Hi,
I am working on a project where my mobile phone will be acting as a central device and nRF52840 DK will be acting as a peripheral device. I used the nRF UART and nRF toolbox app for basic string transfer from my phone to the nRF board. I was able to display the transmitted and received strings on the mobile app as well as on the desktop using Putty.
I wanted to know how the packets are going over the so I made another nRF52840 board as a sniffer. From the sniffer trace, I got to know that the data are sent and received as plain text. But I wanted to send and receive encrypted data.
When I searched on the internet I got to know that for sending and receiving encrypted data we need to pair and bond the device. So I added the peer manager to my code. Now I am able to send encrypted text from my central device to the peripheral device. The logs are attached below:
<info> app: LE Secure Connections example started. <info> app: Advertising <info> app: PERIPHERAL: Connected, handle 1. <info> app: PERIPHERAL: BLE_GAP_EVT_SEC_PARAMS_REQUEST <info> app: PERIPHERAL: BLE_GAP_EVT_LESC_DHKEY_REQUEST <info> nrf_ble_lesc: Calling sd_ble_gap_lesc_dhkey_reply on conn_handle: 1 <info> app: PERIPHERAL: BLE_GAP_EVT_PASSKEY_DISPLAY: passkey=495856 match_req=1 <info> app: Press Button 1 to confirm, Button 2 to reject <info> app: Numeric Match. Conn handle: 1 <info> peer_manager_handler: Connection secured: role: Peripheral, conn_handle: 1, procedure: Bonding <info> app: PERIPHERAL: BLE_GAP_EVT_AUTH_STATUS: status=0x0 bond=0x1 lv4: 1 kdist_own:0x3 kdist_peer:0x2
The peer manager function is given below:
static void peer_manager_init(void)
{
ble_gap_sec_params_t sec_params;
ret_code_t err_code;
err_code = pm_init();
APP_ERROR_CHECK(err_code);
memset(&sec_params, 0, sizeof(ble_gap_sec_params_t));
// Security parameters to be used for all security procedures.
sec_params.bond = 1;
sec_params.mitm = 1;
sec_params.lesc = 1;
sec_params.keypress = 0;
sec_params.io_caps = BLE_GAP_IO_CAPS_DISPLAY_YESNO;
sec_params.oob = 0;
sec_params.min_key_size = 7;
sec_params.max_key_size = 16;
sec_params.kdist_own.enc = 1;
sec_params.kdist_own.id = 1;
sec_params.kdist_peer.enc = 1;
sec_params.kdist_peer.id = 1;
err_code = pm_sec_params_set(&sec_params);
APP_ERROR_CHECK(err_code);
err_code = pm_register(pm_evt_handler);
APP_ERROR_CHECK(err_code);
}
The complete main.c file is also attached below:
#include "sdk_common.h"
#include "ble_nus.h"
#include "nrf.h"
#include "ble_hci.h"
#include "app_uart.h"
#include "app_util_platform.h"
#include "sdk_config.h"
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "nordic_common.h"
#include "nrf_sdh.h"
#include "nrf_sdh_soc.h"
#include "nrf_sdh_ble.h"
#include "peer_manager.h"
#include "peer_manager_handler.h"
#include "app_timer.h"
#include "bsp_btn_ble.h"
#include "ble.h"
#include "app_util.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
#include "ble_conn_params.h"
#include "ble_db_discovery.h"
#include "ble_hrs.h"
#include "ble_hrs_c.h"
#include "ble_conn_state.h"
#include "fds.h"
#include "nrf_crypto.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_lesc.h"
#include "nrf_ble_qwr.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_ble_scan.h"
#if defined (UART_PRESENT)
#include "nrf_uart.h"
#endif
#if defined (UARTE_PRESENT)
#include "nrf_uarte.h"
#endif
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#define UART_TX_BUF_SIZE 256 /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE 256 /**< UART RX buffer size. */
#define LEDBUTTON_LED BSP_BOARD_LED_2 /**< LED to be toggled with the help of the LED Button Service. */
static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID; /**< Handle of the current connection. */
static uint16_t m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - 3; /**< Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module. */
#define LESC_DEBUG_MODE 0 /**< Set to 1 to use the LESC debug keys. The debug mode allows you to use a sniffer to inspect traffic. */
#define LESC_MITM_NC 1 /**< Use MITM (Numeric Comparison). */
/** @brief The maximum number of peripheral and central links combined. */
#define NRF_BLE_LINK_COUNT (NRF_SDH_BLE_PERIPHERAL_LINK_COUNT + NRF_SDH_BLE_CENTRAL_LINK_COUNT)
#define APP_BLE_CONN_CFG_TAG 1 /**< Tag that identifies the SoftDevice BLE configuration. */
#define DEVICE_NAME "CONNECT" /**< Name of device. Will be included in the advertising data. */
#define NUS_SERVICE_UUID_TYPE BLE_UUID_TYPE_VENDOR_BEGIN /**< UUID type for the Nordic UART Service (vendor specific). */
//#define CENTRAL_SCANNING_LED BSP_BOARD_LED_0
//#define CENTRAL_CONNECTED_LED BSP_BOARD_LED_1
#define PERIPHERAL_ADVERTISING_LED BSP_BOARD_LED_0
#define PERIPHERAL_CONNECTED_LED BSP_BOARD_LED_1
#define SCAN_DURATION 0x0000 /**< Duration of the scanning in units of 10 milliseconds. If set to 0x0000, scanning continues until it is explicitly disabled. */
#define APP_ADV_INTERVAL 300 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */
#define APP_ADV_DURATION 18000 /**< The advertising duration (180 seconds) in units of 10 milliseconds. */
#define MIN_CONN_INTERVAL MSEC_TO_UNITS(20, UNIT_1_25_MS) /**< Minimum acceptable connection interval (20 ms), Connection interval uses 1.25 ms units. */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(75, UNIT_1_25_MS) /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */
#define SLAVE_LATENCY 0 /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
#define SEC_PARAMS_BOND 1 /**< Perform bonding. */
#if LESC_MITM_NC
#define SEC_PARAMS_MITM 1 /**< Man In The Middle protection required. */
#define SEC_PARAMS_IO_CAPABILITIES BLE_GAP_IO_CAPS_DISPLAY_YESNO /**< Display Yes/No to force Numeric Comparison. */
#else
#define SEC_PARAMS_MITM 0 /**< Man In The Middle protection required. */
#define SEC_PARAMS_IO_CAPABILITIES BLE_GAP_IO_CAPS_NONE /**< No I/O caps. */
#endif
#define SEC_PARAMS_LESC 1 /**< LE Secure Connections pairing required. */
#define SEC_PARAMS_KEYPRESS 0 /**< Keypress notifications not required. */
#define SEC_PARAMS_OOB 0 /**< Out Of Band data not available. */
#define SEC_PARAMS_MIN_KEY_SIZE 7 /**< Minimum encryption key size in octets. */
#define SEC_PARAMS_MAX_KEY_SIZE 16 /**< Maximum encryption key size in octets. */
#define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(15000) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
#define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
#define MAX_CONN_PARAMS_UPDATE_COUNT 3 /**< Number of attempts before giving up the connection parameter negotiation. */
/**@brief Priority of the application BLE event handler.
