paring,bonding and whitelisting

Hello,

Is there examples of paring,bonding and whitelisting?

The pairing and bonding mode is static password.

It is best to have examples of the central and the peripheral.

Thank you.

Parents
  • Hi,

    There are many examples in the SDK shat support pairing and bonding. You can refer to the Central UART and Peripheral UART samples.

    Whitelisting is called filter accept list in Zephyr, and you can see an example of that in the Peripheral Accept List sample. It is also covered in exersise 2 in lesson 5 in the Bluetooth Low Energy Fundamentals course.

    Regarding static passkey I want to stress that it can be very easily brute forced, so it does not provide any security compared to just works. But it can sometimes be convenient none the less. If you still want to use it, you can refer to this post.

  • Hello,

    Can you help me see why other devices can still be connected after setting the whitelist?

    I whitelisted on the central  side because I entered the password on the peripheral side.

    Here is the central code. Please ignore the comments.

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     */
    #include <stdio.h>
    #include <stdint.h>
    #include <stdbool.h>
    #include "nordic_common.h"
    #include "app_error.h"
    #include "app_uart.h"
    #include "ble_db_discovery.h"
    #include "app_timer.h"
    #include "app_util.h"
    #include "bsp_btn_ble.h"
    #include "ble.h"
    #include "ble_gap.h"
    #include "ble_hci.h"
    #include "nrf_sdh.h"
    #include "nrf_sdh_ble.h"
    #include "nrf_sdh_soc.h"
    #include "ble_nus_c.h"
    #include "nrf_ble_gatt.h"
    #include "nrf_pwr_mgmt.h"
    #include "nrf_ble_scan.h"
    
    #include "nrf_log.h"
    #include "nrf_log_ctrl.h"
    #include "nrf_log_default_backends.h"
    
    // shy - btn
    #include "ble_btn_c.h"
    // shy - btn
    
    ///////////Added for bonding//////////
    #include "peer_manager.h"
    #include "peer_manager_handler.h"
    
    #define SEC_PARAM_BOND              1                                   /**< Perform bonding. */
    #define SEC_PARAM_MITM              1                                   /**< Enable MITM protection */
    #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_DISPLAY_ONLY        /**< Display Only. */ // -Shy
    #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. */
    //////////////Added for bonding///////
    
    #define APP_BLE_CONN_CFG_TAG    1                                       /**< Tag that refers to the BLE stack configuration set with @ref sd_ble_cfg_set. The default tag is @ref BLE_CONN_CFG_TAG_DEFAULT. */
    #define APP_BLE_OBSERVER_PRIO   3                                       /**< BLE observer priority of the application. There is no need to modify this value. */
    
    #define UART_TX_BUF_SIZE        256                                     /**< UART TX buffer size. */
    #define UART_RX_BUF_SIZE        256                                     /**< UART RX buffer size. */
    
    #define NUS_SERVICE_UUID_TYPE   BLE_UUID_TYPE_VENDOR_BEGIN              /**< UUID type for the Nordic UART Service (vendor specific). */
    
    #define ECHOBACK_BLE_UART_DATA  1                                       /**< Echo the UART data that is received over the Nordic UART Service (NUS) back to the sender. */
    
    
    BLE_NUS_C_DEF(m_ble_nus_c);                                             /**< BLE Nordic UART Service (NUS) client instance. */
    NRF_BLE_GATT_DEF(m_gatt);                                               /**< GATT module instance. */
    BLE_DB_DISCOVERY_DEF(m_db_disc);                                        /**< Database discovery module instance. */
    NRF_BLE_SCAN_DEF(m_scan);                                               /**< Scanning Module instance. */
    NRF_BLE_GQ_DEF(m_ble_gatt_queue,                                        /**< BLE GATT Queue instance. */
                   NRF_SDH_BLE_CENTRAL_LINK_COUNT,
                   NRF_BLE_GQ_QUEUE_SIZE);
    // shy - btn
    BLE_BTN_C_DEF(m_ble_btn_c);
    // shy - btn
    
    static uint16_t m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - OPCODE_LENGTH - HANDLE_LENGTH; /**< Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module. */
    
    ///**@brief NUS UUID. */
    //static ble_uuid_t const m_nus_uuid =
    //{
    //    .uuid = BLE_UUID_NUS_SERVICE,
    //    .type = NUS_SERVICE_UUID_TYPE
    //};
    
    ////////////Added for bonding///////////
    // Static passkey
    #define STATIC_PASSKEY    "123456" 
    // static ble_opt_t    m_static_pin_option;
    uint8_t passkey[] = STATIC_PASSKEY; 
    ////////////Added for bonding///////////
    
    // shy - scan
    static char const m_target_periph_name[] = "Nordic_UART";
    
    // ?¨ò?é¨?è2?êy
    static ble_gap_scan_params_t m_scan_params = 
    {
        .active        = 1,                            // 1?a?÷?ˉé¨?è£??é??μ?1?2¥êy?Y?°é¨?è??μ÷êy?Y
        .interval_us   = 10000,   // é¨?è????£o160*0.625 = 100ms  
        .window_us     = 5000,     // é¨?è′°?ú£o80*0.625 = 50ms   
        .timeout       = NRF_BLE_SCAN_SCAN_DURATION,   // é¨?è3?D?μ?ê±??£oéè???a0£?ò??±é¨?è£??±μ??÷è·μ?í£?1é¨?è
        .filter_policy = BLE_GAP_SCAN_FP_ACCEPT_ALL,   // é¨?è?ùóDBLEéè±?£?2?×??T??
        .scan_phys     = BLE_GAP_PHY_1MBPS,            // é¨?è1MBPSμ?PHY
    };
    
    static ble_gap_conn_params_t m_conn_params = 
    {
        .min_conn_interval  = MSEC_TO_UNITS(NRF_BLE_SCAN_MIN_CONNECTION_INTERVAL, UNIT_1_25_MS),  // ×?D?á??ó????7.5ms
        .max_conn_interval  = MSEC_TO_UNITS(NRF_BLE_SCAN_MAX_CONNECTION_INTERVAL, UNIT_1_25_MS),  // ×?′óá??ó????30ms  
        .slave_latency      = NRF_BLE_SCAN_SLAVE_LATENCY,                                         // òt2??ü?ú0 
        .conn_sup_timeout   = MSEC_TO_UNITS(NRF_BLE_SCAN_SUPERVISION_TIMEOUT, UNIT_10_MS),        // 3?ê±ê±??4000ms 
    };
    // shy - scan
    
    // shy - btn
    #include "ble_btn_c.h"
    // shy - btn
    
    ////////////Added for bonding//////////////
    /**@brief Clear bond information from persistent storage.
     */
    static void delete_bonds(void) // -Shy
    {
        ret_code_t err_code;
    
        NRF_LOG_INFO("Erase bonds");
    
        err_code = pm_peers_delete();
        APP_ERROR_CHECK(err_code);
    }
    ////////////Added for bonding//////////////
    
    
    /**@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 only an example 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 the Nordic UART Service Client errors.
     *
     * @param[in]   nrf_error   Error code containing information about what went wrong.
     */
    static void nus_error_handler(uint32_t nrf_error)
    {
        APP_ERROR_HANDLER(nrf_error);
    }
    
    //从本机Flash中存储的对端设备数据中检索peer id的过滤列表,之后将得到的peer id加到白名单
    static void whitelist_set(pm_peer_id_list_skip_t skip)
    {
    	  //定义一个ID句柄数组,该ID句柄用于唯一标识在本机Flash中存储了绑定数据的对端设备
    	  pm_peer_id_t peer_ids[BLE_GAP_WHITELIST_ADDR_MAX_COUNT];
    	  //白名单中最大地址数量
        uint32_t     peer_id_count = BLE_GAP_WHITELIST_ADDR_MAX_COUNT;
        //检索peer id的过滤列表,检索后得到的是ID句柄
        ret_code_t err_code = pm_peer_id_list(peer_ids, &peer_id_count, PM_PEER_ID_INVALID, skip);
        APP_ERROR_CHECK(err_code);
    
