CODEWITHSUNDEEP
androidibeacon-androidaltbeacon
Vamsi Challa
Vamsi Challa

Reputation: 11109

AltBeacon Library - reduce bluetooth scan period

I am using AltBeacon Library and trying to detect beacons. I want to reduce the time between the scan cycles.

mBeaconManager.setBackgroundScanPeriod(30000l);

As per documentation the above line should set the background scan period to 3 seconds. But, i still see that the scan period is 5 mins (300000 ms). Am i missing anything?

Upvotes: 1

Views: 4028

Answers (1)

davidgyoung
davidgyoung

Reputation: 65025

There are actually two method calls:

mBeaconManager.setBackgroundScanPeriod(1100l);
mBeaconManager.setBackgroundBetweenScanPeriod(30000l);

The first call sets how long a bluetooth scan will last, and the second call sets how long there will be between bluetooth scans. The commands above effectively do a 1.1 second scan every 31.1 seconds.

You should generally set the backgroundScanPeriod to 1100 ms or more, because beacons that advertise exactly once per second have a slight chance of being missed if their transmission is always on the boundary of when you start and stop scanning.

Upvotes: 7

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