* @note There is no need to modify this value.
*/
#define APP_BLE_OBSERVER_PRIO 3
typedef struct
{
bool is_connected;
ble_gap_addr_t address;
} conn_peer_t;
BLE_NUS_DEF(m_nus, NRF_SDH_BLE_TOTAL_LINK_COUNT);
//BLE_LBS_DEF(m_lbs);
//BLE_HRS_DEF(m_hrs); /**< Heart Rate Service instance. */
//BLE_HRS_C_DEF(m_hrs_c); /**< Structure used to identify the Heart Rate client module. */
NRF_BLE_GATT_DEF(m_gatt); /**< GATT module instance. */
NRF_BLE_QWRS_DEF(m_qwr, NRF_SDH_BLE_TOTAL_LINK_COUNT); /**< Context for the Queued Write module.*/
BLE_ADVERTISING_DEF(m_advertising); /**< Advertising module instance. */
//BLE_DB_DISCOVERY_DEF(m_db_disc); /**< Database discovery module instance. */
NRF_BLE_SCAN_DEF(m_scan); /**< Scanning Module instance. */
//static uint16_t m_conn_handle_hrs_c = BLE_CONN_HANDLE_INVALID; /**< Connection handle for the HRS central application. */
//static volatile uint16_t m_conn_handle_num_comp_central = BLE_CONN_HANDLE_INVALID; /**< Connection handle for the central that needs a numeric comparison button press. */
static volatile uint16_t m_conn_handle_num_comp_peripheral = BLE_CONN_HANDLE_INVALID; /**< Connection handle for the peripheral that needs a numeric comparison button press. */
static conn_peer_t m_connected_peers[NRF_BLE_LINK_COUNT]; /**< Array of connected peers. */
static char * roles_str[] =
{
"INVALID_ROLE",
"PERIPHERAL",
//"CENTRAL",
};
/**@brief Names that the central application scans for, and that are advertised by the peripherals.
* If these are set to empty strings, the UUIDs defined below are used.
*/
//static const char m_target_periph_name[] = "";
/**@brief UUIDs that the central application scans for if the name above is set to an empty string,
* and that are to be advertised by the peripherals.
*/
static ble_uuid_t m_adv_uuids[] = {//{BLE_UUID_HEART_RATE_SERVICE, BLE_UUID_TYPE_BLE},
//{BLE_UUID_RUNNING_SPEED_AND_CADENCE, BLE_UUID_TYPE_BLE}
{BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}};
/**@brief Function for handling asserts in the SoftDevice
*
* @details This function is called in case of an assert in the SoftDevice.
*
* @warning This handler is an example only and is not meant for the final product. You need to analyze
* how your product is supposed to react in case of assert.
* @warning On assert from the SoftDevice, the system can only recover on reset.
*
* @param[in] line_num Line number of the failing assert call.
* @param[in] p_file_name File name of the failing assert call.
*/
void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
{
app_error_handler(0xDEADBEEF, line_num, p_file_name);
}
/**@brief Function for handling an event from the Connection Parameters Module.
*
* @details This function will be called for all events in the Connection Parameters Module
* which are passed to the application.
*
* @note All this function does is to disconnect. This could have been done by simply setting
* the disconnect_on_fail config parameter, but instead we use the event handler
* mechanism to demonstrate its use.
*
* @param[in] p_evt Event received from the Connection Parameters Module.
*/
static void on_conn_params_evt(ble_conn_params_evt_t * p_evt)
{
uint32_t err_code;
if (p_evt->evt_type == BLE_CONN_PARAMS_EVT_FAILED)
{
err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_CONN_INTERVAL_UNACCEPTABLE);
APP_ERROR_CHECK(err_code);
}
}
/**@brief Function for handling errors from the Connection Parameters module.
*
* @param[in] nrf_error Error code that contains information about what went wrong.