        //设置白名单
        err_code = pm_whitelist_set(peer_ids, peer_id_count);
        APP_ERROR_CHECK(err_code);
    }
    
    ////////////Added for bonding//////////////
    /**@brief Function for starting advertising.
     */
    void scan_start(bool erase_bonds)  // -Shy
    {
    		ret_code_t ret;
        if (erase_bonds == true)
        {
    				//删除Flash中存储的配对信息,执行完删除操作后,会产生PM_EVT_PEERS_DELETE_SUCCEEDED事件,在该事件下会启动广播
            delete_bonds();
            // Advertising is started by PM_EVT_PEERS_DELETE_SUCCEEDED event.
        }
        else
        {
    				//设置白名单(仅添加具有公共地址或随机静态地址的对端设备)
    			  whitelist_set(PM_PEER_ID_LIST_SKIP_NO_ID_ADDR);
    			
    				ret = nrf_ble_scan_start(&m_scan);
    				APP_ERROR_CHECK(ret);
    
    				ret = bsp_indication_set(BSP_INDICATE_SCANNING);
    				APP_ERROR_CHECK(ret);
        }
    }
    ////////////Added for bonding//////////////
    
    //设置过滤设备的设备身份列表
    static void identities_set(pm_peer_id_list_skip_t skip)
    {
        //定义一个ID句柄数组,该ID句柄用于唯一标识在本机Flash中存储了绑定数据的对端设备
    	  pm_peer_id_t peer_ids[BLE_GAP_DEVICE_IDENTITIES_MAX_COUNT];
        uint32_t     peer_id_count = BLE_GAP_DEVICE_IDENTITIES_MAX_COUNT;
        //检索peer id的过滤列表,检索后得到的是ID句柄
        ret_code_t err_code = pm_peer_id_list(peer_ids, &peer_id_count, PM_PEER_ID_INVALID, skip);
        APP_ERROR_CHECK(err_code);
        //设置设备身份列表
        err_code = pm_device_identities_list_set(peer_ids, peer_id_count);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@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;
    
             case NRF_BLE_SCAN_EVT_CONNECTED:
             {
    							
                  ble_gap_evt_connected_t const * p_connected =
                                   p_scan_evt->params.connected.p_connected;
                 // Scan is automatically stopped by the connection.
                 NRF_LOG_INFO("Connecting to target %02x%02x%02x%02x%02x%02x",
                          p_connected->peer_addr.addr[0],
                          p_connected->peer_addr.addr[1],
                          p_connected->peer_addr.addr[2],
                          p_connected->peer_addr.addr[3],
                          p_connected->peer_addr.addr[4],
                          p_connected->peer_addr.addr[5]
                          );
             } break;
    
             case NRF_BLE_SCAN_EVT_SCAN_TIMEOUT:
             {
                 NRF_LOG_INFO("Scan timed out.");
                 scan_start(false);
             } break;
    				 
    				 	//白名单请求:广播程序模块向主应用程序请求白名单,主应用程序应在接收到该事件后设置白名单
    				 case NRF_BLE_SCAN_EVT_WHITELIST_REQUEST: //BLE_ADV_EVT_WHITELIST_REQUEST
            {
                //定义地址结构体数组变量
    					  ble_gap_addr_t whitelist_addrs[BLE_GAP_WHITELIST_ADDR_MAX_COUNT];
    					  //定义IRK结构体数组变量
                ble_gap_irk_t  whitelist_irks[BLE_GAP_WHITELIST_ADDR_MAX_COUNT];
    					  //白名单和IRK存储的最大数量
                uint32_t       addr_cnt = BLE_GAP_WHITELIST_ADDR_MAX_COUNT;
                uint32_t       irk_cnt  = BLE_GAP_WHITELIST_ADDR_MAX_COUNT;
                //获取之前设置的白名单,用于ble_advertising_whitelist_reply函数检查白名单和IRK数量
                err_code = pm_whitelist_get(whitelist_addrs, &addr_cnt,
                                            whitelist_irks,  &irk_cnt);
                APP_ERROR_CHECK(err_code);
                NRF_LOG_DEBUG("pm_whitelist_get returns %d addr in whitelist and %d irk whitelist",
                              addr_cnt, irk_cnt);
    					
                //设置设备身份列表
                identities_set(PM_PEER_ID_LIST_SKIP_NO_IRK);
    
    //            //检查白名单和IRK数量是否正确
    //            err_code = ble_advertising_whitelist_reply(&m_advertising,
    //                                                       whitelist_addrs,
    //                                                       addr_cnt,
    //                                                       whitelist_irks,
    //                                                       irk_cnt);
    //            APP_ERROR_CHECK(err_code);
            } break; 
    
             default:
                 break;
        }
    }
    
    
    /**@brief Function for initializing the scanning and setting the filters.
     */
    void scan_init(void) // shy
    {
        ret_code_t          err_code;
        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;
    		init_scan.p_scan_param     = &m_scan_params;
    		init_scan.p_conn_param 		 = &m_conn_params;
    
    		err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_SCAN_INIT, NULL, 4);
    		APP_ERROR_CHECK(err_code);
    	
        err_code = nrf_ble_scan_init(&m_scan, &init_scan, scan_evt_handler);
        APP_ERROR_CHECK(err_code);
    
        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_filters_enable(&m_scan, NRF_BLE_SCAN_NAME_FILTER, false);
        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_nus_c_on_db_disc_evt(&m_ble_nus_c, p_evt);
    		ble_btn_c_on_db_disc_evt(&m_ble_btn_c, p_evt);
    }
    
    
    /**@brief Function for handling characters received by the Nordic UART Service (NUS).
     *
     * @details This function takes a list of characters of length data_len and prints the characters out on UART.
     *          If @ref ECHOBACK_BLE_UART_DATA is set, the data is sent back to sender.
     */
    static void ble_nus_chars_received_uart_print(uint8_t * p_data, uint16_t data_len)
    {
        ret_code_t ret_val;
    
        NRF_LOG_DEBUG("Receiving data.");
        NRF_LOG_HEXDUMP_DEBUG(p_data, data_len);
    
        for (uint32_t i = 0; i < data_len; i++)
        {
            do
            {
                ret_val = app_uart_put(p_data[i]);
                if ((ret_val != NRF_SUCCESS) && (ret_val != NRF_ERROR_BUSY))
                {
                    NRF_LOG_ERROR("app_uart_put failed for index 0x%04x.", i);
                    APP_ERROR_CHECK(ret_val);
                }
            } while (ret_val == NRF_ERROR_BUSY);
        }
        if (p_data[data_len-1] == '\r')
        {
            while (app_uart_put('\n') == NRF_ERROR_BUSY);
        }
        if (ECHOBACK_BLE_UART_DATA)
        {
            // Send data back to the peripheral.
            do
            {
                ret_val = ble_nus_c_string_send(&m_ble_nus_c, p_data, data_len);
                if ((ret_val != NRF_SUCCESS) && (ret_val != NRF_ERROR_BUSY))
                {
                    NRF_LOG_ERROR("Failed sending NUS message. Error 0x%x. ", ret_val);
                    APP_ERROR_CHECK(ret_val);
                }
            } while (ret_val == NRF_ERROR_BUSY);
        }
    }
    
    
    /**@brief   Function for handling app_uart events.
     *
     * @details This function receives a single character from the app_uart module and appends it to
     *          a string. The string is sent over BLE when the last character received is a
     *          'new line' '\n' (hex 0x0A) or if the string reaches the maximum data length.
     */
    void uart_event_handle(app_uart_evt_t * p_event)
    {
        static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];
        static uint16_t index = 0;
        uint32_t ret_val;
    
        switch (p_event->evt_type)
        {
            /**@snippet [Handling data from UART] */
            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)))
                {
                    NRF_LOG_DEBUG("Ready to send data over BLE NUS");
                    NRF_LOG_HEXDUMP_DEBUG(data_array, index);
    
                    do
                    {
                        ret_val = ble_nus_c_string_send(&m_ble_nus_c, data_array, index);
                        if ( (ret_val != NRF_ERROR_INVALID_STATE) && (ret_val != NRF_ERROR_RESOURCES) )
                        {
                            APP_ERROR_CHECK(ret_val);
                        }
                    } while (ret_val == NRF_ERROR_RESOURCES);
    
                    index = 0;
                }
                break;
    
