You could try to use some Bluetooth scanner app. I personally like/use nRF Connect.
I am using the Notification App that’s auto generated from estimote cloud, to wake the beacon is pretty fast. However, to sleep the beacon seems to take quite a while.
If you’re using the Notification app, then the delay comes from the app/Proximity SDK. Basically, when Proximity SDK completely stops hearing from a beacon, it’ll wait up to 30 seconds to re-detect it, before it generates an “exit” event.
This is because it’s pretty normal for the iOS and Android Bluetooth APIs to have large gaps in scanning/reporting the scan results, so the 30 seconds act as a buffer to prevent false exit events.