add read write lock to dmx data

websocket/client.go

@@ -89,10 +89,10 @@ func (c *Client) Read() {
 	}
 
 	c.conn.SetReadDeadline(time.Now().Add(pongWait))
-	for c.Connected {
-		c.conn.SetReadDeadline(time.Now().Add(pongWait))
-		msgType, msg, err := c.conn.ReadMessage()
 
+	for c.Connected {
+		msgType, msg, err := c.conn.ReadMessage()
+		c.conn.SetReadDeadline(time.Now().Add(pongWait))
 		if err != nil {
 			c.handleError(fmt.Errorf("read error (ip:%s): %w", c.ip, err))
 			return