            /**@snippet [Handling data from UART] */
            case APP_UART_COMMUNICATION_ERROR:
                NRF_LOG_ERROR("Communication error occurred while handling UART.");
                APP_ERROR_HANDLER(p_event->data.error_communication);
                break;
    
            case APP_UART_FIFO_ERROR:
                NRF_LOG_ERROR("Error occurred in FIFO module used by UART.");
                APP_ERROR_HANDLER(p_event->data.error_code);
                break;
    
            default:
                break;
        }
    }
    
    
    /**@brief Callback handling Nordic UART Service (NUS) client events.
     *
     * @details This function is called to notify the application of NUS client events.
     *
     * @param[in]   p_ble_nus_c   NUS client handle. This identifies the NUS client.
     * @param[in]   p_ble_nus_evt Pointer to the NUS client event.
     */
    
    /**@snippet [Handling events from the ble_nus_c module] */
    static void ble_nus_c_evt_handler(ble_nus_c_t * p_ble_nus_c, ble_nus_c_evt_t const * p_ble_nus_evt)
    {
        ret_code_t err_code;
    
        switch (p_ble_nus_evt->evt_type)
        {
            case BLE_NUS_C_EVT_DISCOVERY_COMPLETE:
                NRF_LOG_INFO("Discovery complete.");
                err_code = ble_nus_c_handles_assign(p_ble_nus_c, p_ble_nus_evt->conn_handle, &p_ble_nus_evt->handles);
                APP_ERROR_CHECK(err_code);
    
                err_code = ble_nus_c_tx_notif_enable(p_ble_nus_c);
                APP_ERROR_CHECK(err_code);
                NRF_LOG_INFO("Connected to device with Nordic UART Service.");
                break;
    
            case BLE_NUS_C_EVT_NUS_TX_EVT:
                ble_nus_chars_received_uart_print(p_ble_nus_evt->p_data, p_ble_nus_evt->data_len);
                break;
    
            case BLE_NUS_C_EVT_DISCONNECTED:
                NRF_LOG_INFO("Disconnected.");
                scan_start(false);
                break;
        }
    }
    /**@snippet [Handling events from the ble_nus_c module] */
    
    
    /**
     * @brief Function for handling shutdown events.
     *
     * @param[in]   event       Shutdown type.
     */
    static bool shutdown_handler(nrf_pwr_mgmt_evt_t event)
    {
        ret_code_t err_code;
    
        err_code = bsp_indication_set(BSP_INDICATE_IDLE);
        APP_ERROR_CHECK(err_code);
    
        switch (event)
        {
            case NRF_PWR_MGMT_EVT_PREPARE_WAKEUP:
                // Prepare wakeup buttons.
                err_code = bsp_btn_ble_sleep_mode_prepare();
                APP_ERROR_CHECK(err_code);
                break;
    
            default:
                break;
        }
    
        return true;
    }
    
    NRF_PWR_MGMT_HANDLER_REGISTER(shutdown_handler, APP_SHUTDOWN_HANDLER_PRIORITY);
    
    void pair_start()
    {
    	ret_code_t            err_code;
    				
    //	if(pair_start_flag == 1)
    	{
    		/////////Added for bonding//////// 
    		err_code = pm_conn_secure(0x00, false);
    		if (err_code != NRF_ERROR_BUSY)
    		{
    				APP_ERROR_CHECK(err_code);
    		}
    		/////////Added for bonding////////
    //		pair_start_flag = 2;		
    	}
    }
    
    /**@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)
    {
        ret_code_t            err_code;
        ble_gap_evt_t const * p_gap_evt = &p_ble_evt->evt.gap_evt;
    
        switch (p_ble_evt->header.evt_id)
        {
            case BLE_GAP_EVT_CONNECTED:
    						NRF_LOG_INFO("BLE_GAP_EVT_CONNECTED.");
    						pair_start();
                break;
    
            case BLE_GAP_EVT_DISCONNECTED:
    
                NRF_LOG_INFO("Disconnected. conn_handle: 0x%x, reason: 0x%x",
                             p_gap_evt->conn_handle,
                             p_gap_evt->params.disconnected.reason);
                break;
    
            case BLE_GAP_EVT_TIMEOUT:
                if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN)
                {
                    NRF_LOG_INFO("Connection Request timed out.");
                }
                break;
    
            /////////Remove for bonding///////////
           /* case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
                // Pairing not supported.
                err_code = sd_ble_gap_sec_params_reply(p_ble_evt->evt.gap_evt.conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
                APP_ERROR_CHECK(err_code);
                break;*/
           /////////Remove for bonding///////////
    
            case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST:
                // Accepting 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_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_GATTC_EVT_TIMEOUT:
                // Disconnect on GATT Client timeout event.
                NRF_LOG_DEBUG("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("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;
    				
    //				case BLE_GAP_EVT_SEC_REQUEST:  /** ·μ?????????ó*/
    //						ble_gap_sec_params_t sec_params;
    //						memset(&sec_params,0,sizeof(ble_gap_sec_params_t));
    //						err_code = sd_ble_gap_sec_params_reply(p_ble_evt->evt.gap_evt.conn_handle,BLE_GAP_SEC_STATUS_SUCCESS,&sec_params,NULL);
    //						APP_ERROR_CHECK(err_code);
    //        break;
    				
    //				case BLE_GAP_EVT_AUTH_STATUS:
    //						if(p_ble_evt->evt.gap_evt.params.auth_status.auth_status == BLE_GAP_SEC_STATUS_SUCCESS) {
    //								NRF_LOG_INFO("Pair success!");
    //								
    
    //						} else {
    //								NRF_LOG_INFO("Pair failed!");
    //								sd_ble_gap_disconnect(p_ble_evt->evt.gap_evt.conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    //						}
    //        break;
    				case BLE_GAP_EVT_AUTH_STATUS:
    						if(p_ble_evt->evt.gap_evt.params.auth_status.auth_status == BLE_GAP_SEC_STATUS_SUCCESS)
    						{
    								NRF_LOG_INFO("Pair success.");
    						}
    						break;
    
    
            default:
                break;
        }
    }
    
    
    /**@brief Function for initializing the BLE stack.
     *
     * @details Initializes the SoftDevice and the BLE event interrupt.
     */
    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 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 handling events from the GATT library. */
    void gatt_evt_handler(nrf_ble_gatt_t * p_gatt, nrf_ble_gatt_evt_t const * p_evt)
    {
    		ret_code_t            err_code;
    	
        if (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED)
        {
    				printf("a1PAIR_OKs");
    				err_code = ble_nus_c_handles_assign(&m_ble_nus_c, 0x00, NULL);
    				APP_ERROR_CHECK(err_code);
    				//printf("Connection handle1: %u\n", p_ble_evt->evt.gap_evt.conn_handle);
    				err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
    				APP_ERROR_CHECK(err_code);
    				// start discovery of services. The NUS Client waits for a discovery result
    				err_code = ble_db_discovery_start(&m_db_disc, 0x00);
    				//printf("Connection handle2: %u\n", p_ble_evt->evt.gap_evt.conn_handle);
    				APP_ERROR_CHECK(err_code);
    			
            NRF_LOG_INFO("ATT MTU exchange completed.");
            m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;
            NRF_LOG_INFO("Ble NUS max data length set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len);
    			
