1, if you have a USB to ttl line, disconnect the machine to ttl and connect the computer to read the flash data through ttl communication 2, if you have a chip programmer, heat gun remove the flash memory, lose the programmer to read the data 3, if you set the highest permission to the ftp router and remember the FTP account password, Then you can try to read the data through FTP 4, there is a difficult way, if the router side runs some plug-in with additional web control such as plex, you can consider the plug-in and then put the right to read the data, but it is not guaranteed to succeed, this is a forced way to try I generally use method 1, ttl big method really happy