Establishing a connection with a bonded phone

RE: Establishing a connection with a bonded phone

run_ar — Wed, 30 Sep 2020 14:14:09 GMT

1. Sorry, I did not realize you where also asking about scanning. Did you already read the documentation her: Whitelist?

2. The IRK will normally be exchanged at the end of the pairing process. If the peer devices uses a resolvable private address you need the IRK.

3. Yes, it's stored when exchanged. But the application has to tell the SD to use the whitelist. As mentioned in my previous reply.

4. Did you already look at the hids_keyboard example? Main.c: line 353. For scanning look atthe function nrf_ble_scan_start in nrf_ble_scan.c. This takes a struct called: nrf_ble_scan_t -> ble_gap_scan_params_t set the filter policy to whitelist.

RE: Establishing a connection with a bonded phone

Werner.Loser — Tue, 29 Sep 2020 06:31:31 GMT

Hello,

sorry if I ask the questions differently again, but the answer does not help me.

Question 1

On the peripheral side the connection with Advertising works if the whitelist is configured ( init.config.ble_adv_whitelist_enabled = true; ).

But on the central side I did not understand how can I start a scan with only one or more whitelist entriy/entries.

Question 2

Is it correct that I need IRK in my case?

Question 3

The whitelist is completely managed by the peer manager - is that correct?

Question 4

Again, are there one or more examples or which functions with which parameters do I have to call for this?

Thank you in advance

Best regards,
Werner Loser

RE: Establishing a connection with a bonded phone

run_ar — Mon, 28 Sep 2020 11:46:06 GMT

The Peer manager has a function to configure the whitelist. If you look at the ble_hids_keyboard example you can see the function: whitelist_set being called before the call to ble_advertising_start. This function will end up calling sd_ble_gap_whitelist_set to configure the sd. The maximum number of entries are defined in ble_gap.h:

/**@brief Maximum amount of addresses in the whitelist. */
#define BLE_GAP_WHITELIST_ADDR_MAX_COUNT (8)


/**@brief Maximum amount of identities in the device identities list. */
#define BLE_GAP_DEVICE_IDENTITIES_MAX_COUNT (8)

RE: Establishing a connection with a bonded phone

Werner.Loser — Mon, 21 Sep 2020 10:29:16 GMT

Hello,

I have read the content in the links.
In addition, I worked through the following tutorials and read several blogs
devzone.nordicsemi.com/.../bluetooth-smart-and-the-nordics-softdevices-part-2
devzone.nordicsemi.com/.../bluetooth-smart-and-the-nordics-softdevices-part-1

Sorry, but I'm still missing the entry point to establish a connection via the peer manager (prefix pm) with an entry in the whitelist.
Is it correct that I need IRK in my case?
To make it easier, I would start with only one entry in the whitelist (Only 1 Device bonded)
The whitelist is completely managed by the peer manager - is that correct?
What is the maximum size of the whitelist?
Again, are there one or more examples or which functions with which parameters do I have to call for this?

Thank you in advance

Best regards,
Werner Loser

RE: Establishing a connection with a bonded phone

run_ar — Tue, 15 Sep 2020 14:58:19 GMT

Hi,

If it doesn't matter which one of the bonded phones connect to your device, the whitelist can be used while advertising to avoid connections from unknown devices. If you want to identify the device after connection you can look at the function peer_id_get There is a high level explanation in https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/lib_pm_functionality.html?cp=7_1_3_2_7_1_1#lib_pm_functionality_peers