multiple white list Switch between iphone and Macbook air failed

[gootoomoon]

How many whitelists do nrf51822 support?

I found is can be settting in ble_gap.h

#define BLE_GAP_WHITELIST_ADDR_MAX_COUNT (8)
#define BLE_GAP_WHITELIST_IRK_MAX_COUNT (8)

is that mean I can keep 8 iphone or pad white list at same time?

When I start adv, it will try to connect all of them one by one?

I test this with a iphone4s and a Nexus7 II, and it work well at "ble_app_hids_keyboard", but when I connect my ble device to a Macbook air it just work sometimes, and other times I need delete my ble device from Macbook and connect it again my device can only return work ok.

So how white list work? How IRK work?

Edit: format.

[Petter Myhre]

"The Link Layer may perform device filtering based on the device address of the peer device. Link Layer Device Filtering is used by the Link Layer to minimize the number of devices to which it responds." See Bluetooth Specification 4.1, Vol. 6, Part B, Section 4.3.

"The set of devices that the Link Layer uses for device filtering is called the White List." See Bluetooth Specification 4.1, Vol. 6, Part B, Section 4.3.1.

First, it is helpful to understand the difference between the GAP address types in BLE and the difference between the whitelist address and the whitelist IRK.

Remember to vote on the question and the answer if you find them useful.

The radio in the nRF51 Series is able to filter on 8 device addresses at the time, please see Section 16.1.13 in the nRF51 Series Reference Manual. This handles public and random static addresses.

The Accelerated Address Resolved (AAR) is able to filter on 16 IRKs at the time, please see Section 24 in the nRF51 Series Reference Manual. This handles private resolvable addresses.

The S110 SoftDevice doesn't support 16 IRKs, only 8. SoftDevice timing requirements enforces this limitation.

You can whitelist 8 random static or public addresses, and 8 IRKs at the time. iOS uses private resolvable addresses which means that you can whitelist 8 iOS devices at the time.

In regards to the problem with MacBook Air, you provide very little details, so I suggest you create a case in the MyPage support portal, or add it as a separate question, the FAQ clearly states that you should avoid asking multiple questions in one question.

[gootoomoon]

Thank you I will try it soon