，不重复写事件
         if (!changed) {
             return;
         }
@@ -158,13 +163,18 @@ public class SmokeSensorHandler {
         // ================== 事件入库 ==================
         insertEvent(device, eventType, desc, level);
 
+        // ================== 🔥 联动控制（核心扩展点） ==================
+        if ("alarm".equals(newStatus)) {
+            log.warn("[SMOKE] 触发联动（烟雾报警）deviceId={}", device.getId());
+
+            // 👉 这里后面接：
+            // socketService.openFan(device.getDeptId());
+        }
+
         log.info("[SMOKE] 状态变化 deviceId={}, status={}, eventType={}",
                 device.getId(), newStatus, eventType);
     }
 
-    /**
-     * WebSocket推送
-     */
     private void pushWebSocket(MqttSensorDevice device,
                                String deptName,
                                String event,
@@ -197,9 +207,6 @@ public class SmokeSensorHandler {
         }
     }
 
-    /**
-     * 事件入库
-     */
     private void insertEvent(MqttSensorDevice device,
                              String type,
                              String desc,
diff --git a/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/WaterSensorHandler.java b/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/WaterSensorHandler.java
index df19d05..a1cfc94 100644
--- a/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/WaterSensorHandler.java
+++ b/src/main/java/com/shzg/project/worn/sensor/mqtt/handler/WaterSensorHandler.java
@@ -9,6 +9,7 @@ import com.shzg.project.worn.domain.MqttSensorEvent;
 import com.shzg.project.worn.service.IDeviceStatusService;
 import com.shzg.project.worn.service.IMqttSensorDataService;
 import com.shzg.project.worn.service.IMqttSensorEventService;
+import com.shzg.project.worn.unit.DeviceStatusUtil;
 import com.shzg.project.worn.websocket.manager.WebSocketSessionManager;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -33,10 +34,12 @@ public class WaterSensorHandler {
     @Autowired
     private ISysDeptService deptService;
 
-    // Redis状态去重
     @Autowired
     private IDeviceStatusService deviceStatusService;
 
+    @Autowired
+    private DeviceStatusUtil deviceStatusUtil;
+
     public void handle(MqttSensorDevice device, String topic, String payload) {
 
         if (device == null) return;
@@ -57,15 +60,18 @@ public class WaterSensorHandler {
             deptName = dept.getDeptName();
         }
 
-        // ================== 入库（始终入库） ==================
+        // ================== 入库 ==================
         saveData(device, topic, payload, topicInfo, info);
 
+        // ================== 恢复在线 ==================
+        deviceStatusUtil.handleOnline(device);
+
         // ================== 状态计算 ==================
         String status = (info.getWater() != null && info.getWater() == 1)
                 ? "alarm"
                 : "normal";
 
-        // ================== WebSocket（周期数据推送） ==================
+        // ================== WebSocket ==================
         pushWebSocket(device, deptName, info, status);
 
         // ================== Redis去重 ==================
@@ -89,7 +95,6 @@ public class WaterSensorHandler {
         log.info("[WATER] 状态变化 deviceId={}, status={}", device.getId(), status);
     }
 
-
     // ================== WebSocket ==================
     private void pushWebSocket(MqttSensorDevice device,
                                String deptName,
@@ -112,8 +117,7 @@ public class WaterSensorHandler {
         sessionManager.sendToDept(device.getDeptId(), msg.toJSONString());
     }
 
-
-    // ================== 事件写入 ==================
+    // ================== 事件 ==================
     private void triggerEvent(MqttSensorDevice device,
                               String type,
                               String level,
@@ -132,7 +136,6 @@ public class WaterSensorHandler {
 
         eventService.insertMqttSensorEvent(event);
 
-        // 推送告警
         JSONObject msg = new JSONObject();
         msg.put("type", "alarm");
         msg.put("deviceId", device.getId());
@@ -148,7 +151,6 @@ public class WaterSensorHandler {
         sessionManager.sendToDept(device.getDeptId(), msg.toJSONString());
     }
 
-
     // ================== 入库 ==================
     private void saveData(MqttSensorDevice device,
                           String topic,
@@ -174,7 +176,6 @@ public class WaterSensorHandler {
         sensorDataService.insertMqttSensorData(data);
     }
 
