OpenWRT script to monitor status of Channels DVR and email on outage


I've had a few occasions where windows decided to update itself and reboot, leaving the Channels DVR offline until i logged into the machine. There's a variety of ways around this, including auto-login, which i decided i didn't want to do. My method was a simple monitoring script that runs every hour from my OpenWRT router.

# Port checker/alerter for Channels DVR, emails is service port is not responding.
# Tested on: OpenWrt 18.06.0 r7188-b0b5c64c22
# Save to /root/
# chmod +x
# To run hourly, add this line to System -> Scheduled tasks:
# 01 * * * * /root/ > /dev/null
# requires these packages:
# netcat
# mailsend
# Mail server with which to relay mail
# Use netcat to check the port... 
/usr/bin/netcat -zv --wait=10 8089
[ $RETVAL -eq 0 ] && echo Success
[ $RETVAL -ne 0 ] && mailsend -smtp -port 465 -t [email protected] -f [email protected] -sub 'ChannelsDVR offline' -ssl -auth -user [email protected] -pass "<password>" -M "The ChannelsDVR is offline, please check the service"
# end

Make sure to adjust the email server settings, and also the IP address of your Channels DVR host. Port (8089) is the default, adjust that as needed.


You can also set it to run as a service in windows and it will run logged in or not.


You should look into Pushover ( You can send yourself a push notification.