*/
static void conn_params_error_handler(uint32_t nrf_error)
{
APP_ERROR_HANDLER(nrf_error);
}
/**@brief Function for handling Scanning Module events.
static void scan_evt_handler(scan_evt_t const * p_scan_evt)
{
ret_code_t err_code;
switch(p_scan_evt->scan_evt_id)
{
case NRF_BLE_SCAN_EVT_CONNECTING_ERROR:
{
err_code = p_scan_evt->params.connecting_err.err_code;
APP_ERROR_CHECK(err_code);
} break;
default:
break;
}
}
/**@brief Function for initializing the scanning and setting the filters.
static void scan_init(void)
{
ret_code_t err_code;
ble_uuid_t target_uuid =
{
.uuid = BLE_UUID_HEART_RATE_SERVICE,
.type = BLE_UUID_TYPE_BLE
};
nrf_ble_scan_init_t init_scan;
memset(&init_scan, 0, sizeof(init_scan));
init_scan.connect_if_match = true;
init_scan.conn_cfg_tag = APP_BLE_CONN_CFG_TAG;
err_code = nrf_ble_scan_init(&m_scan, &init_scan, scan_evt_handler);
APP_ERROR_CHECK(err_code);
if (strlen(m_target_periph_name) != 0)
{
err_code = nrf_ble_scan_filter_set(&m_scan,
SCAN_NAME_FILTER,
m_target_periph_name);
APP_ERROR_CHECK(err_code);
}
err_code = nrf_ble_scan_filter_set(&m_scan,
SCAN_UUID_FILTER,
&target_uuid);
APP_ERROR_CHECK(err_code);
err_code = nrf_ble_scan_filters_enable(&m_scan,
NRF_BLE_SCAN_NAME_FILTER | NRF_BLE_SCAN_UUID_FILTER,
false);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for initializing the scanning.
static void scan_start(void)
{
ret_code_t err_code;
err_code = nrf_ble_scan_start(&m_scan);
APP_ERROR_CHECK(err_code);
NRF_LOG_INFO("Scanning");
}
/**@brief Function for initializing the advertising and the scanning.
*/
static void adv_scan_start(void)
{
ret_code_t err_code;
//scan_start();
// Turn on the LED to signal scanning.
// bsp_board_led_on(CENTRAL_SCANNING_LED);
// Start advertising.
err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
APP_ERROR_CHECK(err_code);
NRF_LOG_INFO("Advertising");
}
/**@brief Function for handling Peer Manager events.
*
* @param[in] p_evt Peer Manager event.
*/
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);
switch (p_evt->evt_id)
{
case PM_EVT_PEERS_DELETE_SUCCEEDED:
adv_scan_start();
break;
default:
break;
}
}
/**@brief Function for changing filter settings after establishing the connection.
static void filter_settings_change(void)
{
ret_code_t err_code;
err_code = nrf_ble_scan_all_filter_remove(&m_scan);
APP_ERROR_CHECK(err_code);
if (strlen(m_target_periph_name) != 0)
{
err_code = nrf_ble_scan_filter_set(&m_scan,
SCAN_NAME_FILTER,
m_target_periph_name);
APP_ERROR_CHECK(err_code);
}
}
/**@brief Handles events coming from the Heart Rate central module.
static void hrs_c_evt_handler(ble_hrs_c_t * p_hrs_c, ble_hrs_c_evt_t * p_hrs_c_evt)
{
switch (p_hrs_c_evt->evt_type)
{
case BLE_HRS_C_EVT_DISCOVERY_COMPLETE:
{
if (m_conn_handle_hrs_c == BLE_CONN_HANDLE_INVALID)
{
ret_code_t err_code;
m_conn_handle_hrs_c = p_hrs_c_evt->conn_handle;
// We do not want to connect to two peripherals offering the same service, so when
// a UUID is matched, we check whether we are not already connected to a peer which
// offers the same service
filter_settings_change();
NRF_LOG_INFO("CENTRAL: HRS discovered on conn_handle 0x%x",
m_conn_handle_hrs_c);
err_code = ble_hrs_c_handles_assign(p_hrs_c,
m_conn_handle_hrs_c,
&p_hrs_c_evt->params.peer_db);
APP_ERROR_CHECK(err_code);
// Heart rate service discovered. Enable notification of Heart Rate Measurement.
err_code = ble_hrs_c_hrm_notif_enable(p_hrs_c);
APP_ERROR_CHECK(err_code);
}
} break; // BLE_HRS_C_EVT_DISCOVERY_COMPLETE
case BLE_HRS_C_EVT_HRM_NOTIFICATION:
{
NRF_LOG_INFO("CENTRAL: Heart Rate = %d", p_hrs_c_evt->params.hrm.hr_value);
} break;
default:
// No implementation needed.
break;
}
}
/**@brief Function for checking whether a link already exists with a newly connected peer.
*
* @details This function checks whether the newly connected device is already connected.
*
* @param[in] p_connected_evt Bluetooth connected event.
* @return True if the peer's address is found in the list of connected peers,
* false otherwise.
*/
static bool is_already_connected(ble_gap_addr_t const * p_connected_adr)
{
for (uint32_t i = 0; i < NRF_BLE_LINK_COUNT; i++)
{
if (m_connected_peers[i].is_connected)
{
if (m_connected_peers[i].address.addr_type == p_connected_adr->addr_type)
{
if (memcmp(m_connected_peers[i].address.addr,
p_connected_adr->addr,
sizeof(m_connected_peers[i].address.addr)) == 0)
{
return true;
}
}
}
}
return false;
}
/** @brief Function for handling a numeric comparison match request. */
static void on_match_request(uint16_t conn_handle, uint8_t role)
{
// Mark the appropriate conn_handle as pending. The rest is handled on button press.
NRF_LOG_INFO("Press Button 1 to confirm, Button 2 to reject");
if (role == BLE_GAP_ROLE_CENTRAL)
{
//m_conn_handle_num_comp_central = conn_handle;
}
else if (role == BLE_GAP_ROLE_PERIPH)
{
m_conn_handle_num_comp_peripheral = conn_handle;
}
}
/**@brief Function for assigning new connection handle to the available instance of QWR module.
*
* @param[in] conn_handle New connection handle.