        }
    }
    
    
    /**@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_central_set(&m_gatt, NRF_SDH_BLE_GATT_MAX_MTU_SIZE);
        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)
    {
        ret_code_t err_code;
    
        switch (event)
        {
            case BSP_EVENT_SLEEP:
                nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_SYSOFF);
                break;
    
            case BSP_EVENT_DISCONNECT:
                err_code = sd_ble_gap_disconnect(m_ble_nus_c.conn_handle,
                                                 BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
                if (err_code != NRF_ERROR_INVALID_STATE)
                {
                    APP_ERROR_CHECK(err_code);
                }
                break;
    
            default:
                break;
        }
    }
    
    /**@brief Function for initializing the UART. */
    static void uart_init(void) // shy
    {
        ret_code_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   = true,
            .baud_rate    = UART_BAUDRATE_BAUDRATE_Baud115200
        };
    
        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);
    }
    
    /**@brief Function for initializing the Nordic UART Service (NUS) client. */
    static void nus_c_init(void)
    {
        ret_code_t       err_code;
        ble_nus_c_init_t init;
    
        init.evt_handler   = ble_nus_c_evt_handler;
        init.error_handler = nus_error_handler;
        init.p_gatt_queue  = &m_ble_gatt_queue;
    
        err_code = ble_nus_c_init(&m_ble_nus_c, &init);
        APP_ERROR_CHECK(err_code);
    }
    
    ///////////Added for bonding///////////
    /**@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:
    //            scan_start(false);
    //            break;
    
    //        default:
    //            break;
    //    }
    	
    	  switch (p_evt->evt_id)
        {
            //存储的绑定信息已成功删除
    			  case PM_EVT_PEERS_DELETE_SUCCEEDED:
    					  //若程序启动时执行了删除绑定信息操作,在该事件下启动广播
                scan_start(false);
                break;
    				//对端设备数据更新事件
    				case PM_EVT_PEER_DATA_UPDATE_SUCCEEDED:
                if (     p_evt->params.peer_data_update_succeeded.flash_changed
                     && (p_evt->params.peer_data_update_succeeded.data_id == PM_PEER_DATA_ID_BONDING))
                {
                    NRF_LOG_INFO("New Bond, add the peer to the whitelist if possible");
                    //设置白名单(仅添加具有公共地址或随机静态地址的对端设备)
                    whitelist_set(PM_PEER_ID_LIST_SKIP_NO_ID_ADDR);
                }
                break;
    
            default:
                break;
        }
    }
    /////////////Added for bonding/////////////
    
    
    
    
    //////////////Added for bonding//////////////
    /**@brief Function for initializing the Peer Manager.
     *
     * @param[in] erase_bonds  Indicates whether the bonding information must be cleared from
     *                         persistent storage during the initialization of the Peer Manager.
     */
    static void peer_manager_init()
    {
        ret_code_t           err_code;
        ble_gap_sec_params_t sec_param;
    
        err_code = pm_init();
        APP_ERROR_CHECK(err_code);
    
        err_code = pm_register(pm_evt_handler);
        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);
    }
    //////////////Added for bonding//////////////
    /**@brief Function for initializing buttons and leds. */
    static void buttons_leds_init(void)
    {
        ret_code_t err_code;
        bsp_event_t startup_event;
    
        err_code = bsp_init(BSP_INIT_LEDS, bsp_event_handler);
        APP_ERROR_CHECK(err_code);
    
        err_code = bsp_btn_ble_init(NULL, &startup_event);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@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 the nrf log module. */
    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 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 initializing the database discovery module. */
    static void db_discovery_init(void)
    {
        ble_db_discovery_init_t db_init;
    
        memset(&db_init, 0, sizeof(ble_db_discovery_init_t));
    
        db_init.evt_handler  = db_disc_handler;
        db_init.p_gatt_queue = &m_ble_gatt_queue;
    
        ret_code_t err_code = ble_db_discovery_init(&db_init);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for handling the idle state (main loop).
     *
     * @details Handles any pending log operations, then sleeps until the next event occurs.
     */
    static void idle_state_handle(void)
    {
        if (NRF_LOG_PROCESS() == false)
        {
            nrf_pwr_mgmt_run();
        }
    }
    
    
    //éè???2ì??ü??
    static void set_static_passkey()
    {
        //?¨ò?ò???BLE?????á11ì?±?á?
        static ble_opt_t    m_static_pin_option;
        //?¨ò?ò???±£′??2ì??ü??μ?êy×é
        uint8_t passkey[] = STATIC_PASSKEY;
        //m_static_pin_option?Dμ??ü?????????ò′?·??2ì??ü??μ?êy×é
        m_static_pin_option.gap_opt.passkey.p_passkey = &passkey[0];
        //éè??GAP?????Dμ??ü??????μ??μ
        uint32_t err_code =  sd_ble_opt_set(BLE_GAP_OPT_PASSKEY, &m_static_pin_option);
        //?ì2éoˉêy·μ???μ
        APP_ERROR_CHECK(err_code);     
    }
    
    
    //uint8_t usart_send_packet(uint16_t Key_Value, uint8_t DMG_status)
    uint8_t usart_send_packet(uint8_t *key_value)
    {
    		for (uint32_t i = 0; i < 10; i++)
    		{
    			NRF_LOG_INFO("%d:%x",i,key_value[i]);
    			if(key_value[4] == 1)
    			{
    				NRF_LOG_INFO("nrf_gpio_pin_set(6);");
    				nrf_gpio_pin_set(6);
    			}
    			else
    			{
    				NRF_LOG_INFO("nrf_gpio_pin_clear(6);");
    				nrf_gpio_pin_clear(6);
    			}
    		}
    //		/*send key value*/
    		app_uart_put(key_value[0]);
    		app_uart_put(key_value[1]);
    		app_uart_put(key_value[2]);
    		app_uart_put(key_value[3]);
    		app_uart_put(key_value[4]);
    		app_uart_put(key_value[5]);
    		app_uart_put(key_value[6]);
    		app_uart_put(key_value[7]);
    		app_uart_put(key_value[8]);
    		app_uart_put(key_value[9]);
    
    		return 0; 
    }
    
    
    //******************************************************************
    // fn 		: ble_btn_c_evt_handler
    // brief 	: BTN·t??ê??t
    // param 	: none
    // return : none                 
    static void ble_btn_c_evt_handler(ble_btn_c_t * p_ble_btn_c, ble_btn_c_evt_t * p_evt)
    {
        ret_code_t err_code;
    		static uint8_t data_array[244];
        static uint16_t index = 0;
    		static uint16_t uc_idx;
    		static uint32_t current_index = 0;
    
        switch (p_evt->evt_type)
        {
            case BLE_BTN_C_EVT_DISCOVERY_COMPLETE:
                NRF_LOG_INFO("Discovery complete.");
                err_code = ble_btn_c_handles_assign(&m_ble_btn_c, p_evt->conn_handle, &p_evt->params.peer_db);
                APP_ERROR_CHECK(err_code);
                NRF_LOG_INFO("Connected to device with Ghostyu BTN Service.");
                
                err_code = ble_btn_c_tx_notif_enable(&m_ble_btn_c);
                APP_ERROR_CHECK(err_code);  
                NRF_LOG_INFO("Enable notification.");
                break;
                
