On 27/08/2018 18:52, Marcel Partap wrote:
[…]
https://openwrt.org/docs/guide-developer/ubus/system has watchdog information
Well, I was hoping for a watchdog daemon packaged in the repo to easily solve
my issue..
I already set up a timer switch to cut electricity to both cable modem and
router at 3AM + 3PM to reset them, but that is just a crude last-resort
solution to have me cut off from remote access for 12 hours at most.
That said, you may be seeing:
https://dev.openwrt.org/ticket/12121 where people have reported
watchdog resets causing hard lockup on and off for a few years.
Thanks for the pointer, though I doubt that's my problem, as the issue has
started before all of my attempts to activate the watchdog.
Regards,
#marcel
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If your hardware does not have a watchdog but you have a USB port you
can use a "usb watchdog"
They are cheap devices used by cryptominers on PCs that usually lack a
hardware watchdog.
They usually come without linux support like all chinese stuff, but it's
pretty simple to sniff the serial communication and
write a script to send hex values to have it work on Linux/OpenWrt. You
just need to install serial dongle drivers to communicate with it.
https://www.davidgouveia.net/2018/02/how-to-create-your-own-script-for-a-usb-watchdog/
What he does with python can be done also with a shell script,
https://unix.stackexchange.com/questions/118247/echo-bytes-to-a-file
You will probably need to wire up the usb watchdog to some switch that
turns off and on the power to your device though.
-Alberto
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