After Android phone cancel pair, can not connect

RE: After Android phone cancel pair, can not connect

annapalu — Thu, 06 Apr 2017 11:48:22 GMT

Hi Hung,

is there a sort of tutorial that explain how the softedevice memorize the bonding information? I expected that when i delete the bonding information, i delete everthing, also the old bonding device.

And why i have this problem when i have added the withelist, before it i can rapairing with a already bonding device withou problem, also with flag set to false.

thank, Anna

RE: After Android phone cancel pair, can not connect

Chaw — Thu, 02 Mar 2017 13:21:43 GMT

Thanks. It work well.

RE: After Android phone cancel pair, can not connect

Hung Bui — Wed, 01 Mar 2017 11:45:44 GMT

Hi Chaw,

It's most likely because you configured the peer manager to reject re-pairing (default). This is to avoid attacker can spoof a central (copy your phone address) and tell the nRF5 to re-bond therefore delete the genuine bond information.

If you want to allow re-pairing, you need to set allow_repairing = true in PM_EVT_CONN_SEC_CONFIG_REQ event in pm_evt_handler() if you are using the example in the SDK.

RE: After Android phone cancel pair, can not connect

Chaw — Wed, 01 Mar 2017 00:33:15 GMT

I means:

nRF52 power on, adversiting
Android Phone enable BT, scan, find nRF52
Android Phone press nRF52 to connect, then connect successfully
Android Phone remove nRF52 in BT paired devices list (cancel pair)
Android Phone start to scan again, find nRF52
Android Phone press nRF52 to connect, but show (nRF52 refused or can not communication)

Sorry, I can not get sniffer trace, but SDK example ble_app_templated can reproduce, could you test?

RE: After Android phone cancel pair, can not connect

Hung Bui — Tue, 28 Feb 2017 12:50:40 GMT

Hi Chaw,

What do you mean by "cancel pair" ? Was that you clicked pairing and then you canceled it ?

Have you tried to use nRFConnect app to connect and pair ?

Could you record a sniffer trace ?