    				case BLE_BTN_C_EVT_BTN_NOTIFY:
    						NRF_LOG_INFO("Receiving data.");
    						for (uint32_t i = 0; i < p_evt->data_len; i++)
    						{
    								if (current_index < 10) 
    								{
    										data_array[current_index] = p_evt->p_data[i];
    										current_index++;
    										if(current_index==10)
    												current_index = 0;
    								}
    								else
    								{
    										NRF_LOG_INFO("Buffer overflow, data cannot be stored.\n");
    										break;
    								}
    						}
    						index++;
    						uc_idx = index-1;
    						switch(uc_idx)
    						{
    								case 0x00:
    										if(p_evt->p_data[0] == 'a')
    										{
    		//											NRF_LOG_INFO("p_evt->p_data[0]==FRAME_HEAD");
    										}
    										else
    										{
    												index = 0;
    										}
    										break;
    								case 0x01:
    										if((p_evt->p_data[0]=='1')||(p_evt->p_data[0]=='2')||(p_evt->p_data[0]=='3')||(p_evt->p_data[0]=='4')||(p_evt->p_data[0]=='5'))
    										{			
    		//											NRF_LOG_INFO("p_evt->p_data[1]=='2'");
    										}
    										else
    										{
    												index = 0;
    										}
    										break;
    								case 0x02:
    								case 0x03:						
    								case 0x04:							
    								case 0x05:						
    								case 0x06:							
    								case 0x07:							
    								case 0x08:
    										break;
    								case 0x09:
    										if(p_evt->p_data[0]=='d')
    										{
    												usart_send_packet(data_array);			
    												index = 0;	
    										}
    										else
    										{
    												index = 0;
    										}			
    										break;	
    						}
    						break;
                
    				default:
    						break;
        }
    }
    
    //******************************************************************
    // fn 		: btn_c_init
    // brief  : 3?ê??ˉBTN·t???í?§??£¨Ghostyu BTN Service client£?
    // param  : none
    // return : none
    static void btn_c_init(void)
    {
        ret_code_t       err_code;
        ble_btn_c_init_t init;
    
        init.evt_handler = ble_btn_c_evt_handler;
    
        err_code = ble_btn_c_init(&m_ble_btn_c, &init);
        APP_ERROR_CHECK(err_code);
    }
    
    int main(void)
    {
        // Initialize.
        log_init();
        timer_init();
        uart_init();
        buttons_leds_init();
        db_discovery_init();
        power_management_init();
        ble_stack_init();
    		set_static_passkey();
        gatt_init();
    		// shy - btn
    		btn_c_init();
    		// shy - btn
        nus_c_init();
        scan_init();
        peer_manager_init();
    	
        // Start execution.
        printf("BLE UART central example started.\r\n");
        NRF_LOG_INFO("BLE UART central example started.");
        scan_start(false);
    
        // Enter main loop.
        for (;;)
        {
            idle_state_handle();
        }
    }
    

    Here is the peripheral code.

    /**
     * Copyright (c) 2014 - 2021, Nordic Semiconductor ASA
     *
     * All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without modification,
     * are permitted provided that the following conditions are met:
     *
     * 1. Redistributions of source code must retain the above copyright notice, this
     *    list of conditions and the following disclaimer.
     *
     * 2. Redistributions in binary form, except as embedded into a Nordic
     *    Semiconductor ASA integrated circuit in a product or a software update for
     *    such product, must reproduce the above copyright notice, this list of
     *    conditions and the following disclaimer in the documentation and/or other
     *    materials provided with the distribution.
     *
     * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
     *    contributors may be used to endorse or promote products derived from this
     *    software without specific prior written permission.
     *
     * 4. This software, with or without modification, must only be used with a
     *    Nordic Semiconductor ASA integrated circuit.
     *
     * 5. Any software provided in binary form under this license must not be reverse
     *    engineered, decompiled, modified and/or disassembled.
     *
     * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
     * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
     * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
     * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
     * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     */
    /** @file
     *
     * @defgroup ble_sdk_uart_over_ble_main main.c
     * @{
     * @ingroup  ble_sdk_app_nus_eval
     * @brief    UART over BLE application main file.
     *
     * This file contains the source code for a sample application that uses the Nordic UART service.
     * This application uses the @ref srvlib_conn_params module.
     */
    
    
    #include <stdint.h>
    #include <string.h>
    #include "nordic_common.h"
    #include "nrf.h"
    #include "ble_hci.h"
    #include "ble_advdata.h"
    #include "ble_advertising.h"
    #include "ble_conn_params.h"
    #include "nrf_sdh.h"
    #include "nrf_sdh_soc.h"
    #include "nrf_sdh_ble.h"
    #include "nrf_ble_gatt.h"
    #include "nrf_ble_qwr.h"
    #include "app_timer.h"
    #include "ble_nus.h"
    #include "app_uart.h"
    #include "app_util_platform.h"
    #include "bsp_btn_ble.h"
    #include "nrf_pwr_mgmt.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"
    
    #include "ble_btn.h"
    #include "btd_serial_btn.h"
    #include "fdc2114.h"
    #include "btd_serial_led.h"
    //#include "algorithm.h"
    //#include "flash.h"
    //#include "selftest.h"
    
    #include "nrf_delay.h"
    
    
    ///////////Added for bonding////////////
    #include "peer_manager.h"
    #include "peer_manager_handler.h"
    
    
    #define SEC_PARAM_BOND                  1                                       /**< Perform bonding. */
    #define SEC_PARAM_MITM                  1                                       /**< Man In The Middle protection is enabled. */
    #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_KEYBOARD_ONLY      			/**< Keyboard Only. */
    #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. */
    ///////////Added for bonding////////////
    
    #define APP_BLE_CONN_CFG_TAG            1                                           /**< A tag identifying the SoftDevice BLE configuration. */
    
    #define DEVICE_NAME                     "Nordic_UART"                               /**< 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 APP_BLE_OBSERVER_PRIO           3                                           /**< Application's BLE observer priority. You shouldn't need to modify this value. */
    
    #define APP_ADV_INTERVAL                64                                          /**< 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(10, UNIT_1_25_MS) //20        /**< Minimum acceptable connection interval (20 ms), Connection interval uses 1.25 ms units. */
    #define MAX_CONN_INTERVAL               MSEC_TO_UNITS(15, UNIT_1_25_MS) //75        /**< 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(200, UNIT_10_MS) //4000      /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
    #define FIRST_CONN_PARAMS_UPDATE_DELAY  APP_TIMER_TICKS(5000)                       /**< 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. */
    
    #define DEAD_BEEF                       0xDEADBEEF                                  /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */
    
    #define UART_TX_BUF_SIZE                256                                         /**< UART TX buffer size. */
    #define UART_RX_BUF_SIZE                256                                         /**< UART RX buffer size. */
    
    #define FDC_ARRAY_NUM 		10
    
    //#define USART_RX_BUF_SIZE 				512		//64
    //#define	USART_RX_DATA_LENGTH			10
    #define SYNC 											1
    #define LED  											0
    #define DATA 											'd'
    #define	DATA_SEC_BYTE							'2'		//0x32
    #define STATUS										's'		//0x73
    #define	TOUCHUAN									't'
    #define IDENTIFY									'i'
    #define STATUS_SEC_BYTE           '1'		//0x31
    #define FIRST_BYTE								'a'		//0xF0//
    
    /*************Transmit Channel*********************/
    #define TX1 1
    #define TX2 2
    #define TX3 3
    #define TX4 4
    
    
    BLE_NUS_DEF(m_nus, NRF_SDH_BLE_TOTAL_LINK_COUNT);                                   /**< BLE NUS service instance. */
    NRF_BLE_GATT_DEF(m_gatt);                                                           /**< GATT module instance. */
    NRF_BLE_QWR_DEF(m_qwr);                                                             /**< Context for the Queued Write module.*/
    BLE_ADVERTISING_DEF(m_advertising);                                                 /**< Advertising module instance. */
    
    BLE_BTN_DEF(m_btn);	
    APP_TIMER_DEF(fdc_timer_flag);
    
    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. */
    static ble_uuid_t m_adv_uuids[]          =                                          /**< Universally unique service identifier. */
    {
        {BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}
    };
    
    ////////////Added for bonding///////////
    // Static passkey
    #define STATIC_PASSKEY    "123456" 
    uint8_t passkey[] = STATIC_PASSKEY; 
    ////////////Added for bonding///////////
    
