text: /* Copyright (c) 2015 Nordic Semiconductor. All Rights Reserved.
   *
   * The information contained herein is property of Nordic Semiconductor ASA.
   * Terms and conditions of usage are described in detail in NORDIC
   * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
   *
   * Licensees are granted free, non-transferable use of the information. NO
   * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
   * the file.
   *
   */
  
  /** @file
   *
   * @defgroup ble_sdk_bluetooth_template_main main.c
   * @{
   * @ingroup bluetooth_template
   * @brief bluetooth_template main file.
   *
   * This file contains a template for creating a new application using Bluetooth Developper Studio generated code.
   * It has the code necessary to wakeup from button, advertise, get a connection restart advertising on disconnect and if no new
   * connection created go back to system-off mode.
   * It can easily be used as a starting point for creating a new application, the comments identified
   * with 'YOUR_JOB' indicates where and how you can customize.
   */
  
  #include <stdint.h>
  #include <string.h>
  #include "nordic_common.h"
  #include "nrf.h"
  #include "app_error.h"
  #include "ble.h"
  #include "ble_hci.h"
  #include "ble_srv_common.h"
  #include "ble_advdata.h"
  #include "ble_advertising.h"
  #include "ble_conn_params.h"
  #include "boards.h"
  #include "softdevice_handler.h"
  #include "app_timer.h"
  #include "peer_manager.h"
  #include "fds.h"
  #include "fstorage.h"
  #include "ble_conn_state.h"
  #include "bsp.h"
  #include "bsp_btn_ble.h"
  #include "service_if.h"
  #define NRF_LOG_MODULE_NAME "APP"
  #include "nrf_log.h"
  #include "nrf_log_ctrl.h"
  #include "nrf_ble_qwr.h"
  
  #define IS_SRVC_CHANGED_CHARACT_PRESENT  1                                          /**< Include or not the service_changed characteristic. if not enabled, the server's database cannot be changed for the lifetime of the device*/
  
  #if (NRF_SD_BLE_API_VERSION == 3)
  #define NRF_BLE_MAX_MTU_SIZE             GATT_MTU_SIZE_DEFAULT                      /**< MTU size used in the softdevice enabling and to reply to a BLE_GATTS_EVT_EXCHANGE_MTU_REQUEST event. */
  #endif
  
  #define CENTRAL_LINK_COUNT               0                                          /**< Number of central links used by the application. When changing this number remember to adjust the RAM settings*/
  #define PERIPHERAL_LINK_COUNT            1                                          /**< Number of peripheral links used by the application. When changing this number remember to adjust the RAM settings*/
  
  #define DEVICE_NAME                      "Nordic_BDS"                               /**< Name of device. Will be included in the advertising data. */
  #define MANUFACTURER_NAME                "NordicSemiconductor"                      /**< Manufacturer. Will be passed to Device Information Service. */
  #define APP_ADV_INTERVAL                 300                                        /**< The advertising interval (in units of 0.625 ms. This value corresponds to 187.5 ms). */
  #define APP_ADV_TIMEOUT_IN_SECONDS       180                                        /**< The advertising timeout in units of seconds. */
  
  #define APP_TIMER_PRESCALER              0                                          /**< Value of the RTC1 PRESCALER register. */
  #define APP_TIMER_OP_QUEUE_SIZE          4                                          /**< Size of timer operation queues. */
  
  #define MIN_CONN_INTERVAL                MSEC_TO_UNITS(100, UNIT_1_25_MS)           /**< Minimum acceptable connection interval (0.1 seconds). */
  #define MAX_CONN_INTERVAL                MSEC_TO_UNITS(200, UNIT_1_25_MS)           /**< Maximum acceptable connection interval (0.2 second). */
  #define SLAVE_LATENCY                    0                                          /**< Slave latency. */
  #define CONN_SUP_TIMEOUT                 MSEC_TO_UNITS(4000, UNIT_10_MS)            /**< Connection supervisory timeout (4 seconds). */
  
  #define FIRST_CONN_PARAMS_UPDATE_DELAY   APP_TIMER_TICKS(5000, APP_TIMER_PRESCALER) /**< 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, APP_TIMER_PRESCALER)/**< 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. */
  
