Hello.
My application serve as a central that connect to device by its name. I use the example \ble_central\ble_app_uart_c
On the device side I have password for connecting.
I want to connect only to device that has the require password.
I know on phone I do it by hand and type the password.
But how can I do it in the nRF52840 automatically?
Is there a place to write the require password , and what setting I have to add to the central to use that password when connect?
Thanks
Bar.
Hi,
Take a look at these 2 links,
Central LESC Pairing:
https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.2.0/group___b_l_e___g_a_p___c_e_n_t_r_a_l___l_e_s_c___b_o_n_d_i_n_g___p_k_e___c_d___m_s_c.html
Central Legacy Pairing:
https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.2.0/group___b_l_e___g_a_p___c_e_n_t_r_a_l___b_o_n_d_i_n_g___p_k___p_e_r_i_p_h___o_o_b___m_s_c.html
If you want to support pairing/bonding, you should add the Peer Manager to the ble_app_uart_c example.
Thanks Sigurd.
I get progress and place the events and the request according the link you gave me.
static void _blenus_ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
{
uint32_t err_code;
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_CONNECTED:
NRF_LOG_INFO("Connected");
// signaling connection
for(uint8_t s=0;s<4;s++)
{
nrf_gpio_pin_set(41);// Green LED
nrf_delay_ms(500);
nrf_gpio_pin_clear(41);
}
// err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
// APP_ERROR_CHECK(err_code);
m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, m_conn_handle);
APP_ERROR_CHECK(err_code);
break;
case BLE_GAP_EVT_DISCONNECTED:
NRF_LOG_INFO("Disconnected");
// LED indication will be changed when advertising starts.
_driver_bundle->G.is_connected = 0u;
m_conn_handle = BLE_CONN_HANDLE_INVALID;
// signaling disconnection
for(uint8_t s=0;s<4;s++)
{
nrf_gpio_pin_set(9);// Red LED
nrf_delay_ms(500);
nrf_gpio_pin_clear(9);
}
if(!_driver_bundle->PHY.if_scan)// if not central
{
if(_driver_bundle->G.is_bonded){
// Change advertising mode to whitelist advertising
sd_ble_gap_adv_stop(m_advertising.adv_handle);
_blenus_advertising_init();
ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
}
}
else // if central need to told the PC on disconnect and doesn't connect again automaticly
{
;
}
break;
case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
{
NRF_LOG_DEBUG("PHY update request.");
ble_gap_phys_t const phys =
{
.rx_phys = BLE_GAP_PHY_AUTO,
.tx_phys = BLE_GAP_PHY_AUTO,
};
err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
APP_ERROR_CHECK(err_code);
} break;
case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST:
NRF_LOG_DEBUG("Connection interval request: [%d, %d]",
p_ble_evt->evt.gap_evt.params.conn_param_update_request.conn_params.min_conn_interval,
p_ble_evt->evt.gap_evt.params.conn_param_update_request.conn_params.max_conn_interval);
break;
case BLE_GAP_EVT_CONN_PARAM_UPDATE:
NRF_LOG_DEBUG("Connection interval: [%d, %d]",
p_ble_evt->evt.gap_evt.params.conn_param_update.conn_params.min_conn_interval,
p_ble_evt->evt.gap_evt.params.conn_param_update.conn_params.max_conn_interval);
break;
// case PM_EVT_CONN_SEC_SUCCEEDED:
// // Sent after the connection has been secured,
// NRF_LOG_INFO("Bonded successfully");
// _driver_bundle->G.is_bonded = true;
// pm_whitelist_set(&(p_evt->peer_id), 1);
// pm_sec_params_set(NULL); // Disallow new bonds
// break;
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;
case BLE_GATTS_EVT_SYS_ATTR_MISSING:
// No system attributes have been stored.
// err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
// APP_ERROR_CHECK(err_code);
break;
case BLE_GATTC_EVT_TIMEOUT:
// Disconnect on GATT Client timeout event.
err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
APP_ERROR_CHECK(err_code);
break;
case BLE_GATTS_EVT_TIMEOUT:
// Disconnect on GATT Server timeout event.
err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
APP_ERROR_CHECK(err_code);
break;
case BLE_GAP_EVT_AUTH_KEY_REQUEST:// request to send a keypass which write in teh periph
{
NRF_LOG_INFO("Request password from central");
err_code = sd_ble_gap_auth_key_reply(m_conn_handle,BLE_GAP_AUTH_KEY_TYPE_PASSKEY ,_driver_bundle->PHY.passkey);
}
break;
case BLE_GAP_EVT_CONN_SEC_UPDATE: // when accept the keypass the central send to the periph
{
NRF_LOG_INFO("accept the password from central");
}
break;
case BLE_GAP_EVT_AUTH_STATUS: // seccuss connect to periph with passkey
{
NRF_LOG_INFO("seccuss connect with password");
nrf_gpio_pin_set(12);// Blue LED
nrf_delay_ms(500);
nrf_gpio_pin_clear(12);
}
break;
default:
// No implementation needed.
break;
}
}
I get the connection and after it it just jump to the gatt and set thing there also my peripheral has a keypass enable and request its identical (we use it against phone where it request it there).