    // shy - pair
    // 定义状态
    typedef enum {
        STATE_IDLE,                // 空闲状态
        STATE_WAIT_FOR_KEY_FLAG,   // 等待 key_flag
        STATE_AUTH_KEY_REPLY,      // 处理认证密钥回复
        // 其他状态
    } state_t;
    
    state_t current_state = STATE_IDLE;
    bool key_flag = false;
    // shy - pair
    				
    
    // shy - led
    
    uint8_t command = 0x00;
    // shy - led
    
    
    //u8 Digital_counter=0;
    
    //u8 TX_PDO3 = 0;										//sent cyclic synchronous every 100ms (every 2th sync) if a button is pressed. 
    //u8 TX_PDO1 = 0;										//sent on every change in the button status (key pressed or released)
    
    //u8 fdc_read_start = 0;
    //u8 Three_seconds_flag=0;
    //u16 Three_seconds_counter=0;
    
    //u16	fdc_read_val = 0;
    uint16_t fdc_offset = 0;	
    uint8_t fdc_calibrate_flag = 0;
    //u8 fdc_error_flag = FALSE;	//wangwei add 180912
    //u8 fdc_timer_flag = FALSE;
    uint8_t fdc_array_idx = 0;
    uint8_t fdc2114_trigger_flag = 0;
    
    //volatile u8 MCU_start_flag = 0;		
    
    uint32_t led_on_value = 0;									//led on total value
    
    //u8 huart1_rx_flag = FALSE;						//huart1 receive flag
    //u8 hlpuart1_rx_flag = FALSE;
    uint8_t ble_connect_flag = 0;				//BLE connect 1, disconnect 0
    uint8_t data_array[10];
    //u8 hlpuart1_rx_buffer[10];
    //u8 huart1_rx_count = 0;
    //u8 hlpuart1_rx_count = 0;
    //u8 huart_RxBuffer[1], hlpuart1_RxBuffer[1];
    //u8 second_data_flag = 0;
    //u8 second_data_flag2 = 0;
    
    uint8_t BLE_B_MAC[7];
    uint8_t led_rx_buffer[6];
    
    uint8_t hi2c2_device_ready_flag = 0;
    uint8_t hi2c1_device_ready_flag = 0;
    
    
    volatile uint16_t four_key_val = 0;
    uint8_t four_key_detect_flag = 0;
    
    //selfTest_t self_test_info = {0};
    
    uint8_t power_trans_flag = 0;
    
    uint8_t mac_identify_flag = 0;
    uint8_t DMG_status_flag = 0;
    uint8_t fdc_falling_edge = 0;
    uint8_t fdc_rising_edge = 0;
    uint8_t DMG_old_status = 0;
    uint8_t DMG_falling_edge = 0;
    uint8_t DMG_rising_edge = 0;
    ////add wangwei 180911
    uint8_t key_rising_edge = 0;
    uint8_t key_falling_edge = 0;
    uint32_t key_all_value = 0;
    ////end add
    
    uint8_t fdc_counter = 0;
    uint8_t fdc_anti_shake_flag = 0;
    
    //u8 ble_wait_flag = FALSE; //wangwei 180920
    //u16 ble_wait_counter = FALSE; //wangwei 180920
    //u8 ble_wait_flag2 = FALSE; //wangwei 180920
    //u16 ble_wait_counter2 = FALSE; //wangwei 180920
    ////add wangwei 190124
    //u8 ble_A_connect_error_counter = 0;
    //u16 ble_A_connect_error_timer_counter = 1000;
    //u8 ble_A_connect_error_over_time_flag = FALSE;
    //u16 ble_A_connect_error_over_time_counter = 0;
    //u8 ble_B_connect_error_counter = 0;
    //u16 ble_B_connect_error_timer_counter = 1000;
    //u8 ble_B_connect_error_over_time_flag = FALSE;
    //u16 ble_B_connect_error_over_time_counter = 0;
    ////end add
    
    ////u8 dmg_old_status = FALSE;
    
    uint8_t stick_key[2] = {0, 0};	//add wangwei 180824
    
    //extern USART_RxQueue_t huart1_rx_queue_t;
    //extern USART_RxQueue_t hlpuart1_rx_queue_t;
    //extern I2C_HandleTypeDef hi2c1;
    //extern I2C_HandleTypeDef hi2c2;
    extern uint32_t key_past_value;	
    extern uint32_t led_blink_value;
    extern uint8_t led_blink_flag;
    extern uint16_t led_blink_freq;
    extern uint8_t key_press_flag;	
    
    extern uint8_t channel_ref;
    extern uint8_t channel_sample;
    extern uint16_t fdc_threshold_val;
    
    extern uint32_t key_current_value;
    extern uint32_t anti_shake_key_value;
    extern uint8_t	anti_shake_timer_counter;
    extern uint8_t	anti_shake_timer_flag;
    extern uint8_t key_enable_status;
    extern uint8_t pressed_first_key_flag;
    
    
    //u8 BLE_REICEIVE_STATUS[8][11] = 
    //	{
    //		"a1CPCONOKs",
    //		"a1DISCON_s",
    //		"a1SCANKEYs",
    //		"a1CP_NOR_s",
    //		"a1CP_FAR_s",
    //		"a1PAIR_OKs",
    //		"a1DMG_ON_s",
    //		"a1DMG_OFFs"
    //	};
    //																					 
    uint8_t BLE_REICEIVE_TRANSPARENT[12][11] = 
    {
    	"a1WSNxxxxt",
    	"a1WRNxxxxt",
    	"a1WPCxxxxt",
    	"a1READ_SNt",
    	"a1READ_RNt",
    	"a1READ_PCt",
    	"a1GET_VERt", //上电已发 还发了a1GETCVERs?a1GETPVERs?
    	"a1GETCAPxt", //上电已发
    	"a1CALIByxt",	//pcan发送ID=1542,Type=D,DLC=8,Data=43 1 33 0 50 0 0 0,Comment="cap_calibrate"
    	"a1SLFTESTt", 
    	"a1GETCVERs", //新加 上电已发
    	"a1GETPVERs"  //新加 上电已发
    };
    uint8_t BLE_TRANSFER[5][11] = 
    	{ 
    		"a1four_oks",
    		"a1R_CAPyxt",
    		"a1RSNxxxxt",
    		"a1RRNxxxxt",
    		"a1RPCxxxxt"
    	}; 
    	
    const uint8_t SOFTWARE_VERSON[7] = "VA20_A1"; //wangwei 180911
    
    uint8_t self_test_finish_flag = 0;
    
    //shy
    uint8_t reset_flag = 0;
    	
    void usart_send_status(uint8_t *Status_Value, uint8_t T_S);
    //shy
    
    
    
    
    
    /**@brief Function for assert macro callback.
     *
     * @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 analyse
     *          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(DEAD_BEEF, line_num, p_file_name);
    }
    
    
    /**@brief Function for starting advertising.
     */
    static void advertising_start(void) 
    {
        uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
        APP_ERROR_CHECK(err_code);
    }
    /**@brief Function for initializing the timer module.
     */
    static void timers_init(void)
    {
        ret_code_t err_code = app_timer_init();
        APP_ERROR_CHECK(err_code);
    }
    
    /**@brief Function for the GAP initialization.
     *
     * @details This function will set up all the necessary GAP (Generic Access Profile) parameters of
     *          the device. It also sets the permissions and appearance.
     */
    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);
    
        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 handling Queued Write Module errors.
     *
     * @details A pointer to this function will be passed to each service which 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 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)
        {
            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++)
            {
    					data_array[i] = p_evt->params.rx_data.p_data[i];
    //					data_list[i] = data_array[i];
    //					NRF_LOG_INFO("%x",data_array[i]);
    				}
    
        }
    }
    /**@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;
        nrf_ble_qwr_init_t qwr_init = {0};
    
        // Initialize Queued Write Module.
        qwr_init.error_handler = nrf_qwr_error_handler;
    
        err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init);
        APP_ERROR_CHECK(err_code);
    
