i have a d-link dwr-921 lte router running openwrt 18.06.4
the router frequently loses its internet connection, then i mostly have to reboot, connect the router to a computer via network cable and run the commands
# ssh email@example.com and # ifup wwan
manually to bring the router back online.
i am wondering if its possible to automate this, so the router automatically issues the "ifup wwan" command while booting or after booting (so i only have to reboot the router when it loses its internet connection, with no need to go to the command line in addition).
my knowledge about linux is limited, but i suppose this should be done by a boot script, right? unfortunately, i have no experience with writing scripts :-/
what do you think? what would be the best way to set up openwrt to run the "ifup wwan" command automatically at boot?
your help would be much appreciated.