The ComfilePi's SoC has an internal watchdog timer that can be used to automatically reboot the system should it ever become unresponsive.

First, verify that the /dev/watchdog device exists:

pi@raspberrypi:~ $ ls -al /dev/watchdog*
crw------- 1 root root  10, 130 Feb 14  2019 /dev/watchdog
crw------- 1 root root 251,   0 Feb 14  2019 /dev/watchdog0

Uncomment the following lines in the file /etc/systemd/system.conf:

RuntimeWatchdogSec=10
ShutdownWatchdogSec=10min

Check if the watchdog service is running with the following command:

pi@raspberrypi:~ $ systemctl | grep watchdog
watchdog.service         loaded active running   watchdog daemon 

If the watchdog.service is not running, start it with the following command:

sudo systemctl start watchdog.service

To test if the watchdog service is working, first, obtain root privileges and then initiate a forkbomb:

pi@raspberrypi:~ $ sudo su
root@raspberrypi:/home/pi# :(){ :|:& };:

If the watchdog is working, then after about 10 to 20 seconds the ComfilePi should reboot.

ComfilePi - Industrial Raspberry Pi Panel PC