    		/*------------------以下代码初始化NUS服务-------------*/
        //清零NUS服务初始化结构体
        memset(&nus_init, 0, sizeof(nus_init));
    		//设置NUS事件回调函数
        nus_init.data_handler = nus_data_handler;
    		//初始化NUS服务
        err_code = ble_nus_init(&m_nus, &nus_init);
        APP_ERROR_CHECK(err_code);
    		/*------------------初始化NUS服务-END-----------------*/		
    		
    		/*------------------以下代码初始化BTN服务-------------*/
    		//初始化BTN服务
        err_code = ble_btn_init(&m_btn);
        APP_ERROR_CHECK(err_code);
    		/*------------------初始化BTN服务-END-----------------*/	
    }
    
    
    /**@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 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 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;
    		 NRF_LOG_INFO("on_adv_evt");
        switch (ble_adv_evt)
        {
            case BLE_ADV_EVT_FAST:
    //            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
    //            APP_ERROR_CHECK(err_code);
                break;
            case BLE_ADV_EVT_IDLE:
    						nrf_gpio_cfg_default(BUTTON_1);
    						nrf_gpio_cfg_default(BUTTON_2);
    						nrf_gpio_cfg_default(BUTTON_3);
    						nrf_gpio_cfg_default(BUTTON_4);		
    						nrf_gpio_cfg_default(BUTTON_5);
    						nrf_gpio_cfg_default(BUTTON_6);			
    						nrf_gpio_cfg_default(BUTTON_7);
    						nrf_gpio_cfg_default(BUTTON_8);
    						nrf_gpio_cfg_default(BUTTON_9);
    						nrf_gpio_cfg_default(BUTTON_10);
                sleep_mode_enter();
                break;
            default:
                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");
                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");
    //						// LED1 ON
    //						err_code = bsp_indication_set(BSP_INDICATE_ALERT_OFF);
    //            APP_ERROR_CHECK(err_code);
    //            // LED indication will be changed when advertising starts.
    //            m_conn_handle = BLE_CONN_HANDLE_INVALID;
    //            break;
    					case BLE_GAP_EVT_DISCONNECTED:
    							ble_connect_flag = 0;
    							stick_key[0] = 0;
    							stick_key[1] = 0;
    //							self_test_info.key_val = 0;
    							four_key_val = 0;
    							key_press_flag = 0;
    							key_past_value = 0;	
    							four_key_detect_flag = 0;						
    							led_off_all_except_power();
    							led_on(BlueTooth_Light);
    							power_trans_flag = 0;
    							self_test_finish_flag = 0;
    							key_current_value = 0;
    							anti_shake_key_value = 0;
    							anti_shake_timer_counter = 0;
    							anti_shake_timer_flag = ANTI_SHAKE_TIMER_CLOSE;
    							pressed_first_key_flag = 0;
    
    							NRF_LOG_INFO("Disconnected, reason: 0x%X", p_ble_evt->evt.gap_evt.params.disconnected.reason);
    
    //							// LED1 ON
    //							err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
    //							APP_ERROR_CHECK(err_code);
    
    							// LED indication will be changed when advertising starts.
    							m_conn_handle = BLE_CONN_HANDLE_INVALID;
    							// 根据断开连接的原因执行不同的操作
    							switch (p_ble_evt->evt.gap_evt.params.disconnected.reason)
    							{
    									case BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION:
    											NRF_LOG_INFO("Disconnected by remote user.");
    											// 执行相关操作
    											break;
    									case BLE_HCI_LOCAL_HOST_TERMINATED_CONNECTION:
    											NRF_LOG_INFO("Disconnected by local host.");
    											// 执行相关操作
    											break;
    									case BLE_HCI_CONNECTION_TIMEOUT:
    											NRF_LOG_INFO("Connection timeout.");
    											// 执行相关操作
    											break;
    									// 可以添加其他断开连接原因的处理
    									default:
    											NRF_LOG_INFO("Disconnected with unknown reason.");
    											// 执行相关操作
    											break;
    							}
    							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;
            /////////Added for bonding///////////
            case BLE_GAP_EVT_AUTH_KEY_REQUEST:
    						ble_connect_flag = 0;	
    						four_key_val = 0;
    						four_key_detect_flag = 1;
    						led_on(BlueTooth_Light);
    						led_on(Tracking_Light);
    				
    						current_state = STATE_WAIT_FOR_KEY_FLAG;
                NRF_LOG_INFO("Received BLE_GAP_EVT_AUTH_KEY_REQUEST, waiting for key_flag");
                break;
           /////////Added for bonding///////////
           
             /////////Removed for ebonding process//////////
            /*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;*/
               /////////Removed for bonding process//////////
    
            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 the SoftDevice initialization.
     *
     * @details This function initializes the SoftDevice and the BLE event interrupt.
     */
    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 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 handling events from the GATT library. */
    void gatt_evt_handler(nrf_ble_gatt_t * p_gatt, nrf_ble_gatt_evt_t const * p_evt)
    {
    //	  ret_code_t err_code;
        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);
    		
    		ble_connect_flag = 1;
    		led_off(BlueTooth_Light);
    		if(mac_identify_flag == 1)
    		{
    			usart_send_status(BLE_B_MAC, IDENTIFY);
    			mac_identify_flag = 0;
    		}
    		
    //		// LED1 OFF
    //		err_code = bsp_indication_set(BSP_INDICATE_ALERT_OFF);
    //		APP_ERROR_CHECK(err_code);
    		
    		
    
    
    
    //				//add wangwei 190124
    //				ble_A_connect_error_timer_counter = 1000;
    //				ble_A_connect_error_counter = 0;
    //				ble_A_connect_error_over_time_counter = 0;
    //				ble_A_connect_error_over_time_flag = FALSE;
    //				//end add
    
    }
    
    
    /**@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 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(&m_advertising);
                    if (err_code != NRF_ERROR_INVALID_STATE)
                    {
                        APP_ERROR_CHECK(err_code);
                    }
                }
                break;
    
            default:
                break;
        }
    }
    
    
    /**@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_arr[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_arr[index]));
                index++;
    
                if ((data_arr[index - 1] == '\n') ||
                    (data_arr[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_arr, index);
    
                        do
                        {
                            uint16_t length = (uint16_t)index;
                            err_code = ble_nus_data_send(&m_nus, data_arr, &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   = true,
    #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)
    {
        uint32_t               err_code;
        ble_advertising_init_t init;
    		int8_t tx_power_level = 8;
    
        memset(&init, 0, sizeof(init));
    
        init.advdata.name_type          = BLE_ADVDATA_FULL_NAME;
        init.advdata.include_appearance = false;
        init.advdata.flags              = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;
    
        init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
        init.srdata.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);
    		
    		err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_advertising.adv_handle, tx_power_level);
    		APP_ERROR_CHECK(err_code);
        if (err_code == NRF_SUCCESS)
        {
            // 发射功率设置成功
            NRF_LOG_INFO("Transmit power set successfully.");
        }
        else
        {
            // 发射功率设置失败
            NRF_LOG_INFO("Failed to set transmit power. Error code: %d\n", 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_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
    		uint32_t err_code = bsp_init(BSP_INIT_LEDS, NULL);
        APP_ERROR_CHECK(err_code);
    	
    		nrf_gpio_pin_clear(LED_2);
    		
    //    err_code = bsp_btn_ble_init(NULL, &startup_event);
    //    APP_ERROR_CHECK(err_code);
    
    //    *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
    }
    
    
    ///////////Added for bonding/////////////
    /**@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_flash_clean(p_evt);
    
        switch (p_evt->evt_id)
        {
            case PM_EVT_PEERS_DELETE_SUCCEEDED:
                advertising_start();
                break;
    
            default:
                break;
        }
    }
    ///////////Added for bonding////////////
    
    
    /**@brief Function for the Peer Manager initialization.
     */
    static void peer_manager_init(void)
    {
        ret_code_t err_code;
    
        err_code = pm_init();
        APP_ERROR_CHECK(err_code);
    
        err_code = pm_register(pm_evt_handler);
        APP_ERROR_CHECK(err_code);
    
        ble_gap_sec_params_t sec_param;
    
        memset(&sec_param, 0, sizeof(ble_gap_sec_params_t));
    