Here are the my debug terminal during connection process
[0m[00:00:00.000,000] <debug> ble_scan: Connecting[0m
[0m[00:00:00.000,000] <debug> ble_scan: Connection status: 0[0m
[0m[00:00:00.000,000] <debug> nrf_ble_gatt: Requesting to update ATT MTU to 247 bytes on connection 0x0.[0m
[0m[00:00:00.000,000] <debug> nrf_ble_gatt: Updating data length to 251 on connection 0x0.[0m
[1;32m[00:00:00.000,000] <info> blenus: Connected[0m
[0m[00:00:00.000,000] <debug> nrf_ble_gatt: Peer on connection 0x0 requested an ATT MTU of 247 bytes.[0m
[0m[00:00:00.000,000] <debug> nrf_ble_gatt: Updating ATT MTU to 247 bytes (desired: 247) on connection 0x0.[0m
[0m[00:00:00.000,000] <debug> nrf_ble_gatt: ATT MTU updated to 247 bytes on connection 0x0 (response).[0m
[1;32m[00:00:00.000,000] <info> blenus: Data len is set to 0xF4(244)[0m
[0m[00:00:00.000,000] <debug> blenus: ATT MTU exchange completed. central 0xF7 peripheral 0xF7[0m
[0m[00:00:00.000,000] <debug> nrf_ble_gatt: max_rx_octets: 251[0m
[0m[00:00:00.000,000] <debug> nrf_ble_gatt: max_tx_octets: 251[0m
[0m[00:00:00.000,000] <debug> nrf_ble_gatt: max_rx_time: 2120[0m
It doesn't get to
case BLE_GAP_EVT_AUTH_KEY_REQUEST:
Is there any more setting I need to do at the central init in the peer_manager to let him know it should also wait for passkey change?
Thanks
Bar.
Hi,
Typically you initialize the Peer Manager like shown in the snippet below. Try to set SEC_PARAM_IO_CAPABILITIES to BLE_GAP_IO_CAPS_KEYBOARD_ONLY on the central.
/**@brief Function for the Peer Manager initialization.
*/
static void peer_manager_init(void)
{
ble_gap_sec_params_t sec_param;
ret_code_t err_code;
err_code = pm_init();
APP_ERROR_CHECK(err_code);
memset(&sec_param, 0, sizeof(ble_gap_sec_params_t));
// Security parameters to be used for all security procedures.
sec_param.bond = SEC_PARAM_BOND;
sec_param.mitm = SEC_PARAM_MITM;
sec_param.lesc = SEC_PARAM_LESC;
sec_param.keypress = SEC_PARAM_KEYPRESS;
sec_param.io_caps = SEC_PARAM_IO_CAPABILITIES;
sec_param.oob = SEC_PARAM_OOB;
sec_param.min_key_size = SEC_PARAM_MIN_KEY_SIZE;
sec_param.max_key_size = SEC_PARAM_MAX_KEY_SIZE;
sec_param.kdist_own.enc = 1;
sec_param.kdist_own.id = 1;
sec_param.kdist_peer.enc = 1;
sec_param.kdist_peer.id = 1;
err_code = pm_sec_params_set(&sec_param);
APP_ERROR_CHECK(err_code);
err_code = pm_register(pm_evt_handler);
APP_ERROR_CHECK(err_code);
}
See "Passkey bonding with keyboard capabilities:" at this link: https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/lib_pm_usage.html#lib_pm_usage_security
Hello.
I follow the prievies answer.
I found that compare to the link you specifay before https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s140.api.v7.2.0%2Fgroup___b_l_e___g_a_p___c_e_n_t_r_a_l___b_o_n_d_i_n_g___p_k___p_e_r_i_p_h___o_o_b___m_s_c.html
I need to use event also from the pm handle. For example instead of BLE_GAP_EVT_SEC_PARAMS_REQUEST I see I get event PM_EVT_CONN_SEC_PARAMS_REQso I need to use pm_conn_sec_params_reply.
