If you can stand to have the alerts for when there is no activity within the last full minute you can use DAC: [RELEASE] Device Activity Check - Get notifications for "inactive" devices
You would setup a group with 1 minute
Pick your notification "device" (where to send notifications)
Then to trigger it I would use a virtual button. So create a virtual button device and then select that button on DAC as the trigger. Create a rule to run every minute t push that button.
You could dial your refresh rule back since its only checking every minute, or you could let DAC do the refresh itself. Personally I would keep your other rule at put it to refresh back to 30 seconds. Or if you have the button push every minute on the minute you could do the refresh on the 50s mark every minute or something like that. I forget how precise you can be in RM with the times.
