ScanFilter is not working

[piotrek-dosell]

Describe the bug ScanFilter is not working Tested with setDeviceName() only Tested with setServiceUuid() only

To Reproduce Look at this branch: https://github.com/piotrek-dosell/RxAndroidBle/tree/scanfilter_issue

1. Change lookFor to a Ble name present in your environment Line 73 val lookFor = "Dosell"

Expected behavior

1. Now comment Line 75: .setDeviceName(lookFor) https://github.com/dariuszseweryn/RxAndroidBle/commit/e1e2f64145e772732f269d27c16a54a9662d0648#diff-180e9e7bbbb041e547483ad7c95469f2010828f143aaf3643a82fe4fd3bf72e6R75 Smartphone (please complete the following information):
   • Device: Samsung SM-G398FN (and another Sony device)
   • OS: Android 11
   • Library version: e35ae86 - (origin/master, origin/HEAD, master) Migrated BleCannotSetCharacteristicNotificationExceptionTest. (3 months ago)

Logs from the application when bug occurs (this will greatly help in quick understanding the problem) Just run the sample and try with and without setDeviceName()

Additional context Add any other context about the problem here.

[dariuszseweryn]

As discussed offline:

• Offloaded ScanFilters may or may not work depending on the OS/vendor peculiarities. You could try using emulated scan filters.
• Offloaded ScanFilters usually check only the primary Advertisement packet. If a name (or any other scan property) is transmitted in the Extended Advertisement Packet will most likely not work because the Android does not send Extended Advertisement Inquiry when doing scans with ScanFilters. If you control the peripheral you should be able to transmit the filter elements in the primary Advertisement Packet