I also use the pm_peers_delete(); but on run every time it told me it connect to all ready bond unit. After that in get to disconnect by BLE_GAP_EVT_DISCONNECTED:
attach the log (use the Insert->code)
[1;32m[00:00:00.000,000] <info> blenus: Setting BLE scan init filter name is WizmiPixi_18BD22[0m [0m[00:00:00.000,000] <debug> ble_scan: Scanning[0m [1;32m[00:00:00.000,000] <info> blenus: BLE scan start with error 0x0[0m [0m[00:00:00.000,000] <debug> ble_scan: Connecting[0m [0m[00:00:00.000,000] <debug> ble_scan: Connection status: 0[0m [0m[00:00:00.000,000] <debug> nrf_ble_gatt: Requesting to update ATT MTU to 247 bytes on connection 0x0.[0m [0m[00:00:00.000,000] <debug> nrf_ble_gatt: Updating data length to 251 on connection 0x0.[0m [1;32m[00:00:00.000,000] <info> blenus: Connected[0m [0m[00:00:00.000,000] <debug> peer_manager_handler: Connected, securing connection. conn_handle: 0[0m [1;32m[00:00:00.000,000] <info> blenus: Request for secure parameters from central.[0m [1;32m[00:00:00.000,000] <info> blenus: Start secure connection.[0m [1;32m[00:00:00.000,000] <info> blenus: Connected to a previously bonded device.[0m [0m[00:00:00.000,000] <debug> nrf_ble_gatt: Peer on connection 0x0 requested an ATT MTU of 247 bytes.[0m [0m[00:00:00.000,000] <debug> nrf_ble_gatt: ATT MTU updated to 247 bytes on connection 0x0 (response).[0m [1;32m[00:00:00.000,000] <info> blenus: Data len is set to 0xF4(244)[0m [0m[00:00:00.000,000] <debug> blenus: ATT MTU exchange completed. central 0xF7 peripheral 0xF7[0m [1;33m[00:00:00.000,000] <warning> blenus: Failed to secure[0m
So I don't know why after connect it disconnect from the device.
Any hint where to look for?
Bar.
I do some more work around it.
1. I block on the BLE event BLE_GAP_EVT_SEC_PARAMS_REQUEST so it only get replay from PM_EVT_CONN_SEC_PARAMS_REQ with pm_conn_sec_params_reply, because when both was open it get first to the PM event and then to the BLE evt by on relay get err = 0x08
NRF_ERROR_INVALID_STATE.
THen I add those 3 function at start of PM event handler copy from rscs App
pm_handler_on_pm_evt(p_evt);
pm_handler_disconnect_on_sec_failure(p_evt);
pm_handler_flash_clean(p_evt);
So I get also more LOG information and 2 of the PM event handle here.
The next print is the log I get on my run when try to connect to device with the request name (filter by name).
It is look that it get almost till the end by PM_EVT_PEER_DATA_UPDATE_SUCCEEDED event but then from nowhere I get to BLE event BLE_GAP_EVT_DISCONNECTED.
I also write all the BLE unhandled event and I get at the end 2 which not part of the BLE_GAP_EVTS enum
<debug> blenus: Unhandled BLE event 0x35
<debug> blenus: Unhandled BLE event 0x36
It is far away from the list I have around 55 where the enum get only till 38. What events are those?
<debug> nrf_ble_gatt: Requesting to update ATT MTU to 247 bytes on connection 0x0.
<debug> nrf_ble_gatt: Updating data length to 251 on connection 0x0.
<info> blenus: BLE Connected
<debug> peer_manager_handler: Connected, securing connection. conn_handle: 0
<debug> peer_manager_handler: Event PM_EVT_CONN_SEC_PARAMS_REQ
<debug> peer_manager_handler: Security parameter request
<info> blenus: PM Request for secure parameters from central.
<debug> peer_manager_handler: Event PM_EVT_CONN_SEC_START
<debug> nrf_ble_gatt: Peer on connection 0x0 requested an ATT MTU of 247 bytes.
<debug> nrf_ble_gatt: Updating ATT MTU to 247 bytes (desired: 247) on connection 0x0.
<debug> blenus: Unhandled BLE event 0x55
<debug> nrf_ble_gatt: ATT MTU updated to 247 bytes on connection 0x0 (response).
<debug> peer_manager_handler: Event PM_EVT_CONN_SEC_PARAMS_REQ
<debug> peer_manager_handler: Security parameter request
<info> blenus: PM Request for secure parameters from central.
<debug> blenus: Unhandled BLE event 0x13
<info> blenus: BLE Request password from central
<info> blenus: BLE accept the password from central
<debug> peer_manager_handler: Event PM_EVT_CONN_SEC_SUCCEEDED
<info> peer_manager_handler: Connection secured: role: Central, conn_handle: 0, procedure: Bonding
<debug> peer_manager_handler: pm_peer_rank_highest() returned NRF_ERROR_NOT_SUPPORTED for peer id 0
<info> blenus: PM Connection secured: role: Central, conn_handle: 0, procedure: Bonding, Peer ID: 0
<debug> peer_manager_handler: Event PM_EVT_PEER_DATA_UPDATE_SUCCEEDED
<info> peer_manager_handler: Peer data updated in flash: peer_id: 0, data_id: Bonding data, action: Update
<info> blenus: PM New Bond, add the peer to the whitelist if possible
<info> blenus: m_whitelist_peer_cnt 2, MAX_PEERS_WLIST 8
<debug> blenus: Unhandled BLE event 0x35
<debug> blenus: Unhandled BLE event 0x36
<debug> peer_manager_handler: Event PM_EVT_PEER_DATA_UPDATE_SUCCEEDED
<info> peer_manager_handler: Peer data updated in flash: peer_id: 0, data_id: Central address resolution, action: Update