The current firmware was RUT2XX_R_00.01.14.3. I tried to downgrade it for some testing by running "sysupgrade /tmp/RUT2XX_R_00.01.13.3_WEBUI.bin && exit" and it led me to Writing from <stdin> to firmware ... [w]. I didn't know why it did that so I ctrl+C it. Then it took me to a weird prompt @RUT240:(unreachable)/root#. I didn't know what to do so I exited the session and now I can't log in anymore. I replugged the power and all I see now are 5 solid green lights and I can't reach it via WebUI or SSH anymore. I held down the reset button for more than 5 seconds and nothing happened. I also tried the bootloader menu by holding the reset button down while applying power and held it for another 5 seconds and still nothing. Please advise me on how to fix it.
Here's the process:
root@RUT240:~# sysupgrade /tmp/RUT2XX_R_00.01.13.3_WEBUI.bin && exit
Collected errors:
* file_sha256sum_alloc: Failed to open file /etc/quagga/bgpd.conf: No such file or directory.
* file_sha256sum_alloc: Failed to open file /etc/quagga/ospf6d.conf: No such file or directory.
* file_sha256sum_alloc: Failed to open file /etc/quagga/ospfd.conf: No such file or directory.
* file_sha256sum_alloc: Failed to open file /etc/quagga/ripd.conf: No such file or directory.
* file_sha256sum_alloc: Failed to open file /etc/quagga/ripngd.conf: No such file or directory.
Saving config files...
killall: watchdog: no process killed
Sending TERM to remaining processes ... logd rpcd logtrigger netifd odhcpd eventslogd gsmd crond modem_sync mwan qmi-proxy mdcollectd port_event_chec sh dnsmasq ntpclient ubusd askfirst sh uhttpd sleep sleep sleep
Sending KILL to remaining processes ... mwan gsmctl askfirst
Switching to ramdisk...
sh: 0: unknown operand
Performing system upgrade...
/lib/ledblink.sh: line 21: can't create /sys/class/leds/status_green/brightness: nonexistent directory
/lib/ledblink.sh: line 21: can't create /sys/class/leds/status_red/brightness: nonexistent directory
Unlocking firmware ...
Writing from <stdin> to firmware ... [w]
[w][w]t
[w]^C
@RUT240:(unreachable)/root# ls
@RUT240:(unreachable)/root# cd
-ash: cd: can't cd to /root: No such file or directory
@RUT240:(unreachable)/root# ls
@RUT240:(unreachable)/root# ls /
bin etc mnt proc sys usr
dev lib overlay sbin tmp var
@RUT240:(unreachable)/root# exit