Can't send data after re-bonding

[yenchao]

Hi

I'm working on nRF52832 with SDK 15.2.0.

I have a device which is based on ble_app_hrs_rscs_relay.

I added pm_handler_secure_on_connection in ble_evt_handler and set PM_HANDLER_SEC_DELAY_MS to 4000.

static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
{
    uint16_t conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
    uint16_t role        = ble_conn_state_role(conn_handle);

    // Based on the role this device plays in the connection, dispatch to the right handler.
    if (role == BLE_GAP_ROLE_PERIPH || ble_evt_is_advertising_timeout(p_ble_evt))
    {
        pm_handler_secure_on_connection(p_ble_evt);
        ble_hrs_on_ble_evt(p_ble_evt, &m_hrs);
        ble_rscs_on_ble_evt(p_ble_evt, &m_rscs);
        on_ble_peripheral_evt(p_ble_evt);
    }
    else if ((role == BLE_GAP_ROLE_CENTRAL) || (p_ble_evt->header.evt_id == BLE_GAP_EVT_ADV_REPORT))
    {
        ble_hrs_c_on_ble_evt(p_ble_evt, &m_hrs_c);
        ble_rscs_c_on_ble_evt(p_ble_evt, &m_rscs_c);
        on_ble_central_evt(p_ble_evt);
    }
}

I also set hrs_init.hrm_cccd_wr_sec/hrs_init.bsl_rd_sec/rscs_init.rsc_feature_rd_sec/rscs_init.rsc_meas_cccd_wr_sec to SEC_JUST_WORKS.

 

    hrs_init.evt_handler                 = NULL;
    hrs_init.is_sensor_contact_supported = true;
    hrs_init.p_body_sensor_location      = &body_sensor_location;

    // Here the sec level for the Heart Rate Service can be changed or increased.
    hrs_init.hrm_cccd_wr_sec = SEC_JUST_WORKS;//SEC_OPEN;
    hrs_init.bsl_rd_sec      = SEC_JUST_WORKS;//SEC_OPEN;

    err_code = ble_hrs_init(&m_hrs, &hrs_init);
    APP_ERROR_CHECK(err_code);

    // Initialize the Running Speed and Cadence Service.
    memset(&rscs_init, 0, sizeof(rscs_init));

    rscs_init.evt_handler = NULL;
    rscs_init.feature     = BLE_RSCS_FEATURE_INSTANT_STRIDE_LEN_BIT |
                            BLE_RSCS_FEATURE_WALKING_OR_RUNNING_STATUS_BIT;

    // Here the sec level for the Running Speed and Cadence Service can be changed or increased.
    rscs_init.rsc_feature_rd_sec   = SEC_JUST_WORKS;//SEC_OPEN;
    rscs_init.rsc_meas_cccd_wr_sec = SEC_JUST_WORKS;//SEC_OPEN;

The first time I used iphone to connect my device and everything went well.

But, when I erased my device and used iphone to connect again.

Iphone will show pairing request dialog, after I pressed "Pair" option, I can't send or receive any data from my device.

Does anyone know how to fix this issue?

[Marjeris Romero]

Hi,

Have you remember to erase your device from the phones paired device list?

[yenchao]

Hi msromero,

We don't want to erase bonding information on our phone.

We would like to do repairing.

What function should I use after calling pm_handler_secure_on_connection?

Thx

Yen

[yenchao]

Hi msromero,

Any update?

Thx

Yen

[yenchao]

Hi msromero,

Is this an issue or limitation?

Thx

Yen

[yenchao]

Hello,

Anyone can help?

Thx
Yen

[Marjeris Romero]

Hi,

On reconnect, the phone will send an encryption start request to encrypt the link with the existing key (LTK) which wil fail because the bond info was deleted on the peripheral. To make it work again you need to delete the bond info on the phone as well. Go to Settings > Bluetooth and remove you peripheral device form the list of bonded devices.

[yenchao]

Hi msromero,

1.I would like to confirm is "delete the bond info on the phone" the only way to make it work?

2.Why "pm_handler_secure_on_connection" can't make it work?

Thx

Yen

[Marjeris Romero]

Hi,

If you delete bond information on the nRF52832, you need to delete the old bond information in the phone and bond again.

Best regards,

Marjeris