Translated using an online translator:
Neither of these two methods works on the latest firmware!
- mtd - command not found...
- when trying to execute the file, several lines of hieroglyphs appear and then ssh cannot be used, everything is printed in hieroglyphs before restarting the ssh connection, after restarting everything remains as it was!
P.S. By the way, instead of scp, it is easier for me to use:
Curl --url <url_of_flash-upgrade.bin> --output /tmp/flash-upgrade.bin
- it works!