Confusion with the call of sd_ble_gap_sec_params_reply

[kisvegabor]

Hi,

I'd like to enable paring/bonding for a minute only when a button is pressed. So I need to disable pairing. I've learned that it should be done with

case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
            // Pairing not supported
            err_code = sd_ble_gap_sec_params_reply(m_conn_handle,
                                                   BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP,
                                                   NULL,
                                                   NULL);
            APP_ERROR_CHECK(err_code);
            break;

in "ble_evt_handler". But it returns with "NRF_ERROR_INVALID_STATE". From this topic and from the code I know that it's because "sd_ble_gap_sec_params_reply" is alraedy called in "security_dispatcher.c -> smd_params_reply". 

But then how to refuse to pair if I can't call "sd_ble_gap_sec_params_reply"?

Soft device: s132

SDK: 15.2

Thank you in advance!

[Vidar Berg]

Hi,

You can use the pm_sec_params_set() to change the security parameters on the fly. The peer manager will reject all pairing requests if you pass NULL to this function, and then you don't need to handle the BLE_GAP_EVT_SEC_PARAMS_REQUEST event. 

[kisvegabor]

It works perfectly. Thank you very much!