*/
static void multi_qwr_conn_handle_assign(uint16_t conn_handle)
{
for (uint32_t i = 0; i < NRF_BLE_LINK_COUNT; i++)
{
if (m_qwr[i].conn_handle == BLE_CONN_HANDLE_INVALID)
{
ret_code_t err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr[i], conn_handle);
APP_ERROR_CHECK(err_code);
break;
}
}
}
/**@brief Function for handling BLE Stack events that are common to both the central and peripheral roles.
* @param[in] conn_handle Connection Handle.
* @param[in] p_ble_evt Bluetooth stack event.
*/
static void on_ble_evt(uint16_t conn_handle, ble_evt_t const * p_ble_evt)
{
char passkey[BLE_GAP_PASSKEY_LEN + 1];
uint16_t role = ble_conn_state_role(conn_handle);
pm_handler_secure_on_connection(p_ble_evt);
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_CONNECTED:
m_connected_peers[conn_handle].is_connected = true;
m_connected_peers[conn_handle].address = p_ble_evt->evt.gap_evt.params.connected.peer_addr;
multi_qwr_conn_handle_assign(conn_handle);
break;
case BLE_GAP_EVT_DISCONNECTED:
memset(&m_connected_peers[conn_handle], 0x00, sizeof(m_connected_peers[0]));
break;
case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
NRF_LOG_INFO("%s: BLE_GAP_EVT_SEC_PARAMS_REQUEST", nrf_log_push(roles_str[role]));
break;
case BLE_GAP_EVT_PASSKEY_DISPLAY:
memcpy(passkey, p_ble_evt->evt.gap_evt.params.passkey_display.passkey, BLE_GAP_PASSKEY_LEN);
passkey[BLE_GAP_PASSKEY_LEN] = 0x00;
NRF_LOG_INFO("%s: BLE_GAP_EVT_PASSKEY_DISPLAY: passkey=%s match_req=%d",
nrf_log_push(roles_str[role]),
nrf_log_push(passkey),
p_ble_evt->evt.gap_evt.params.passkey_display.match_request);
if (p_ble_evt->evt.gap_evt.params.passkey_display.match_request)
{
on_match_request(conn_handle, role);
}
break;
case BLE_GAP_EVT_AUTH_KEY_REQUEST:
NRF_LOG_INFO("%s: BLE_GAP_EVT_AUTH_KEY_REQUEST", nrf_log_push(roles_str[role]));
break;
case BLE_GAP_EVT_LESC_DHKEY_REQUEST:
NRF_LOG_INFO("%s: BLE_GAP_EVT_LESC_DHKEY_REQUEST", nrf_log_push(roles_str[role]));
break;
case BLE_GAP_EVT_AUTH_STATUS:
NRF_LOG_INFO("%s: BLE_GAP_EVT_AUTH_STATUS: status=0x%x bond=0x%x lv4: %d kdist_own:0x%x kdist_peer:0x%x",
nrf_log_push(roles_str[role]),
p_ble_evt->evt.gap_evt.params.auth_status.auth_status,
p_ble_evt->evt.gap_evt.params.auth_status.bonded,
p_ble_evt->evt.gap_evt.params.auth_status.sm1_levels.lv4,
*((uint8_t *)&p_ble_evt->evt.gap_evt.params.auth_status.kdist_own),
*((uint8_t *)&p_ble_evt->evt.gap_evt.params.auth_status.kdist_peer));
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,
};
ret_code_t err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
APP_ERROR_CHECK(err_code);
} break;
default:
// No implementation needed.
break;
}
}
/**@brief Function for handling BLE Stack events that are related to central application.
*
* @details This function keeps the connection handles of central application up-to-date. It
* parses scanning reports, initiates a connection attempt to peripherals when a target UUID
* is found, and manages connection parameter update requests. Additionally, it updates the status
* of LEDs used to report the central application's activity.
*
* @note Since this function updates connection handles, @ref BLE_GAP_EVT_DISCONNECTED events
* must be dispatched to the target application before invoking this function.
*
* @param[in] p_ble_evt Bluetooth stack event.
static void on_ble_central_evt(ble_evt_t const * p_ble_evt)
{
ble_gap_evt_t const * p_gap_evt = &p_ble_evt->evt.gap_evt;
ret_code_t err_code;
switch (p_ble_evt->header.evt_id)
{
// Upon connection, check which peripheral is connected (HR or RSC), initiate DB
// discovery, update LEDs status, and resume scanning, if necessary.
case BLE_GAP_EVT_CONNECTED:
{
NRF_LOG_INFO("CENTRAL: Connected, handle: %d.", p_gap_evt->conn_handle);
// If no Heart Rate Sensor is currently connected, try to find them on this peripheral.
if (m_conn_handle_hrs_c == BLE_CONN_HANDLE_INVALID)
{
NRF_LOG_INFO("CENTRAL: Searching for HRS on conn_handle 0x%x", p_gap_evt->conn_handle);
err_code = ble_db_discovery_start(&m_db_disc, p_gap_evt->conn_handle);
APP_ERROR_CHECK(err_code);
}
// Update status of LEDs.
bsp_board_led_off(CENTRAL_SCANNING_LED);
bsp_board_led_on(CENTRAL_CONNECTED_LED);
} break; // BLE_GAP_EVT_CONNECTED
// Upon disconnection, reset the connection handle of the peer that disconnected, update
// the status of LEDs, and start scanning again.
case BLE_GAP_EVT_DISCONNECTED:
{
NRF_LOG_INFO("CENTRAL: Disconnected, handle: %d, reason: 0x%x",
p_gap_evt->conn_handle,
p_gap_evt->params.disconnected.reason);
// Update the status of LEDs.
