diff --git a/handler/device.go b/handler/device.go
index 565ca06..3332c9d 100644
--- a/handler/device.go
+++ b/handler/device.go
@@ -233,49 +233,66 @@ func GetRealTimeImage(c *gin.Context) {
 func subscribeAndHandleMessages(ws *websocket.Conn, device_id int) {
 	ctx := context.Background()
 	pubsub := worker.RedisClient.Subscribe(ctx, strconv.Itoa(device_id)+"_frames_msgs")
-	//生成唯一连接uuid
+	// 生成唯一连接 uuid
 	con_id := uuid.New().String()
 	online_conn_key := "device_" + strconv.Itoa(device_id) + "_online_conn_ids"
-	//加入设备在线连接集合
-	worker.SetRedisSetAdd(online_conn_key, con_id)
+	// 加入设备在线连接集合
+	worker.SetRedisSetAddWithExpire(online_conn_key, con_id, time.Minute*5)
 	defer pubsub.Close()
 	defer ws.Close()
 	ch := pubsub.Channel()
 	var check_cnt int
-	for msg := range ch {
-		var res3 []byte
-		var msgObj proto.Message
-		if msg.Payload != "" {
-			msgObj.Type = "img"
-			msgObj.Msg = msg.Payload
-			msgObj.From_user_id = -1
-			res3, _ = json.Marshal(msgObj)
-		} else {
-			if check_cnt < 5 {
-				check_cnt++
-				time.Sleep(time.Millisecond * 200)
-				continue
+	for {
+		select {
+		case msg, ok := <-ch:
+			if !ok {
+				// 通道关闭或没有消息，每秒尝试检测连接
+				for {
+					err := ws.WriteControl(websocket.PingMessage, []byte{}, time.Now().Add(time.Second))
+					if err != nil {
+						clientsMux.Lock()
+						clients[ws] = false
+						clientsMux.Unlock()
+						// 查看是否还有其他连接，没有则设置 is_play 为 0
+						if worker.IsContainKey(online_conn_key) == false {
+							worker.SetRedisWithExpire(strconv.Itoa(device_id)+"_is_play", "0", time.Minute*5)
+							fmt.Println("device_id:", device_id, " has set is_play to 0")
+						}
+						return
+					}
+					time.Sleep(time.Second)
+				}
+			}
+			var res3 []byte
+			var msgObj proto.Message
+			if msg.Payload != "" {
+				msgObj.Type = "img"
+				msgObj.Msg = msg.Payload
+				msgObj.From_user_id = -1
+				res3, _ = json.Marshal(msgObj)
+			} else {
+				if check_cnt < 5 {
+					check_cnt++
+					time.Sleep(time.Millisecond * 200)
+					continue
+				}
+				check_cnt = 0
+				msgObj.Type = "check"
+				msgObj.Msg = "check"
+				msgObj.From_user_id = -1
+				res3, _ = json.Marshal(msgObj)
+			}
+			// fmt.Println("send message to client length:", len(res3))
+			err2 := ws.WriteMessage(websocket.TextMessage, res3)
+			if err2 != nil {
+				clientsMux.Lock()
+				clients[ws] = false
+				clientsMux.Unlock()
+				fmt.Println("send message to client err:", err2)
+				worker.SetRedisSetRemove(online_conn_key, con_id)
+				return
 			}
-			check_cnt = 0
-			msgObj.Type = "check"
-			msgObj.Msg = "check"
-			msgObj.From_user_id = -1
-			res3, _ = json.Marshal(msgObj)
-		}
-		//fmt.Println("send message to client length:", len(res3))
-		err2 := ws.WriteMessage(websocket.TextMessage, res3)
-		if err2 != nil {
-			clientsMux.Lock()
-			clients[ws] = false
-			clientsMux.Unlock()
-			fmt.Println("send message to client err:", err2)
-			worker.SetRedisSetRemove(online_conn_key, con_id)
-			break
 		}
 	}
-	//查看是否还有其他连接，没有则设置is_play为0
-	if worker.IsContainKey(online_conn_key) == false {
-		worker.SetRedisWithExpire(strconv.Itoa(device_id)+"_is_play", "0", time.Minute*5)
-		fmt.Println("device_id:", device_id, " has set is_play to 0")
-	}
+
 }
diff --git a/worker/redis.go b/worker/redis.go
index 9b032a7..a9957bb 100644
--- a/worker/redis.go
+++ b/worker/redis.go
@@ -292,6 +292,22 @@ func SetRedisSetAdd(key string, value string) bool {
 	return true
 }
 
+// 设置set,添加元素
+func SetRedisSetAddWithExpire(key string, value string, expire time.Duration) bool {
+	ctx := context.Background()
+	err := RedisClient.SAdd(ctx, key, value).Err()
+	if err != nil {
+		fmt.Println("Error setting key: %v", err)
+		return false
+	}
+	err = RedisClient.Expire(ctx, key, expire).Err()
+	if err != nil {
+		fmt.Println("Error setting key: %v", err)
+		return false
+	}
+	return true
+}
+
 // 设置set,删除元素
 func SetRedisSetRemove(key string, value string) bool {
 	ctx := context.Background()