BLE Pairing and binding

Question

use nrf52810 
 nRF5_SDK_15.3.0_59ac345\examples\ble_peripheral\ble_app_uart\pca10040e 
 How to initiate pairing and binding？ 
 Thanks！

Edvin · Accepted Answer

Do you actively delete the bonding information on the phone side? Or does it happen "automatically"? How do you determine that it is deleted? 
 
 It is possible to tell the nRF to accept pairing with already paired devices, so you could do that, but that doesn't change the behavior of the phone. You would then have to pair every time you connect to the mobile phone. 
 Does it happen on other phones as well? Or only that model in particular? 
 
 When an already bonded device asks for a connection without the previous bonding data, the PM_EVT_CONN_SEC_CONFIG_REQ should occur. As you see in the description of this event, it says: 
 /**< @brief The peer (central) has requested pairing, but a bond already exists with that peer. Reply by calling @ref pm_conn_sec_config_reply before the event handler returns. If no reply is sent, a default is used. */ 
 This means that if this event is not handled, the pairing will be denied. What you need to call in this event is pm_conn_sec_config_reply(); with: 
 pm_conn_sec_config_t * p_conn_sec_config, where pm_conn_sec_config.allow_repairing = true; 
 
 But again, this only solves half of your issue. It doesn't explain why the phone deletes the bonding data in the first place. 
 
 Best regards, 
 Edvin

BLE Pairing and binding

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