diff --git a/main.c b/main.c
index 8f88225..368badc 100644
--- a/main.c
+++ b/main.c
@@ -10,6 +10,11 @@
 #include "debug_print/debug_print.h"
 #include <errno.h>
 
+// UUID generation functions (defined in mqtt/WebSocket.c)
+typedef unsigned char uuid_t[16];
+extern void uuid_generate(uuid_t out);
+extern void uuid_unparse(uuid_t uu, char *out);
+
 // 全局变量声明
 jt_led_or_group_package_t tags;
 jt_led_or_group_package_t led_ctrl;
@@ -88,13 +93,16 @@ typedef struct {
     int light_r;                // 红色（0或1）
     int light_g;                // 绿色（0或1）
     int light_b;                // 蓝色（0或1）
-    bool reported;              // 是否已上报
+    bool reported;              // 是否已上报亮灯成功
+    bool lightOffReported;      // 是否已上报灭灯
     time_t createTime;          // 创建时间
+    int duration;               // 亮灯持续时间（秒）
 } pending_light_task_t;
 pending_light_task_t pendingLightTasks[MAX_PENDING_LIGHT_TASKS] = {0};
 int pendingLightTaskCount = 0;
 pthread_mutex_t lightTaskMutex = PTHREAD_MUTEX_INITIALIZER;
 pthread_t pt_heartbeat_check;
+pthread_t pt_light_off_check;
 int lightbars_size=0;
 int lightbars_count=0;
 uint8_t changecolor=0;
@@ -160,14 +168,16 @@ void hmacsha1_hex(char *key, char* data, char *signhex, int signhex_len);
 void *thread_mqtt_status_check(void *arg);
 void *thread_station_heartbeat(void *arg);
 void *thread_heartbeat_check(void *arg);
+void *thread_light_off_check(void *arg);
 void *thread_simulate_light(void *arg);
 void *thread_all_light(void *arg);
 void *thread_simulate_mqtt_topic(void *arg);
 void update_lightbar_heartbeat(uint32_t tagCode);
 void report_lightbar_login(uint32_t tagCode);
 void report_lightbar_logout(uint32_t tagCode);
-void add_pending_light_task(uint32_t tagCode, const char *taskId, int beep, int flash, int r, int g, int b);
+void add_pending_light_task(uint32_t tagCode, const char *taskId, int beep, int flash, int r, int g, int b, int duration);
 void report_light_success(uint32_t tagCode);
+void report_light_off(uint32_t tagCode);
 
 /*================================================================================*/
 // 上报灯条子设备登录
@@ -213,7 +223,7 @@ void report_lightbar_login(uint32_t tagCode) {
 
 /*================================================================================*/
 // 添加待确认的亮灯任务
-void add_pending_light_task(uint32_t tagCode, const char *taskId, int beep, int flash, int r, int g, int b) {
+void add_pending_light_task(uint32_t tagCode, const char *taskId, int beep, int flash, int r, int g, int b, int duration) {
     pthread_mutex_lock(&lightTaskMutex);
     
