Ok, my slightly more complicated spin on your rule. I really wanted to send some sort of "ping" in the push monitor so I did a time diff between runs. Also added a repeating notification. My interval in UK is 120s, 2x is 4 minutes, hence the delay on the notification is 5 minutes.
This eliminated the virtual device driver to monitor UK, everything is done in the rule.
Also hitting the rule endpoint seems to give a better idea of hub response time than just checking the Web UI.
The rule itself
This is the one that hits the rule endpoint
This is what catches the response
(The median ping here should be close to your heartbeat time)