  #define SEC_PARAM_BOND                   1                                          /**< Perform bonding. */
  #define SEC_PARAM_MITM                   0                                          /**< Man In The Middle protection not required. */
  #define SEC_PARAM_LESC                   0                                          /**< LE Secure Connections not enabled. */
  #define SEC_PARAM_KEYPRESS               0                                          /**< Keypress notifications not enabled. */
  #define SEC_PARAM_IO_CAPABILITIES        BLE_GAP_IO_CAPS_NONE                       /**< No I/O capabilities. */
  #define SEC_PARAM_OOB                    0                                          /**< Out Of Band data not available. */
  #define SEC_PARAM_MIN_KEY_SIZE           7                                          /**< Minimum encryption key size. */
  #define SEC_PARAM_MAX_KEY_SIZE           16                                         /**< Maximum encryption key size. */
  
  #define DEAD_BEEF                        0xDEADBEEF                                 /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */
  
  static uint16_t                          m_conn_handle = BLE_CONN_HANDLE_INVALID;   /**< Handle of the current connection. */
  static nrf_ble_qwr_t                     m_qwr;                                     /**< Queued Writes structure.*/
  
  
  // YOUR_JOB: Use UUIDs for service(s) used in your application.
  static ble_uuid_t m_adv_uuids[] = {{BLE_UUID_DEVICE_INFORMATION_SERVICE, BLE_UUID_TYPE_BLE}}; /**< Universally unique service identifiers. */
  
  
  /**@brief Callback function for asserts in the SoftDevice.
   *
   * @details This function will be called in case of an assert in the SoftDevice.
   *
   * @warning This handler is an example only and does not fit a 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] 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(DEAD_BEEF, line_num, p_file_name);
  }
  
  
  /**@brief Function for handling File Data Storage events.
   *
   * @param[in] p_evt  Peer Manager event.
   * @param[in] cmd
   */
  static void fds_evt_handler(fds_evt_t const * const p_evt)
  {
      if (p_evt->id == FDS_EVT_GC)
      {
          NRF_LOG_INFO("GC completed\n");
      }
  }
  
  
  /**@brief Function for the Timer initialization.
   *
   * @details Initializes the timer module. This creates and starts application timers.
   */
  static void timers_init(void)
  {
  
      // Initialize timer module.
      APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, false);
  
      // Create timers.
  
      /* YOUR_JOB: Create any timers to be used by the application.
                   Below is an example of how to create a timer.
      uint32_t err_code;
      err_code = app_timer_create(&m_app_timer_id, APP_TIMER_MODE_REPEATED, timer_timeout_handler);
      APP_ERROR_CHECK(err_code); */
  }
  
  
  /**@brief Function for the GAP initialization.
   *
   * @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)
  {
      uint32_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);
  
      /* YOUR_JOB: Use an appearance value matching the application's use case.
      err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_);
      APP_ERROR_CHECK(err_code); */
  
      memset(&gap_conn_params, 0, sizeof(gap_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 initializing services that will be used by the application.
   */
  static void services_init(void)
  {
      nrf_ble_qwr_init_t qwr_init;
      uint32_t           err_code;
  
      // Initialize Queued Write Module
      memset(&qwr_init, 0, sizeof(qwr_init));
      qwr_init.mem_buffer.len   = 0;
      qwr_init.mem_buffer.p_mem = NULL;
  
      err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init);
      APP_ERROR_CHECK(err_code);
  
      err_code = bluetooth_init();
      APP_ERROR_CHECK(err_code);
  }
  
  
  /**@brief Function for handling 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 a Connection Parameters error.
   *
   * @param[in] nrf_error  Error code containing information about what went wrong.
   */
  static void conn_params_error_handler(uint32_t nrf_error)
  {
      APP_ERROR_HANDLER(nrf_error);
  }
  
  
  /**@brief Function for initializing the Connection Parameters module.
   */
  static void conn_params_init(void)
  {
      uint32_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;
      cp_init.disconnect_on_fail             = false;
      cp_init.evt_handler                    = on_conn_params_evt;
      cp_init.error_handler                  = conn_params_error_handler;
  
      err_code = ble_conn_params_init(&cp_init);
      APP_ERROR_CHECK(err_code);
  }
  
  
  /**@brief Function for starting timers.
  */
  static void application_timers_start(void)
  {
      /* YOUR_JOB: Start your timers. below is an example of how to start a timer.
      uint32_t err_code;
      err_code = app_timer_start(m_app_timer_id, TIMER_INTERVAL, NULL);
      APP_ERROR_CHECK(err_code); */
  }
  