     // 检查是否已存在
@@ -226,9 +236,10 @@ void add_pending_light_task(uint32_t tagCode, const char *taskId, int beep, int
             pendingLightTasks[i].light_r = r;
             pendingLightTasks[i].light_g = g;
             pendingLightTasks[i].light_b = b;
+            pendingLightTasks[i].duration = duration;
             pendingLightTasks[i].createTime = time(NULL);
-            LOG_I("Updated pending light task for tag %08X, taskId: %s, beep: %d, flash: %d, RGB: %d,%d,%d\n", 
-                  tagCode, taskId, beep, flash, r, g, b);
+            LOG_I("Updated pending light task for tag %08X, taskId: %s, beep: %d, flash: %d, RGB: %d,%d,%d, duration: %d\n", 
+                  tagCode, taskId, beep, flash, r, g, b, duration);
             pthread_mutex_unlock(&lightTaskMutex);
             return;
         }
@@ -245,9 +256,11 @@ void add_pending_light_task(uint32_t tagCode, const char *taskId, int beep, int
         pendingLightTasks[pendingLightTaskCount].light_g = g;
         pendingLightTasks[pendingLightTaskCount].light_b = b;
         pendingLightTasks[pendingLightTaskCount].reported = false;
+        pendingLightTasks[pendingLightTaskCount].lightOffReported = false;
         pendingLightTasks[pendingLightTaskCount].createTime = time(NULL);
-        LOG_I("Added pending light task for tag %08X, taskId: %s, beep: %d, flash: %d, RGB: %d,%d,%d\n", 
-              tagCode, taskId, beep, flash, r, g, b);
+        pendingLightTasks[pendingLightTaskCount].duration = duration;
+        LOG_I("Added pending light task for tag %08X, taskId: %s, beep: %d, flash: %d, RGB: %d,%d,%d, duration: %d\n", 
+              tagCode, taskId, beep, flash, r, g, b, duration);
         pendingLightTaskCount++;
     } else {
         LOG_I("Pending light task queue full!\n");
@@ -317,6 +330,68 @@ void report_light_success(uint32_t tagCode) {
     pthread_mutex_unlock(&lightTaskMutex);
 }
 
+/*================================================================================*/
+// 上报灭灯（调用时必须已持有lightTaskMutex锁）
+void report_light_off(uint32_t tagCode) {
+    // 查找对应的已上报亮灯成功的任务
+    for (int i = 0; i < pendingLightTaskCount; i++) {
+        if (pendingLightTasks[i].tagCode == tagCode && 
+            pendingLightTasks[i].reported && 
+            !pendingLightTasks[i].lightOffReported) {
+            
+            // 构建上报topic和payload
+            char topic[256] = {0};
+            char payload[1024] = {0};
+            char tagStr[16] = {0};
+            char uuid_str[37] = {0};
+            uuid_t uuid;
+            
+            // 生成随机UUID
+            uuid_generate(uuid);
+            uuid_unparse(uuid, uuid_str);
+            
+            // 将tagCode转换为字符串（格式：AD10 + 8位十六进制）
+            snprintf(tagStr, sizeof(tagStr), "AD10%08X", tagCode);
+            
+            // 构建topic: /sys/WcSubLightStrip/{deviceName}/thing/property/post
+            snprintf(topic, sizeof(topic), "/sys/WcSubLightStrip/%s/thing/property/post", tagStr);
+            
+            // 获取当前时间戳（毫秒）
+            struct timeval tv;
+            gettimeofday(&tv, NULL);
+            long long timestamp = (long long)tv.tv_sec * 1000 + tv.tv_usec / 1000;
+            
+            // 使用任务中的真实数据构建payload
+            snprintf(payload, sizeof(payload),
+                "{\"id\":\"%s\",\"version\":\"1.0\",\"arg\":{\"beep\":{\"value\":%d,\"time\":%lld},\"flash\":{\"value\":%d,\"time\":%lld},\"light\":{\"value\":{\"R\":%d,\"G\":%d,\"B\":%d},\"time\":%lld}},\"method\":\"thing.service.lightOperate.invoke\",\"time\":%lld}",
+                uuid_str,
+                pendingLightTasks[i].beep,
+                timestamp,
+                pendingLightTasks[i].flash,
+                timestamp,
+                pendingLightTasks[i].light_r,
+                pendingLightTasks[i].light_g,
+                pendingLightTasks[i].light_b,
+                timestamp,
+                timestamp);
+            
+            LOG_I("Reporting light off - topic: %s\n", topic);
+            LOG_I("Reporting light off - payload: %s\n", payload);
+            LOG_I("Tag: %08X, UUID: %s\n", tagCode, uuid_str);
+            
+            // 发送MQTT消息
+            mqtt_utils_publish(&mqtt_config, topic, 0, payload, strlen(payload));
+            
+            // 标记为已上报灭灯
+            pendingLightTasks[i].lightOffReported = true;
+            
+            return;
+        }
+    }
+    
+    LOG_I("No pending light task found for light-off report for tag %08X\n", tagCode);
+}
+
 /*================================================================================*/
 // 上报灯条子设备登出
 void report_lightbar_logout(uint32_t tagCode) {
@@ -435,6 +510,39 @@ void *thread_heartbeat_check(void *arg) {
     return NULL;
 }
 
