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GUIDE: One shot events.
Event Rules needs to turn to false first before they can trigger a new notification, that is a new SMS, email, blinking icon etc. But sometimes you want a new event for each signal.
You have a device which sends SOS signals. Each time a new (SOS) signal comes from the device you want a new event to be triggered. But since there is no signals in between that turns the Event Rule false, no new events are triggered.
You solve this by using "One shot events".
To turn an Event Rule into a "One Shot Event" click on "Show advanced options" In Step 4. and then add the exact same Expression that triggers the event as an "end expression".
Set "SOS" "Equals" "True" both as the "Expression" in Step 4, and as an "end expression" under "Show advanced options".
Now the event will trigger for each SOS signal that comes in.