Please tell me how to achieve re-pairing.

Question

I am developing with nrf52832 (s132 v7.0.1, SDK v17.0.0) as a peripheral device. 
 I would like to have it re-paired when there is no pairing information for either peripheral or central. 
 I found out that this can be done by allowing re-pairing when PM_EVT_CONN_SEC_CONFIG_REQ occurs, so I added that process, but the pairing does not succeed and the device is disconnected. 
 pm_conn_sec_config_t conn_sec_config;

case PM_EVT_CONN_SEC_CONFIG_REQ:
 NRF_LOG_INFO("PM_EVT_CONN_SEC_CONFIG_REQ");
 conn_sec_config.allow_repairing = true;
 pm_conn_sec_config_reply(conn_handle, &conn_sec_config);
 break; 
 The disconnection is done after PM_EVT_CONN_SEC_FAILED. No special processing is done in PM_EVT_CONN_SEC_FAILED. 
 case PM_EVT_CONN_SEC_FAILED:
 if (p_evt.params.conn_sec_failed.error == BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP) {
 NRF_LOG_INFO("No Bonding Infomation for Central.");
 return;
 }
 else if (p_evt.params.conn_sec_failed.error == PM_CONN_SEC_ERROR_PIN_OR_KEY_MISSING) {
 NRF_LOG_INFO("No Bonding Infomation for Peripheral.");
 return;
 }
 
 break; 
 How can we achieve re-pairing?

Joakim Jakobsen · Accepted Answer

Thanks! 
 Before looking at your logs, I tested this in an example myself, to check if I would reproduce the issue. 
 static void pm_evt_handler(pm_evt_t const * p_evt)
{
 pm_handler_on_pm_evt(p_evt);
 pm_handler_disconnect_on_sec_failure(p_evt);
 pm_handler_flash_clean(p_evt);

 pm_conn_sec_config_t conn_sec_config;

 switch (p_evt->evt_id)
 {
 case PM_EVT_PEERS_DELETE_SUCCEEDED:
 advertising_start(false);
 break;
 
 case PM_EVT_CONN_SEC_CONFIG_REQ:
 conn_sec_config.allow_repairing = true;
 pm_conn_sec_config_reply(m_conn_handle, &conn_sec_config);
 break;

 default:
 break;
 }
} 
 Paired the device to my phone. Then I deleted the bond on the central (phone) side, and tried to re-pair. Works as expected. 
 BR, Joakim

Please tell me how to achieve re-pairing.

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