ZBT-WD323 images unusable - proposed workaround

For Developers
5

OK sounds like it's not a major issue, I'll look into seeing if I can draft a PR.
Also for reference, I just found this in the stock FW in /bin/feed_dog.sh - looks like this is how they'd implemented the watchdog (looks pretty hacky):

#!/bin/sh
wd_gpio="21"

echo $wd_gpio > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio$wd_gpio/direction

while [ 1 ]
do
    echo 1 >/sys/class/gpio/gpio$wd_gpio/value
    sleep 1
    echo 0 >/sys/class/gpio/gpio$wd_gpio/value
    sleep 1
	
	echo 1 >/sys/class/gpio/gpio$wd_gpio/value
    sleep 1
    echo 0 >/sys/class/gpio/gpio$wd_gpio/value
    sleep 1
	
	echo 1 >/sys/class/gpio/gpio$wd_gpio/value
    sleep 1
    echo 0 >/sys/class/gpio/gpio$wd_gpio/value
    sleep 1
done
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