-
     // ================== 工具 ==================
     private JSONObject parseJson(String payload) {
         try {
@@ -230,7 +231,6 @@ public class WaterSensorHandler {
         }
     }
 
-
     private static class TopicInfo {
         String project;
         String warehouse;
diff --git a/src/main/java/com/shzg/project/worn/service/IMqttSensorDeviceService.java b/src/main/java/com/shzg/project/worn/service/IMqttSensorDeviceService.java
index c2d849e..093a09f 100644
--- a/src/main/java/com/shzg/project/worn/service/IMqttSensorDeviceService.java
+++ b/src/main/java/com/shzg/project/worn/service/IMqttSensorDeviceService.java
@@ -65,4 +65,13 @@ public interface IMqttSensorDeviceService
      * @return
      */
     MqttSensorDevice selectByDevEui(String devEui);
+
+    /**
+     * 更新设备在线状态（0在线 1离线）
+     *
+     * @param deviceId 设备ID
+     * @param status 状态
+     * @return 结果
+     */
+    int updateRuntimeStatus(Long deviceId, String status);
 }
diff --git a/src/main/java/com/shzg/project/worn/service/impl/MqttSensorDeviceServiceImpl.java b/src/main/java/com/shzg/project/worn/service/impl/MqttSensorDeviceServiceImpl.java
index e57cb61..6caf533 100644
--- a/src/main/java/com/shzg/project/worn/service/impl/MqttSensorDeviceServiceImpl.java
+++ b/src/main/java/com/shzg/project/worn/service/impl/MqttSensorDeviceServiceImpl.java
@@ -127,4 +127,19 @@ public class MqttSensorDeviceServiceImpl implements IMqttSensorDeviceService
 
         return mqttSensorDeviceMapper.selectByDevEui(devEui.toLowerCase());
     }
+
+    @Override
+    public int updateRuntimeStatus(Long deviceId, String status)
+    {
+        if (deviceId == null || status == null || status.isEmpty()) {
+            return 0;
+        }
+
+        MqttSensorDevice update = new MqttSensorDevice();
+        update.setId(deviceId);
+        update.setStatus(status);
+        update.setUpdateTime(DateUtils.getNowDate());
+
+        return mqttSensorDeviceMapper.updateRuntimeStatus(update);
+    }
 }
diff --git a/src/main/java/com/shzg/project/worn/service/impl/MqttSocketServiceImpl.java b/src/main/java/com/shzg/project/worn/service/impl/MqttSocketServiceImpl.java
index 8c7a93e..ba0b0d4 100644
--- a/src/main/java/com/shzg/project/worn/service/impl/MqttSocketServiceImpl.java
+++ b/src/main/java/com/shzg/project/worn/service/impl/MqttSocketServiceImpl.java
@@ -10,6 +10,7 @@ import com.shzg.project.worn.service.*;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+import java.util.Base64;
 import java.util.Date;
 import java.util.UUID;
 
@@ -33,24 +34,42 @@ public class MqttSocketServiceImpl implements IMqttSocketService {
 
         // ================== 1️⃣ 查设备 ==================
         MqttSensorDevice device = deviceService.selectByDevEui(devEui);
+
         if (device == null) {
             throw new RuntimeException("设备不存在: " + devEui);
         }
 
-        // ================== 2️⃣ 查Topic配置 ==================
+        // ================== 2️⃣ 查Topic ==================
         MqttTopicConfig config = topicConfigService.selectByDeptId(device.getDeptId());
+
         if (config == null) {
             throw new RuntimeException("未配置MQTT主题，deptId=" + device.getDeptId());
         }
 
-        // ================== 3️⃣ 拼接topic ==================
         String topic = config.getTopicDownPrefix() + "/" + devEui.toLowerCase();
 
-        // ================== 4️⃣ 构造指令 ==================
-        String base64 = on ? "CAEA/w==" : "CAAA/w==";
-
+        // ================== 3️⃣ 生成requestId ==================
         String requestId = UUID.randomUUID().toString();
 