  
  /**@brief Function for putting the chip into sleep mode.
   *
   * @note This function will not return.
   */
  static void sleep_mode_enter(void)
  {
      uint32_t err_code = bsp_indication_set(BSP_INDICATE_IDLE);
      APP_ERROR_CHECK(err_code);
  
      // Prepare wakeup buttons.
      err_code = bsp_btn_ble_sleep_mode_prepare();
      APP_ERROR_CHECK(err_code);
  
      // Go to system-off mode (this function will not return; wakeup will cause a reset).
      err_code = sd_power_system_off();
      APP_ERROR_CHECK(err_code);
  }
  
  
  /**@brief Function for handling advertising events.
   *
   * @details This function will be called for advertising events which are passed to the application.
   *
   * @param[in] ble_adv_evt  Advertising event.
   */
  static void on_adv_evt(ble_adv_evt_t ble_adv_evt)
  {
      uint32_t err_code;
  
      switch (ble_adv_evt)
      {
          case BLE_ADV_EVT_FAST:
              NRF_LOG_INFO("Fast Advertising\r\n");
              err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
              APP_ERROR_CHECK(err_code);
              break;
          case BLE_ADV_EVT_IDLE:
              sleep_mode_enter();
              break;
          default:
              break;
      }
  }
  
  
  /**@brief Function for handling the Application's BLE Stack events.
   *
   * @param[in] p_ble_evt  Bluetooth stack event.
   */
  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:
              NRF_LOG_INFO("Connected\r\n");
              err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
              APP_ERROR_CHECK(err_code);
              m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
              break; // BLE_GAP_EVT_CONNECTED
  
          case BLE_GAP_EVT_DISCONNECTED:
              NRF_LOG_INFO("Disconnected\r\n");
              m_conn_handle = BLE_CONN_HANDLE_INVALID;
              break; // BLE_GAP_EVT_DISCONNECTED
  
          case BLE_GATTC_EVT_TIMEOUT:
              // Disconnect on GATT Client timeout event.
              NRF_LOG_DEBUG("GATT Client Timeout.\r\n");
              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; // BLE_GATTC_EVT_TIMEOUT
  
          case BLE_GATTS_EVT_TIMEOUT:
              // Disconnect on GATT Server timeout event.
              NRF_LOG_DEBUG("GATT Server Timeout.\r\n");
              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; // BLE_GATTS_EVT_TIMEOUT
  
  #if (NRF_SD_BLE_API_VERSION == 3)
          case BLE_GATTS_EVT_EXCHANGE_MTU_REQUEST:
              err_code = sd_ble_gatts_exchange_mtu_reply(p_ble_evt->evt.gatts_evt.conn_handle,
                                                         NRF_BLE_MAX_MTU_SIZE);
              APP_ERROR_CHECK(err_code);
              break; // BLE_GATTS_EVT_EXCHANGE_MTU_REQUEST
  #endif
  
          default:
              // No implementation needed.
              break;
      }
  }
  
  
  /**@brief Function for dispatching a BLE stack event to all modules with a BLE stack event handler.
   *
   * @details This function is called from the BLE Stack event interrupt handler after a BLE stack
   *          event has been received.
   *
   * @param[in] p_ble_evt  Bluetooth stack event.
   */
  static void ble_evt_dispatch(ble_evt_t * p_ble_evt)
  {
      ble_conn_state_on_ble_evt(p_ble_evt);
      pm_on_ble_evt(p_ble_evt);
      ble_conn_params_on_ble_evt(p_ble_evt);
      bsp_btn_ble_on_ble_evt(p_ble_evt);
      ble_advertising_on_ble_evt(p_ble_evt);
      on_ble_evt(p_ble_evt);
      bluetooth_on_ble_evt(p_ble_evt);
      nrf_ble_qwr_on_ble_evt(&m_qwr, p_ble_evt);
  }
  
  
  /**@brief Function for dispatching a system event to interested modules.
   *
   * @details This function is called from the System event interrupt handler after a system
   *          event has been received.
   *
   * @param[in] sys_evt  System stack event.
   */
  static void sys_evt_dispatch(uint32_t sys_evt)
  {
      // Dispatch the system event to the fstorage module, where it will be
      // dispatched to the Flash Data Storage (FDS) module.
      fs_sys_event_handler(sys_evt);
  
      // Dispatch to the Advertising module last, since it will check if there are any
      // pending flash operations in fstorage. Let fstorage process system events first,
      // so that it can report correctly to the Advertising module.
      ble_advertising_on_sys_evt(sys_evt);
  }
  