bsp_board_led_off(CENTRAL_CONNECTED_LED);
bsp_board_led_on(CENTRAL_SCANNING_LED);
if (p_gap_evt->conn_handle == m_conn_handle_hrs_c)
{
ble_uuid_t target_uuid = {.uuid = BLE_UUID_HEART_RATE_SERVICE, .type = BLE_UUID_TYPE_BLE};
m_conn_handle_hrs_c = BLE_CONN_HANDLE_INVALID;
err_code = nrf_ble_scan_filter_set(&m_scan,
SCAN_UUID_FILTER,
&target_uuid);
APP_ERROR_CHECK(err_code);
}
scan_start();
} break; // BLE_GAP_EVT_DISCONNECTED
case BLE_GAP_EVT_TIMEOUT:
{
// Timeout for scanning is not specified, so only connection attemps can time out.
if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN)
{
NRF_LOG_DEBUG("CENTRAL: Connection Request timed out.");
}
} break;
case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST:
{
// Accept parameters requested by peer.
err_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle,
&p_gap_evt->params.conn_param_update_request.conn_params);
APP_ERROR_CHECK(err_code);
} break;
case BLE_GATTC_EVT_TIMEOUT:
// Disconnect on GATT Client timeout event.
NRF_LOG_DEBUG("CENTRAL: GATT Client Timeout.");
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.
NRF_LOG_DEBUG("CENTRAL: GATT Server Timeout.");
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;
default:
// No implementation needed.
break;
}
}
/**@brief Function for handling BLE Stack events that involves peripheral applications. Manages the
* LEDs used to report the status of the peripheral applications.
*
* @param[in] p_ble_evt Bluetooth stack event.
*/
static void on_ble_peripheral_evt(ble_evt_t const * p_ble_evt)
{
ret_code_t err_code;
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_CONNECTED:
NRF_LOG_INFO("PERIPHERAL: Connected, handle %d.", p_ble_evt->evt.gap_evt.conn_handle);
bsp_board_led_off(PERIPHERAL_ADVERTISING_LED);
bsp_board_led_on(PERIPHERAL_CONNECTED_LED);
break;
case BLE_GAP_EVT_DISCONNECTED:
NRF_LOG_INFO("PERIPHERAL: Disconnected, handle %d, reason 0x%x.",
p_ble_evt->evt.gap_evt.conn_handle,
p_ble_evt->evt.gap_evt.params.disconnected.reason);
// LED indication will be changed when advertising starts.
break;
case BLE_GATTC_EVT_TIMEOUT:
// Disconnect on GATT Client timeout event.
NRF_LOG_DEBUG("PERIPHERAL: GATT Client Timeout.");
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.
NRF_LOG_DEBUG("PERIPHERAL: GATT Server Timeout.");
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;
default:
// No implementation needed.
break;
}
}
/**@brief Function for handling advertising events.
*
* @param[in] ble_adv_evt Advertising event.
*/
static void on_adv_evt(ble_adv_evt_t ble_adv_evt)
{
switch (ble_adv_evt)
{
case BLE_ADV_EVT_FAST:
bsp_board_led_on(PERIPHERAL_ADVERTISING_LED);
bsp_board_led_off(PERIPHERAL_CONNECTED_LED);
break;
case BLE_ADV_EVT_IDLE:
{
ret_code_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
APP_ERROR_CHECK(err_code);
} break;
default:
// No implementation needed.
break;
}
}
/**@brief Function for handling BLE events.
*
* @param[in] p_ble_evt Bluetooth stack event.
* @param[in] p_context Unused.
static void 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");
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.
m_conn_handle = BLE_CONN_HANDLE_INVALID;
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_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;
default:
// No implementation needed.
break;
}
}
/**@brief Function for handling BLE events.
*
* @param[in] p_ble_evt Bluetooth stack event.
* @param[in] p_context Unused.
*/
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);
if ( (p_ble_evt->header.evt_id == BLE_GAP_EVT_CONNECTED)
&& (is_already_connected(&p_ble_evt->evt.gap_evt.params.connected.peer_addr)))
{
NRF_LOG_INFO("%s: Already connected to this device as %s (handle: %d), disconnecting.",
(role == BLE_GAP_ROLE_PERIPH) ? "PERIPHERAL" : "CENTRAL",
(role == BLE_GAP_ROLE_PERIPH) ? "CENTRAL" : "PERIPHERAL",
conn_handle);
(void)sd_ble_gap_disconnect(conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
// Do not process the event further.
return;
}
on_ble_evt(conn_handle, p_ble_evt);
if (role == BLE_GAP_ROLE_PERIPH)
{
// Manages peripheral LEDs.
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))
{
on_ble_central_evt(p_ble_evt);
}
*/
}
/**@brief Function for initializing the Heart Rate Service client.
static void hrs_c_init(void)
{
ret_code_t err_code;
ble_hrs_c_init_t hrs_c_init_obj;
hrs_c_init_obj.evt_handler = hrs_c_evt_handler;
err_code = ble_hrs_c_init(&m_hrs_c, &hrs_c_init_obj);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for initializing the BLE stack.
*
* @details Initializes the SoftDevice and the BLE event interrupts.
*/
static void ble_stack_init(void)
{
ret_code_t err_code;
err_code = nrf_sdh_enable_request();
APP_ERROR_CHECK(err_code);
// Configure the BLE stack by using the default settings.
// Fetch the start address of the application RAM.
uint32_t ram_start = 0;
err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
APP_ERROR_CHECK(err_code);
// Enable BLE stack.
err_code = nrf_sdh_ble_enable(&ram_start);
APP_ERROR_CHECK(err_code);
// Register a handler for BLE events.
NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
}
/**@brief Function for initializing the Peer Manager. */
static void peer_manager_init(void)
{
ble_gap_sec_params_t sec_params;
ret_code_t err_code;
err_code = pm_init();
APP_ERROR_CHECK(err_code);
memset(&sec_params, 0, sizeof(ble_gap_sec_params_t));
// Security parameters to be used for all security procedures.
sec_params.bond = SEC_PARAMS_BOND;
sec_params.mitm = SEC_PARAMS_MITM;
sec_params.lesc = SEC_PARAMS_LESC;
sec_params.keypress = SEC_PARAMS_KEYPRESS;
sec_params.io_caps = SEC_PARAMS_IO_CAPABILITIES;
sec_params.oob = SEC_PARAMS_OOB;
sec_params.min_key_size = SEC_PARAMS_MIN_KEY_SIZE;
sec_params.max_key_size = SEC_PARAMS_MAX_KEY_SIZE;
sec_params.kdist_own.enc = 1;
sec_params.kdist_own.id = 1;
sec_params.kdist_peer.enc = 1;
sec_params.kdist_peer.id = 1;
err_code = pm_sec_params_set(&sec_params);
APP_ERROR_CHECK(err_code);
err_code = pm_register(pm_evt_handler);
APP_ERROR_CHECK(err_code);
}
/** @brief Delete all data stored for all peers. */
static void delete_bonds(void)
{
ret_code_t err_code;
NRF_LOG_INFO("Erase bonds!");
err_code = pm_peers_delete();
APP_ERROR_CHECK(err_code);
}
/** @brief Function for accepting or rejecting a numeric comparison. */
static void num_comp_reply(uint16_t conn_handle, bool accept)
{
uint8_t key_type;
ret_code_t err_code;
if (accept)
{
NRF_LOG_INFO("Numeric Match. Conn handle: %d", conn_handle);
key_type = BLE_GAP_AUTH_KEY_TYPE_PASSKEY;
}
else
{
NRF_LOG_INFO("Numeric REJECT. Conn handle: %d", conn_handle);
key_type = BLE_GAP_AUTH_KEY_TYPE_NONE;
}
err_code = sd_ble_gap_auth_key_reply(conn_handle,
key_type,
NULL);
APP_ERROR_CHECK(err_code);
}
/** @brief Function for handling button presses for numeric comparison match requests. */
static void on_num_comp_button_press(bool accept)
{
// Check whether any links have pending match requests, and if so, send a reply.
/*if (m_conn_handle_num_comp_central != BLE_CONN_HANDLE_INVALID)
{
num_comp_reply(m_conn_handle_num_comp_central, accept);
m_conn_handle_num_comp_central = BLE_CONN_HANDLE_INVALID;
}
else*/ if (m_conn_handle_num_comp_peripheral != BLE_CONN_HANDLE_INVALID)
{
num_comp_reply(m_conn_handle_num_comp_peripheral, accept);
m_conn_handle_num_comp_peripheral = BLE_CONN_HANDLE_INVALID;
}
}
/**@brief Function for handling events from the BSP module.
*
* @param[in] event Event generated by button press.
*/
static void bsp_event_handler(bsp_event_t event)
{
ret_code_t err_code;
switch (event)
{
case BSP_EVENT_KEY_0:
/*err_code = ble_hrs_heart_rate_measurement_send(&m_hrs, 87);
if ((err_code != NRF_SUCCESS) &&
(err_code != NRF_ERROR_INVALID_STATE) &&
(err_code != NRF_ERROR_RESOURCES) &&
(err_code != NRF_ERROR_BUSY) &&
(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
)
{
APP_ERROR_HANDLER(err_code);
}*/
on_num_comp_button_press(true);
break;
case BSP_EVENT_KEY_1:
on_num_comp_button_press(false);
break;
case BSP_EVENT_DISCONNECT:
err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
if (err_code != NRF_ERROR_INVALID_STATE)
{
APP_ERROR_CHECK(err_code);
}
break;
case BSP_EVENT_WHITELIST_OFF:
if (m_conn_handle == BLE_CONN_HANDLE_INVALID)
{
err_code = ble_advertising_restart_without_whitelist(&m_advertising);
if (err_code != NRF_ERROR_INVALID_STATE)
{
APP_ERROR_CHECK(err_code);
}
}
break;
default:
break;
}
}
/**@brief Function for initializing buttons and LEDs.
*
* @param[out] p_erase_bonds True if the clear bonding button is pressed to
* wake the application up. False otherwise.
*/
static void buttons_leds_init(bool * p_erase_bonds)
{
ret_code_t err_code;
bsp_event_t startup_event;
err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
APP_ERROR_CHECK(err_code);
err_code = bsp_btn_ble_init(NULL, &startup_event);
APP_ERROR_CHECK(err_code);
*p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
}
/**@brief Function for initializing the GAP.
*
* @details This function sets up all the necessary GAP (Generic Access Profile) parameters of the
* device, including the device name, appearance, and the preferred connection parameters.
*/
static void gap_params_init(void)
{
ret_code_t err_code;
ble_gap_conn_params_t gap_conn_params;
ble_gap_conn_sec_mode_t sec_mode;
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
err_code = sd_ble_gap_device_name_set(&sec_mode,
(const uint8_t *)DEVICE_NAME,
strlen(DEVICE_NAME));
APP_ERROR_CHECK(err_code);
memset(&gap_conn_params, 0, sizeof(gap_conn_params));
gap_conn_params = m_scan.conn_params;
gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
gap_conn_params.slave_latency = SLAVE_LATENCY;
gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;
err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for handling events from the GATT library. */
void gatt_evt_handler(nrf_ble_gatt_t * p_gatt, nrf_ble_gatt_evt_t const * p_evt)
{
if ((m_conn_handle == p_evt->conn_handle) && (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED))
{
m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;
NRF_LOG_INFO("Data len is set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len);
}
NRF_LOG_DEBUG("ATT MTU exchange completed. central 0x%x peripheral 0x%x",
p_gatt->att_mtu_desired_central,
p_gatt->att_mtu_desired_periph);
}
/**@brief Function for initializing the GATT library. */
void gatt_init(void)
{
ret_code_t err_code;
err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler);
APP_ERROR_CHECK(err_code);
err_code = nrf_ble_gatt_att_mtu_periph_set(&m_gatt, NRF_SDH_BLE_GATT_MAX_MTU_SIZE);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for handling Queued Write Module errors.