+        // ================== 4️⃣ 构造指令 ==================
+        String base64;
+
+        String deviceType = device.getDeviceType();
+
+        if ("socket".equalsIgnoreCase(deviceType)) {
+            // 插座（WS513 / WS515）
+            base64 = on ? "CAEA/w==" : "CAAA/w==";
+
+        } else if ("switch".equalsIgnoreCase(deviceType)) {
+            // 开关（WS503）
+            // 控制 L1（第一路）
+            String hex = on ? "0811FF" : "0810FF";
+            base64 = Base64.getEncoder().encodeToString(hexStringToBytes(hex));
+
+        } else {
+            throw new RuntimeException("未知设备类型: " + deviceType);
+        }
+
         JSONObject json = new JSONObject();
         json.put("confirmed", true);
         json.put("fport", 85);
@@ -59,13 +78,13 @@ public class MqttSocketServiceImpl implements IMqttSocketService {
 
         String payload = json.toJSONString();
 
-        // ================== 5️⃣ 写指令记录（发送前） ==================
+        // ================== 5️⃣ 记录指令 ==================
         MqttSensorCommand cmd = new MqttSensorCommand();
         cmd.setDeviceId(device.getId());
         cmd.setTopic(topic);
         cmd.setCommand(on ? "ON" : "OFF");
         cmd.setPayload(payload);
-        cmd.setStatus("0"); // 0=待确认
+        cmd.setStatus("0"); // 待确认
         cmd.setSendTime(new Date());
         cmd.setIsDelete("0");
         cmd.setCreateTime(DateUtils.getNowDate());
@@ -75,9 +94,25 @@ public class MqttSocketServiceImpl implements IMqttSocketService {
         // ================== 6️⃣ 发送MQTT ==================
         mqttPublishClient.publish(topic, payload);
 
