Is there a way to be notified when a relay goes offline?
Hello,
If your relay is running as a systemd service, you may add any action to ExecStopPost.⁽¹⁾ That includes sending an email or any other means of notification.
Cheers ____ ⁽¹⁾ https://www.freedesktop.org/software/systemd/man/latest/systemd.service.html...