*
* @details A pointer to this function is passed to each service that may need to inform the
* application about an error.
*
* @param[in] nrf_error Error code containing information about what went wrong.
*/
static void nrf_qwr_error_handler(uint32_t nrf_error)
{
APP_ERROR_HANDLER(nrf_error);
}
/**@brief Function for initializing the Queued Write instances.
*/
static void qwr_init(void)
{
ret_code_t err_code;
nrf_ble_qwr_init_t qwr_init_obj = {0};
qwr_init_obj.error_handler = nrf_qwr_error_handler;
for (uint32_t i = 0; i < NRF_BLE_LINK_COUNT; i++)
{
err_code = nrf_ble_qwr_init(&m_qwr[i], &qwr_init_obj);
APP_ERROR_CHECK(err_code);
}
}
/**@brief Function for initializing the Connection Parameters module. */
static void conn_params_init(void)
{
ret_code_t err_code;
ble_conn_params_init_t cp_init;
memset(&cp_init, 0, sizeof(cp_init));
cp_init.p_conn_params = NULL;
cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY;
cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT;
cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID; // Start upon connection.
cp_init.disconnect_on_fail = false;//true
cp_init.evt_handler = on_conn_params_evt;//NULL; // Ignore events.
cp_init.error_handler = conn_params_error_handler;
err_code = ble_conn_params_init(&cp_init);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for handling database discovery events.
*
* @details This function is a callback function to handle events from the database discovery module.
* Depending on the UUIDs that are discovered, this function forwards the events
* to their respective services.
*
* @param[in] p_event Pointer to the database discovery event.
static void db_disc_handler(ble_db_discovery_evt_t * p_evt)
{
ble_hrs_on_db_disc_evt(&m_hrs_c, p_evt);
}
/**@brief Function for initializing the database discovery module.
static void db_discovery_init(void)
{
ret_code_t err_code = ble_db_discovery_init(db_disc_handler);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for initializing the Heart Rate service.
static void hrs_init(void)
{
ret_code_t err_code;
ble_hrs_init_t hrs_init_params;
uint8_t body_sensor_location;
// Initialize the Heart Rate Service.
body_sensor_location = BLE_HRS_BODY_SENSOR_LOCATION_FINGER;
memset(&hrs_init_params, 0, sizeof(hrs_init_params));
hrs_init_params.evt_handler = NULL;
hrs_init_params.is_sensor_contact_supported = true;
hrs_init_params.p_body_sensor_location = &body_sensor_location;
// Require LESC with MITM (Numeric Comparison).
hrs_init_params.hrm_cccd_wr_sec = SEC_MITM;
hrs_init_params.bsl_rd_sec = SEC_MITM;
err_code = ble_hrs_init(&m_hrs, &hrs_init_params);
APP_ERROR_CHECK(err_code);
}
/**@snippet [Handling the data received over BLE] */
/**@brief Function for handling the data from the Nordic UART Service.
*
* @details This function will process the data received from the Nordic UART BLE Service and send
* it to the UART module.
*
* @param[in] p_evt Nordic UART Service event.
*/
/**@snippet [Handling the data received over BLE] */
static void nus_data_handler(ble_nus_evt_t * p_evt)
{
if (p_evt->type == BLE_NUS_EVT_RX_DATA)
{
uint32_t err_code;
NRF_LOG_DEBUG("Received data from BLE NUS. Writing data on UART.");
NRF_LOG_HEXDUMP_DEBUG(p_evt->params.rx_data.p_data, p_evt->params.rx_data.length);
for (uint32_t i = 0; i < p_evt->params.rx_data.length; i++)
{
do
{
err_code = app_uart_put(p_evt->params.rx_data.p_data[i]);
if ((err_code != NRF_SUCCESS) && (err_code != NRF_ERROR_BUSY))
{
NRF_LOG_ERROR("Failed receiving NUS message. Error 0x%x. ", err_code);
APP_ERROR_CHECK(err_code);
}
} while (err_code == NRF_ERROR_BUSY);
}
if (p_evt->params.rx_data.p_data[p_evt->params.rx_data.length - 1] == '\r')
{
while (app_uart_put('\n') == NRF_ERROR_BUSY);
}
}
}
/**@snippet [Handling the data received over BLE] */
/**@brief Function for initializing services that will be used by the application.
*/
static void services_init(void)
{
uint32_t err_code;
ble_nus_init_t nus_init;
//ble_lbs_init_t init = {0};
// Initialize NUS.
memset(&nus_init, 0, sizeof(nus_init));
nus_init.data_handler = nus_data_handler;
err_code = ble_nus_init(&m_nus, &nus_init);
APP_ERROR_CHECK(err_code);
// Initialize LBS.
//init.led_write_handler = led_write_handler;
//err_code = ble_lbs_init(&m_lbs, &init);
//APP_ERROR_CHECK(err_code);
}
/**@brief Function for handling app_uart events.
*
* @details This function will receive a single character from the app_uart module and append it to
* a string. The string will be be sent over BLE when the last character received was a
* 'new line' '\n' (hex 0x0A) or if the string has reached the maximum data length.
