nRF Connect SDK Bluetooth Extend Advertsing Scanning with duplicate filter

[Tovms zhangsan]

Hi， i'm use latest ncs develop bluetooth extend advertising, and i'm try use west build -t menuconfig to config scan filter config

such as BT_CTLR_DUP_FILTER_LEN or BT_CTLR_DUP_FILTER_ADV_SET_MAX, but it didn't work.

Dose this config used in softdevice? or pleast tell me more information about softdevice process policy(i'm not able to see source code)

[Amanda Hsieh]

Hi, 

Take a look at the Limitations:

DRGN-8628: Setting Filter_Duplicates in LE Set Scan Enable and LE Set Extended Scan Enable commands does not take effect

The host receives all advertisements from advertisers in advertising report events even if Filter_Duplicates is set in LE Set Scan Enable and LE Set Extended Scan Enable. Filter_Duplicates cannot guarantee that all duplicate advertising reports are filtered out, because the controller has a limited “cache” of known advertising reports.

Workaround: Filter out the duplicate advertising reports in the application.

Regards,
Amanda