diff --git a/handler/tool.go b/handler/tool.go
index 27d6a49..252e395 100644
--- a/handler/tool.go
+++ b/handler/tool.go
@@ -195,14 +195,13 @@ func subscribeAndHandleMessagesV6(ws *websocket.Conn, deviceId int) {
 	count := 0
 	//定时器，发送计数器
 	tCount := 0
-	var buf []byte
 	//计算帧率
 	for {
 		//从service获取当前帧
 		c := service.DeviceFrameCount[deviceId]
 		if c != count {
 			count = c
-			buf = service.Device1CurrentFrame.ToBytes()
+			buf := service.Device1CurrentFrame.ToBytes()
 			err2 := ws.WriteMessage(websocket.BinaryMessage, buf)
 			if err2 != nil {
 				log.Printf("send message to client err:%v", err2)