GeoEvent filter：'enter' and 'inside' in the geofence function have a same result

[chenjun]

I have made a geoevent service to detect a car to enter a geofence and I want to send a Email when the car enter the geofence, but it will keep sending when the car inside the geofence until it is outside.I dont know how to deal with it.

[XanderBakker]

There should be a difference (Inside should give multiple results, while Enter should only provide one):

and...

Source: ArcGIS Help (10.2, 10.2.1, and 10.2.2)

Are you sure that it enters the GeoFence only once? If it is a narrow GeoFence following the route of a car, GPS imprecision may invoke multiple entries.