NRF52 - Extract correctly IRK from connected_evt

[Nabil]

Hello,

I'm working with SDK 11 on nRF52832.

I want to get the IRK from a connection event. I need to identify the connected device.

My following code :

static void on_ble_evt(ble_evt_t * p_ble_evt)
{
    uint32_t err_code;

    switch (p_ble_evt->header.evt_id)
            {
        case BLE_GAP_EVT_CONNECTED: {

            err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
            APP_ERROR_CHECK(err_code);
            m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
            app_timer_start(m_debug_timer_id, DEBUG_TIMER_INTERVAL, NULL);
            ble_gap_addr_t  addr;
       

        	  pm_peer_data_flash_t compared_data;
        	  if( im_address_resolve(&p_ble_evt->evt.gap_evt.params.connected.peer_addr,
                                                   &compared_data.p_bonding_data->peer_id.id_info) == true) {
              // match
          	} else  {
        		// no matching 
        	}
        	
            break;
        }

        default:
            // No implementation needed.
            break;
    }
}

When I check : &compared_data.p_bonding_data->peer_id.id_infoI can read an IRK but it's always the same even if I change the smartphone.

I have something like that :

• Addr_type = 2
• Addr = xx:xx:xx:xx:xx:xx
• IRK = xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx

How can I get the correct IRK for the connected device. On a connection_evt I want to extract the IRK and the resolvable adress to manually check if they match.

I' have tried to connect with nRF connect and also bonding.

Thank you in advance.

[Petter Myhre]

No IRK comes with the connection event.

I can't see that you are setting the IRK anywhere, you are just declaring a pm_peer_data_flash_t struct. The IRK in there is probably just random.

If you want to resolve an address with an IRK you first need an IRK. The only way to get the IRK is to bond.