-        // ================== 7️⃣ 日志 ==================
+        // ================== 7️⃣ 打印日志 ==================
         System.out.println("[SOCKET] 指令发送 devEui=" + devEui +
+                ", type=" + deviceType +
                 ", status=" + (on ? "ON" : "OFF") +
                 ", requestId=" + requestId);
     }
+
+    /**
+     * hex字符串转byte[]
+     */
+    private byte[] hexStringToBytes(String hex) {
+        int len = hex.length();
+        byte[] data = new byte[len / 2];
+        for (int i = 0; i < len; i += 2) {
+            data[i / 2] = (byte) (
+                    (Character.digit(hex.charAt(i), 16) << 4)
+                            + Character.digit(hex.charAt(i + 1), 16)
+            );
+        }
+        return data;
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/com/shzg/project/worn/unit/DeviceOfflineCheckTask.java b/src/main/java/com/shzg/project/worn/unit/DeviceOfflineCheckTask.java
new file mode 100644
index 0000000..48b14e0
--- /dev/null
+++ b/src/main/java/com/shzg/project/worn/unit/DeviceOfflineCheckTask.java
@@ -0,0 +1,101 @@
+package com.shzg.project.worn.unit;
+
+import com.alibaba.fastjson2.JSONObject;
+import com.shzg.project.worn.domain.MqttSensorDevice;
+import com.shzg.project.worn.mapper.MqttSensorDeviceMapper;
+import com.shzg.project.worn.service.IMqttSensorDeviceService;
+import com.shzg.project.worn.websocket.manager.WebSocketSessionManager;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Component;
+
+import java.util.List;
+
+/**
+ * 设备离线巡检任务
+ * 规则：按设备 report_interval_minute * 3 动态判定离线
+ */
+@Slf4j
+@Component
+public class DeviceOfflineCheckTask {
+
+    @Autowired
+    private MqttSensorDeviceMapper deviceMapper;
+
+    @Autowired
+    private IMqttSensorDeviceService deviceService;
+
+    @Autowired
+    private MqttDeviceCache deviceCache;
+
+    @Autowired
+    private WebSocketSessionManager sessionManager;
+
+    /**
+     * 每5分钟巡检一次
+     */
+    @Scheduled(initialDelay = 60 * 1000L, fixedDelay = 5 * 60 * 1000L)
+    public void checkOfflineDevices() {
+
+        List<MqttSensorDevice> offlineDevices = deviceMapper.selectOfflineDeviceList();
+
+        if (offlineDevices == null || offlineDevices.isEmpty()) {
+            return;
+        }
+
+        boolean cacheChanged = false;
+
+        for (MqttSensorDevice device : offlineDevices) {
+
+            // ✅ 已经是离线状态，跳过（防止重复更新）
+            if ("1".equals(device.getStatus())) {
+                continue;
+            }
+
+            int rows = deviceService.updateRuntimeStatus(device.getId(), "1");
+            if (rows <= 0) {
+                continue;
+            }
+
+            cacheChanged = true;
+
+            // 推送离线消息
+            pushOfflineMessage(device);
+
+            log.info("[DEVICE] 判定离线 deviceId={}, devEui={}, interval={}分钟",
+                    device.getId(),
+                    device.getDevEui(),
+                    device.getReportIntervalMinute());
+        }
+
+        // ✅ 只有发生变化才刷新缓存
+        if (cacheChanged) {
+            deviceCache.refresh();
+        }
+    }
+
+    /**
+     * 推送设备离线消息
+     */
+    private void pushOfflineMessage(MqttSensorDevice device) {
+
+        if (device == null || device.getDeptId() == null) {
+            return;
+        }
+
+        JSONObject msg = new JSONObject();
+        msg.put("type", "device_offline");
+        msg.put("deviceId", device.getId());
+        msg.put("devEui", device.getDevEui());
+        msg.put("deviceName", device.getDeviceName());
+        msg.put("deviceType", device.getDeviceType());
+        msg.put("deptId", device.getDeptId());
+        msg.put("deptName", device.getDeptName());
+        msg.put("deviceStatus", 1);
+        msg.put("statusDesc", "离线");
+        msg.put("time", System.currentTimeMillis());
+
+        sessionManager.sendToDept(device.getDeptId(), msg.toJSONString());
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/shzg/project/worn/unit/DeviceStatusUtil.java b/src/main/java/com/shzg/project/worn/unit/DeviceStatusUtil.java
new file mode 100644
index 0000000..6b03362
--- /dev/null
+++ b/src/main/java/com/shzg/project/worn/unit/DeviceStatusUtil.java
@@ -0,0 +1,81 @@
+package com.shzg.project.worn.unit;
+
+import com.alibaba.fastjson2.JSONObject;
+import com.shzg.common.utils.DateUtils;
+import com.shzg.project.worn.domain.MqttSensorDevice;
+import com.shzg.project.worn.service.IMqttSensorDeviceService;
+import com.shzg.project.worn.unit.MqttDeviceCache;
+import com.shzg.project.worn.websocket.manager.WebSocketSessionManager;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+/**
+ * 设备状态工具类（在线 / 离线统一处理）
+ */
+@Slf4j
+@Component
+public class DeviceStatusUtil {
+
+    @Autowired
+    private IMqttSensorDeviceService deviceService;
+
+    @Autowired
+    private WebSocketSessionManager sessionManager;
+
+    @Autowired
+    private MqttDeviceCache deviceCache;
+
+    /**
+     * 🔥 设备恢复在线（只在“有效消息”后调用）
+     */
+    public void handleOnline(MqttSensorDevice device) {
+
+        if (device == null || device.getId() == null) {
+            return;
+        }
+
+        // ✅ 已经在线，直接返回
+        if ("0".equals(device.getStatus())) {
+            return;