*/
/**@snippet [Handling the data received over UART] */
void uart_event_handle(app_uart_evt_t * p_event)
{
static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];
static uint8_t index = 0;
uint32_t err_code;
switch (p_event->evt_type)
{
case APP_UART_DATA_READY:
UNUSED_VARIABLE(app_uart_get(&data_array[index]));
index++;
if ((data_array[index - 1] == '\n') ||
(data_array[index - 1] == '\r') ||
(index >= m_ble_nus_max_data_len))
{
if (index > 1)
{
NRF_LOG_DEBUG("Ready to send data over BLE NUS");
NRF_LOG_HEXDUMP_DEBUG(data_array, index);
do
{
uint16_t length = (uint16_t)index;
err_code = ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);
if ((err_code != NRF_ERROR_INVALID_STATE) &&
(err_code != NRF_ERROR_RESOURCES) &&
(err_code != NRF_ERROR_NOT_FOUND))
{
APP_ERROR_CHECK(err_code);
}
} while (err_code == NRF_ERROR_RESOURCES);
}
index = 0;
}
break;
case APP_UART_COMMUNICATION_ERROR:
APP_ERROR_HANDLER(p_event->data.error_communication);
break;
case APP_UART_FIFO_ERROR:
APP_ERROR_HANDLER(p_event->data.error_code);
break;
default:
break;
}
}
/**@snippet [Handling the data received over UART] */
/**@brief Function for initializing the UART module.
*/
/**@snippet [UART Initialization] */
static void uart_init(void)
{
uint32_t err_code;
app_uart_comm_params_t const comm_params =
{
.rx_pin_no = RX_PIN_NUMBER,
.tx_pin_no = TX_PIN_NUMBER,
.rts_pin_no = RTS_PIN_NUMBER,
.cts_pin_no = CTS_PIN_NUMBER,
.flow_control = APP_UART_FLOW_CONTROL_DISABLED,
.use_parity = false,
#if defined (UART_PRESENT)
.baud_rate = NRF_UART_BAUDRATE_115200
#else
.baud_rate = NRF_UARTE_BAUDRATE_115200
#endif
};
APP_UART_FIFO_INIT(&comm_params,
UART_RX_BUF_SIZE,
UART_TX_BUF_SIZE,
uart_event_handle,
APP_IRQ_PRIORITY_LOWEST,
err_code);
APP_ERROR_CHECK(err_code);
}
/**@snippet [UART Initialization] */
/**@brief Function for initializing the advertising functionality. */
static void advertising_init(void)
{
ret_code_t err_code;
ble_advertising_init_t init;
memset(&init, 0, sizeof(init));
init.advdata.name_type = BLE_ADVDATA_FULL_NAME;
init.advdata.include_appearance = false;// true
init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
init.advdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
init.advdata.uuids_complete.p_uuids = m_adv_uuids;
init.config.ble_adv_fast_enabled = true;
init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
init.config.ble_adv_fast_timeout = APP_ADV_DURATION;
init.evt_handler = on_adv_evt;
err_code = ble_advertising_init(&m_advertising, &init);
APP_ERROR_CHECK(err_code);
ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
}
/**@brief Function for initializing logging. */
static void log_init(void)
{
ret_code_t err_code = NRF_LOG_INIT(NULL);
APP_ERROR_CHECK(err_code);
NRF_LOG_DEFAULT_BACKENDS_INIT();
}
/**@brief Function for initializing the timer. */
static void timer_init(void)
{
ret_code_t err_code = app_timer_init();
APP_ERROR_CHECK(err_code);
}
/**@brief Function for initializing power management.
*/
static void power_management_init(void)
{
ret_code_t err_code;
err_code = nrf_pwr_mgmt_init();
APP_ERROR_CHECK(err_code);
}
/**@brief Function for handling the idle state (main loop).
*
* @details Handles any pending log or key operations, or both, then sleeps until the next event occurs.
*/
static void idle_state_handle(void)
{
ret_code_t err_code;
err_code = nrf_ble_lesc_request_handler();
APP_ERROR_CHECK(err_code);
if (NRF_LOG_PROCESS() == false)
{
nrf_pwr_mgmt_run();
}
}
/*APP_TIMER_DEF(send_some_uart_data); /**< Some timer
void send_some_uart_data_handler(void * p_context)
{
ret_code_t err_code;
uint8_t string[] = "Anubhav Kumar\n\r";
uint16_t length = sizeof(string);
do
{
err_code = ble_nus_string_send(&m_nus, string, &length);
if ( (err_code != NRF_ERROR_INVALID_STATE) && (err_code != NRF_ERROR_BUSY) )
{
APP_ERROR_CHECK(err_code);
}
} while (err_code == NRF_ERROR_BUSY);
}
void send_some_data_uart_init(void)
{
app_timer_create(&send_some_uart_data,APP_TIMER_MODE_REPEATED, send_some_uart_data_handler);
app_timer_start(send_some_uart_data, APP_TIMER_TICKS(1000), NULL);
}*/
int main(void)
{
bool erase_bonds;
// Initialize.
uart_init();
log_init();
timer_init();
buttons_leds_init(&erase_bonds);
power_management_init();
ble_stack_init();
//scan_init();
gap_params_init();
gatt_init();
services_init();
advertising_init();
conn_params_init();
//db_discovery_init();
qwr_init();//
//hrs_init();
//hrs_c_init();
peer_manager_init();//
//send_some_data_uart_init();
// Start execution.
NRF_LOG_INFO("LE Secure Connections example started.");
if (erase_bonds == true)
{
delete_bonds();
// Scanning and advertising is started by PM_EVT_PEERS_DELETE_SUCEEDED.
}
else
{
adv_scan_start();
}
// Enter main loop.
for (;;)
{
idle_state_handle();
}
}
Can you please tell me what type of encryption and decryption procedure is used while bonding/pairing as well as while sending the encrypted data??
And where can I check this and if possible can I change the encryption algorithm used in the code???