  
  /**@brief Function for initializing the BLE stack.
   *
   * @details Initializes the SoftDevice and the BLE event interrupt.
   */
  static void ble_stack_init(void)
  {
      uint32_t err_code;
  
      nrf_clock_lf_cfg_t clock_lf_cfg = NRF_CLOCK_LFCLKSRC;
  
      // Initialize the SoftDevice handler module.
      SOFTDEVICE_HANDLER_INIT(&clock_lf_cfg, NULL);
  
      ble_enable_params_t ble_enable_params;
      err_code = softdevice_enable_get_default_config(CENTRAL_LINK_COUNT,
                                                      PERIPHERAL_LINK_COUNT,
                                                      &ble_enable_params);
      APP_ERROR_CHECK(err_code);
  
      //Check the ram settings against the used number of links
      CHECK_RAM_START_ADDR(CENTRAL_LINK_COUNT,PERIPHERAL_LINK_COUNT);
  
      // Enable BLE stack.
  #if (NRF_SD_BLE_API_VERSION == 3)
      ble_enable_params.gatt_enable_params.att_mtu = NRF_BLE_MAX_MTU_SIZE;
  #endif
      err_code = softdevice_enable(&ble_enable_params);
      APP_ERROR_CHECK(err_code);
  
      // Register with the SoftDevice handler module for BLE events.
      err_code = softdevice_ble_evt_handler_set(ble_evt_dispatch);
      APP_ERROR_CHECK(err_code);
  
      // Register with the SoftDevice handler module for system events.
      err_code = softdevice_sys_evt_handler_set(sys_evt_dispatch);
      APP_ERROR_CHECK(err_code);
  }
  
  
  /**@brief Function for handling events from the BSP module.
   *
   * @param[in]   event   Event generated by button press.
   */
  void bsp_event_handler(bsp_event_t event)
  {
      uint32_t err_code;
      switch (event)
      {
          case BSP_EVENT_SLEEP:
              sleep_mode_enter();
              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();
                  if (err_code != NRF_ERROR_INVALID_STATE)
                  {
                      APP_ERROR_CHECK(err_code);
                  }
              }
              break;
  
          default:
              break;
      }
  }
  
  
  /**@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)
  {
      ret_code_t err_code;
  
      switch (p_evt->evt_id)
      {
          case PM_EVT_BONDED_PEER_CONNECTED:
          {
              NRF_LOG_INFO("Connected to a previously bonded device.\r\n");
          } break;
  
          case PM_EVT_CONN_SEC_SUCCEEDED:
          {
              NRF_LOG_INFO("Connection secured. Role: %d. conn_handle: %d, Procedure: %d\r\n",
                           ble_conn_state_role(p_evt->conn_handle),
                           p_evt->conn_handle,
                           p_evt->params.conn_sec_succeeded.procedure);
          } break;
  
          case PM_EVT_CONN_SEC_FAILED:
          {
              /* Often, when securing fails, it shouldn't be restarted, for security reasons.
               * Other times, it can be restarted directly.
               * Sometimes it can be restarted, but only after changing some Security Parameters.
               * Sometimes, it cannot be restarted until the link is disconnected and reconnected.
               * Sometimes it is impossible, to secure the link, or the peer device does not support it.
               * How to handle this error is highly application dependent. */
          } break;
  
          case PM_EVT_CONN_SEC_CONFIG_REQ:
          {
              // Reject pairing request from an already bonded peer.
              pm_conn_sec_config_t conn_sec_config = {.allow_repairing = false};
              pm_conn_sec_config_reply(p_evt->conn_handle, &conn_sec_config);
          } break;
  
          case PM_EVT_STORAGE_FULL:
          {
              // Run garbage collection on the flash.
              err_code = fds_gc();
              if (err_code == FDS_ERR_BUSY || err_code == FDS_ERR_NO_SPACE_IN_QUEUES)
              {
                  // Retry.
              }
              else
              {
                  APP_ERROR_CHECK(err_code);
              }
          } break;
  
          case PM_EVT_LOCAL_DB_CACHE_APPLY_FAILED:
          {
              // The local database has likely changed, send service changed indications.
              pm_local_database_has_changed();
          } break;
  
          case PM_EVT_PEER_DATA_UPDATE_FAILED:
          {
              // Assert.
              APP_ERROR_CHECK(p_evt->params.peer_data_update_failed.error);
          } break;
  