+// 灭灯检测线程 - 每5秒检查一次
+void *thread_light_off_check(void *arg) {
+    LOG_I("Light off check thread started\n");
+    
+    while (1) {
+        sleep(5);  // 每5秒检查一次
+        
+        time_t now = time(NULL);
+        
+        pthread_mutex_lock(&lightTaskMutex);
+        
+        for (int i = 0; i < pendingLightTaskCount; i++) {
+            // 只检查已上报亮灯成功但未上报灭灯的任务
+            if (pendingLightTasks[i].reported && !pendingLightTasks[i].lightOffReported) {
+                time_t elapsed = now - pendingLightTasks[i].createTime;
+                
+                // 检查是否超过持续时间
+                if (elapsed >= pendingLightTasks[i].duration) {
+                    LOG_I("Light-off triggered for tag %08X - elapsed %ld seconds (duration: %d)\n", 
+                          pendingLightTasks[i].tagCode, (long)elapsed, pendingLightTasks[i].duration);
+                    
+                    // 上报灭灯
+                    report_light_off(pendingLightTasks[i].tagCode);
+                }
+            }
+        }
+        
+        pthread_mutex_unlock(&lightTaskMutex);
+    }
+    
+    return NULL;
+}
+
 /*================================================================================*/
 // 模拟亮灯线程函数 - 每30秒发送一次亮灯任务
 void *thread_simulate_light(void *arg){
@@ -1723,7 +1831,7 @@ void mqtt_init(){
     mqtt_config.tracelevel=MQTTASYNC_TRACE_PROTOCOL;
     mqtt_config.retain=0;
     mqtt_config.port=mqtt_port;
-    mqtt_config.keepalive=60;
+    mqtt_config.keepalive=300;
 
     memset(mqtt_config.clientid,0,sizeof(mqtt_config.clientid));
     memcpy(mqtt_config.clientid, clientid, strlen(clientid)+1);
@@ -2536,7 +2644,7 @@ void *thread_mqtt_recv(void *arg){
                             // flash值需要转换：changeflash=1表示常亮(上报0)，changeflash=3表示闪烁(上报1)
                             int flash_value = (changeflash == 3) ? 1 : 0;
                             if(strlen(taskId) > 0) {
-                                add_pending_light_task(tagCode, taskId, changesound, flash_value, r_val, g_val, b_val);
+                                add_pending_light_task(tagCode, taskId, changesound, flash_value, r_val, g_val, b_val, mqtt_parm.msg_duration);
                             }
                         }
                     }
diff --git a/mqtt_utils/mqtt_utils.c b/mqtt_utils/mqtt_utils.c
index 387905e..15e18ba 100644
--- a/mqtt_utils/mqtt_utils.c
+++ b/mqtt_utils/mqtt_utils.c
@@ -423,6 +423,21 @@ void mqtt_utils_connected(void *context, char *cause){
     }
     pthread_mutex_unlock(&heartbeatMutex);
     
+    // 启动灭灯检测线程（只启动一次）
+    static bool light_off_thread_started = false;
+    if (!light_off_thread_started) {
+        extern pthread_t pt_light_off_check;
+        extern void *thread_light_off_check(void *arg);
+        int ret = pthread_create(&pt_light_off_check, NULL, thread_light_off_check, NULL);
+        if(ret != 0) {
+            LOG_I("pthread_create light_off_check fail\n");
+        } else {
+            LOG_I("pthread_create light_off_check success\n");
+            pthread_detach(pt_light_off_check);
+            light_off_thread_started = true;
+        }
+    }
+    
     // 启动心跳检测线程（只启动一次）
     static bool heartbeat_thread_started = false;
     if (!heartbeat_thread_started) {