Is it possible in a HID mode disable bonding to HID?

[Mikhail]

Hi!

SDK15, s132, SD6.0.0, nRF52832

I have nRF52832 in central mode and some bonded HID devices and another nRF52832 peripherial devices.

Now in the my central nRF52832 I start advertise with HID services. If any smartphon wants to bond with my device, it can bond with passkey. 

How to make on my nRF52832 HID device that all boneded devices will works and connect, but there will be no bond request from any not bonded smartphon?

[Hung Bui]

Hi, 

Please correct me if I'm wrong. You have a central device that connect to some HID devices. Now on your central device you also want it to be a HID peripheral so the phone can connect to it ? And you only wants some phones which are bonded to connect to it. Any other phones shouldn't be able to connect and bond with it ? 

If it's the case, you can use whitelist to block any non-bonded phone to connect to your device. You can have a special mode (pairing mode) that whitelist is disabled to allow unknown device to connect to your device.  

[Mikhail]

May be you mean instead of whitelist

static void peer_manager_init(void)?

[Hung Bui]

To find more about whitelisting, you can have a look at the ble_app_hids_mouse example. Have a look at the documentation here.

You can call ble_advertising_restart_without_whitelist() to start the mode without whitelist (accepting new bond)

[Mikhail]

Yes, I understand about whitelist. But I think that this is not that case. I already use whitelist. When I try to bond- whitelist disable for receive all devices around. When I work in normal mode and don't need any bond, I use enable whitelist. And connected only to previously bonded devices. But !!!! if works in this mode, if device advertise with hid service, possible to connect with another smartphone and bond with passkey.

[Hung Bui]

I am not sure you understand how whitelisting work. 

When you apply whitelisting, any other phone that is not in the list will not be able to connect to your device. So there is no way they can bond or pair, regardless what service you have on your device. HID is just a normal service. 

Please double check if whitelist is really enabled. Please test with mouse/keyboard example in the SDK. 

[Mikhail]

I understand how whitelist works. When I have bonded devices, I restart nRF and activate whitelist. At this case I scan only for whitelist devices. But if I also with scan from whitelist start advertise with hid service, possible to bond any smartphone. 

It is true. But may be due to I use whitelist only for central side? And should use also for peripherial? But I think that whitelist common for central and peripherial.

[Hung Bui]

There are 2 different whitelists here, one for scanning and one when advertising. They are not related.

 One has the list of peripheral you bonded to (when scanning) and one should have the list of the phone you connected to. 

[Mikhail]

Oh!

Ok, should I activate second WL for advertising?

In wich example can I see how to use it?

[Hung Bui]

Please have a look in our HID examples, for example the ble_app_hids_mouse. After disconnect it will do directed advertising and after that it will do advertising with whitelist. 

[Mikhail]

Ok, but I need possibility connect my advertise device to not bonded devices. Is there another method to forbid bonding with HID? May be worth considering peer_manager_init() with bond settings?

[Hung Bui]

You mean, to allow connection but not allowing bonding ? 
If that's the case you would need to call pm_sec_params_set() with p_sec_param = NULL to reject pairing.