St advertises that the security app runs locally, however there are reports from other community members that have yet to validate that statement. I don’t use the security app because there are too many disadvantages. You may find these two threads interesting:
Ever unplug your hubs ethernet and see just what it can locally process?
One would think it would process SHM (Smart Home Monitor), ensuring your alarm and designated lights would trigger during an invasion, water leak or smoke… Nope, nothing triggered… Even with ethetnet connected, V2 SHM no longer triggers alarms or lights during a smoke alarm or co2 test, V1 did, only way to test is to actually force a real alarm.
How about a remote control or wall controller? Nope…
Maybe a common ST SmartApp like Double Tap, No again…
Logging? Nope… App use? Nope…
How about a simple motion detector turning a light on, Yes, finally…
Maybe another switch able to trigger another device, yes…
Automatically turn a device off after a specified amount of time, yep…
Simple light triggering is the only…