          case PM_EVT_PEER_DELETE_FAILED:
          {
              // Assert.
              APP_ERROR_CHECK(p_evt->params.peer_delete_failed.error);
          } break;
  
          case PM_EVT_PEERS_DELETE_FAILED:
          {
              // Assert.
              APP_ERROR_CHECK(p_evt->params.peers_delete_failed_evt.error);
          } break;
  
          case PM_EVT_ERROR_UNEXPECTED:
          {
              // Assert.
              APP_ERROR_CHECK(p_evt->params.error_unexpected.error);
          } break;
  
          case PM_EVT_CONN_SEC_START:
          case PM_EVT_PEER_DATA_UPDATE_SUCCEEDED:
          case PM_EVT_PEER_DELETE_SUCCEEDED:
          case PM_EVT_PEERS_DELETE_SUCCEEDED:
          case PM_EVT_LOCAL_DB_CACHE_APPLIED:
          case PM_EVT_SERVICE_CHANGED_IND_SENT:
          case PM_EVT_SERVICE_CHANGED_IND_CONFIRMED:
          default:
              break;
      }
  }
  
  
  /**@brief Function for the Peer Manager initialization.
   *
   * @param[in] erase_bonds  Indicates whether bonding information should be cleared from
   *                         persistent storage during initialization of the Peer Manager.
   */
  static void peer_manager_init(bool erase_bonds)
  {
      ble_gap_sec_params_t sec_param;
      ret_code_t           err_code;
  
      err_code = pm_init();
      APP_ERROR_CHECK(err_code);
  
      if (erase_bonds)
      {
          err_code = pm_peers_delete();
          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.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);
  
      err_code = fds_register(fds_evt_handler);
      APP_ERROR_CHECK(err_code);
  }
  
  
  /**@brief Function for initializing the Advertising functionality.
   */
  static void advertising_init(void)
  {
      uint32_t      err_code;
      ble_advdata_t advdata;
  
      // Build advertising data struct to pass into @ref ble_advertising_init.
      memset(&advdata, 0, sizeof(advdata));
  
      advdata.name_type               = BLE_ADVDATA_FULL_NAME;
      advdata.include_appearance      = true;
      advdata.flags                   = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
      advdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
      advdata.uuids_complete.p_uuids  = m_adv_uuids;
  
      ble_adv_modes_config_t options = {0};
      options.ble_adv_fast_enabled  = true;
      options.ble_adv_fast_interval = APP_ADV_INTERVAL;
      options.ble_adv_fast_timeout  = APP_ADV_TIMEOUT_IN_SECONDS;
  
      err_code = ble_advertising_init(&advdata, NULL, &options, on_adv_evt, NULL);
      APP_ERROR_CHECK(err_code);
  }
  
  
  /**@brief Function for initializing buttons and leds.
   *
   * @param[out] p_erase_bonds  Will be true if the clear bonding button was pressed to wake the application up.
   */
  static void buttons_leds_init(bool * p_erase_bonds)
  {
      bsp_event_t startup_event;
  
      uint32_t err_code = bsp_init(BSP_INIT_LED | BSP_INIT_BUTTONS,
                                   APP_TIMER_TICKS(100, APP_TIMER_PRESCALER),
                                   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 the Power manager.
   */
  static void power_manage(void)
  {
      uint32_t err_code = sd_app_evt_wait();
      APP_ERROR_CHECK(err_code);
  }
  
  
  /**@brief Function for application main entry.
   */
  int main(void)
  {
      uint32_t err_code;
      bool erase_bonds;
  
      err_code = NRF_LOG_INIT(NULL);
      APP_ERROR_CHECK(err_code);
  
      // Initialize.
      timers_init();
      buttons_leds_init(&erase_bonds);
      ble_stack_init();
      peer_manager_init(erase_bonds);
      if (erase_bonds == true)
      {
          NRF_LOG_INFO("Bonds erased!\r\n");
      }
      gap_params_init();
      advertising_init();
      services_init();
      conn_params_init();
  
      // Start execution.
      application_timers_start();
      NRF_LOG_INFO("Bluetooth Dev Studio Start Advertising \r\n");
      err_code = ble_advertising_start(BLE_ADV_MODE_FAST);
      APP_ERROR_CHECK(err_code);
  
      // Enter main loop.
      for (;;)
      {
          if (NRF_LOG_PROCESS() == false)
          {
              power_manage();
          }
      }
  }
  
  /**
   * @}
   */
  