+        }
+
+        int rows = deviceService.updateRuntimeStatus(device.getId(), "0");
+        if (rows <= 0) {
+            return;
+        }
+
+        log.info("[DEVICE] 恢复在线 deviceId={}, devEui={}",
+                device.getId(), device.getDevEui());
+
+        // 推送WebSocket
+        pushOnlineMessage(device);
+
+        // 刷新缓存
+        deviceCache.refresh();
+    }
+
+    /**
+     * 推送在线消息
+     */
+    private void pushOnlineMessage(MqttSensorDevice device) {
+
+        if (device.getDeptId() == null) {
+            return;
+        }
+
+        JSONObject msg = new JSONObject();
+        msg.put("type", "device_online");
+        msg.put("deviceId", device.getId());
+        msg.put("devEui", device.getDevEui());
+        msg.put("deviceName", device.getDeviceName());
+        msg.put("deviceType", device.getDeviceType());
+        msg.put("deptId", device.getDeptId());
+        msg.put("deptName", device.getDeptName());
+        msg.put("deviceStatus", 0);
+        msg.put("statusDesc", "在线");
+        msg.put("time", System.currentTimeMillis());
+
+        sessionManager.sendToDept(device.getDeptId(), msg.toJSONString());
+    }
+}
\ No newline at end of file
diff --git a/src/main/resources/mybatis/worn/MqttSensorDeviceMapper.xml b/src/main/resources/mybatis/worn/MqttSensorDeviceMapper.xml
index 7cef66a..47b3431 100644
--- a/src/main/resources/mybatis/worn/MqttSensorDeviceMapper.xml
+++ b/src/main/resources/mybatis/worn/MqttSensorDeviceMapper.xml
@@ -13,6 +13,7 @@
         <result property="deviceType" column="device_type"/>
         <result property="deptId" column="dept_id"/>
         <result property="deptName" column="dept_name"/>
+        <result property="reportIntervalMinute" column="report_interval_minute"/>
         <result property="status" column="status"/>
         <result property="remark" column="remark"/>
         <result property="createBy" column="create_by"/>
@@ -31,6 +32,7 @@
             d.device_type,
             d.dept_id,
             dept.dept_name,
+            d.report_interval_minute,
             d.status,
             d.remark,
             d.create_by,
@@ -58,6 +60,9 @@
             <if test="deptId != null">
                 and d.dept_id = #{deptId}
             </if>
+            <if test="reportIntervalMinute != null">
+                and d.report_interval_minute = #{reportIntervalMinute}
+            </if>
             <if test="status != null and status != ''">
                 and d.status = #{status}
             </if>
@@ -81,6 +86,7 @@
             <if test="deviceName != null">device_name,</if>
             <if test="deviceType != null">device_type,</if>
             <if test="deptId != null">dept_id,</if>
+            <if test="reportIntervalMinute != null">report_interval_minute,</if>
             <if test="status != null">status,</if>
             <if test="remark != null">remark,</if>
             <if test="createBy != null">create_by,</if>
@@ -94,6 +100,7 @@
             <if test="deviceName != null">#{deviceName},</if>
             <if test="deviceType != null">#{deviceType},</if>
             <if test="deptId != null">#{deptId},</if>
+            <if test="reportIntervalMinute != null">#{reportIntervalMinute},</if>
             <if test="status != null">#{status},</if>
             <if test="remark != null">#{remark},</if>
             <if test="createBy != null">#{createBy},</if>
@@ -112,6 +119,7 @@
             <if test="deviceName != null">device_name = #{deviceName},</if>
             <if test="deviceType != null">device_type = #{deviceType},</if>
             <if test="deptId != null">dept_id = #{deptId},</if>
+            <if test="reportIntervalMinute != null">report_interval_minute = #{reportIntervalMinute},</if>
             <if test="status != null">status = #{status},</if>
             <if test="remark != null">remark = #{remark},</if>
             <if test="createBy != null">create_by = #{createBy},</if>
@@ -123,6 +131,13 @@
         where id = #{id}
     </update>
 
+    <update id="updateRuntimeStatus" parameterType="MqttSensorDevice">
+        update mqtt_sensor_device
+        set status = #{status},
+            update_time = #{updateTime}
+        where id = #{id}
+    </update>
+
     <!-- ================= 删除 ================= -->
     <delete id="deleteMqttSensorDeviceById" parameterType="Long">
         delete from mqtt_sensor_device where id = #{id}
@@ -163,4 +178,27 @@
         </foreach>
     </select>
 
-</mapper>
\ No newline at end of file
+    <select id="selectOfflineDeviceList" resultMap="MqttSensorDeviceResult">
+        <include refid="selectMqttSensorDeviceVo"/>
+        where d.is_delete = '0'
+        and d.status = '0'
+        and (
+        exists (
+        select 1
+        from mqtt_sensor_data sd
+        where sd.device_id = d.id
+        and sd.is_delete = '0'
+        )
+        and (
+        select max(sd.create_time)
+        from mqtt_sensor_data sd
+        where sd.device_id = d.id
+        and sd.is_delete = '0'
+        ) &lt; DATE_SUB(
+        NOW(),
+        INTERVAL (IFNULL(d.report_interval_minute, 10) * 3) MINUTE
+        )
+        )
+    </select>
+
+</mapper>