        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);
    }
    
    
    /**@brief Function for initializing the nrf log module.
     */
    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 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 If there is no pending log operation, then sleep until next the next event occurs.
     */
    static void idle_state_handle(void)
    {
        if (NRF_LOG_PROCESS() == false)
        {
            nrf_pwr_mgmt_run();
        }
    }
    
    
    uint8_t usart_send_packet(uint8_t second_byte, uint16_t Key_Value, uint8_t DMG_status, uint8_t Led_Value, uint8_t Tx_counter, uint8_t Tx_num, uint8_t d_s) 
    {
    		uint8_t key_value[10]={0};
      	uint8_t i=0;
      	uint8_t len=5,j=4;
      	uint16_t crc=0;
      	uint16_t c=0x0107;				       //1 0000 0111 //x^8+x^2+x+1
      	c=c<<7; 						   //1000 0011 1000 0000
    		key_value[0]=FIRST_BYTE;
    		key_value[1]=second_byte;
      	key_value[2] = (uint8_t)((Key_Value >> 8) & 0xFF);
      	key_value[3] = (uint8_t)(Key_Value & 0xFF);
    		key_value[4] = DMG_status;
    		key_value[5]=Led_Value;
      	key_value[6]=Tx_counter;
      	crc=(uint16_t)((key_value[2]<<8)&0xFF00) | key_value[3];
    
      	while(len--)
      	{
      		for(i=0;i<8;i++)
    		{
    			if((crc&0x8000)!=0)
    				crc=crc^c;
    			if(i<7)
    				crc=(crc<<1)&0xFFFE;
    		}
    		if(j<7)
    			crc=((crc<<1)&0xFFFE) | key_value[j++];
    		else
    			crc=((crc<<1)&0xFFFE) | 0x00;
      	}
    //  	key_value[7]=~((uint8_t)(crc>>8));‘
    	key_value[7]=0;
    		key_value[8]=Tx_num;
    		key_value[9]=d_s;
    
    		ble_btn_data_send(&m_btn, key_value, 10, m_conn_handle);
    //		NRF_LOG_INFO("ble_btn_data_send(&m_btn, key_value, 10, m_conn_handle);=%x", ble_btn_data_send(&m_btn, key_value, 10, m_conn_handle));
    		return 0; 
    }
    
    
    void usart_send_status(uint8_t *Status_Value, uint8_t T_S)
    {
    		uint8_t key_value[10]={0};
    		
    		key_value[0]=FIRST_BYTE;
    		key_value[1]=STATUS_SEC_BYTE;
      	key_value[2]=*Status_Value;
    		Status_Value++;
      	key_value[3]=*Status_Value;
    		Status_Value++;
      	key_value[4]=*Status_Value;
    		Status_Value++;
      	key_value[5]=*Status_Value;
    		Status_Value++;
    		key_value[6]=*Status_Value;
    		Status_Value++;
      	key_value[7]=*Status_Value;
    		Status_Value++;
      	key_value[8]=*Status_Value;
    
    		key_value[9]=T_S;
      
    		/*send key value*/
    		ble_btn_data_send(&m_btn, key_value, 10, m_conn_handle);
    }
    
    
    void process_state() {
        switch (current_state) {
            case STATE_WAIT_FOR_KEY_FLAG:
                if (key_flag) {
                    current_state = STATE_AUTH_KEY_REPLY;
                }
                break;
    
            case STATE_AUTH_KEY_REPLY:
                sd_ble_gap_auth_key_reply(0x00, BLE_GAP_AUTH_KEY_TYPE_PASSKEY, passkey);
                NRF_LOG_INFO("sd_ble_gap_auth_key_reply");
                // 执行完后回到空闲状态或其他状态
                current_state = STATE_IDLE;
                break;
    
            case STATE_IDLE:
                // 空闲状态处理其他任务
                break;
    
            // 其他状态处理
        }
    }
    
    
    
    void GPIO_Init()
    {
    //		nrf_gpio_cfg_input(POWER_PIN, NRF_GPIO_PIN_PULLUP);
    //		nrf_gpio_cfg_input(DMG, NRF_GPIO_PIN_PULLUP);
    }
    
    /**@brief Application main function.
     */
    int main(void)
    {
        bool erase_bonds;
    		uint8_t four_key_read_value;
    	
        // Initialize.
        uart_init();
        log_init();
        timers_init();
    	// 初始化外设
    		GPIOTE_Init();
    		GPIO_Init();
    		
    		// 初始化按键
    		BTN_Init();	 
    		LED_Init();
        buttons_leds_init(&erase_bonds);	
    		nrf_gpio_cfg_output(11);
    		nrf_delay_ms(10);
    		twi_init();
    		fdc2114_init();
        power_management_init();
        ble_stack_init();
        gap_params_init();
        gatt_init();
        services_init();
    		
        advertising_init();
        conn_params_init();
    //		flash_init();
        
        /////////Added for bonding//////////
        peer_manager_init();
        /////////Added for bonding//////////
    	
        // Start execution.
        printf("\r\nUART started.\r\n");
        NRF_LOG_INFO("Debug logging for UART over RTT started.");
        advertising_start();
    
    
    
        // Enter main loop.
        for (;;)
        {
            idle_state_handle();
    				process_state();
    				if(four_key_detect_flag == 1)
    				{
    					four_key_read_value = read_four_key();
    					NRF_LOG_INFO("four_key_read_value = %d",four_key_read_value);
    					if(four_key_read_value != 0)
    					{
    								led_blink(Tracking_Light, 300);
    					}
    					else
    					{
    								led_blink(0, 0);
    								led_on(Tracking_Light);
    					}
    					four_key_val = four_key_val | four_key_read_value;
    					if(four_key_val == 0x0F)
    					{
    						NRF_LOG_INFO("four_key_val == 0x0F");
    						key_flag=1;
    		//						memcpy(Data_buffer, BLE_TRANSFER[0]+2, 7);
    //								usart_send_status(Data_buffer, STATUS);
    								led_off(Tracking_Light);				
    						four_key_detect_flag = 0;
    								led_blink_flag = 0;
    								led_blink_value = 0;
    								led_blink_freq = 50;
    								mac_identify_flag = 1;
    					}
    				}
    			
        }
    }
    
    
    /**
     * @}
     */
    

  • Hello,

    I call pm_evt_handler() on the peripheral side. 

    But it doesn't respond.

    static void pm_evt_handler(pm_evt_t const * p_evt)
    {
        pm_handler_on_pm_evt(p_evt);
        pm_handler_flash_clean(p_evt);
    
        switch (p_evt->evt_id)
        {
            case PM_EVT_PEERS_DELETE_SUCCEEDED:
    						NRF_LOG_INFO("PM_EVT_PEERS_DELETE_SUCCEEDED");
    //						ret_code_t err_code = sd_ble_gap_disconnect(0x0000, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
                advertising_start();
                break;
    				
    				case PM_EVT_PEERS_DELETE_FAILED:
    						NRF_LOG_INFO("PM_EVT_PEERS_DELETE_FAILED");
    						break;
    
            default:
                break;
        }
    }
    ///////////Added for bonding////////////

    Or do you mean i need to call the delete_bonds() on the peripheral side?

    I find before deleting the bonds, I should disable scanning and advertising.

    How can I implement this function?

  • Hi,

    If this is now on the peripheral, and you are currently advertising, you can disable advertising by calling sd_ble_gap_adv_stop() (you must pass the advertising handle to the call).

  • Hello,

    I want to konw the following questions about deleting bonding information.

    1. whether to delete bonds both on the central and on the peripheral, that is, whether both sides need to call the void delete_bonds(void).
    2. When or Where do I call the delete_bonds()? Because I find before deleting the bonds, I should disable scanning and advertising.
    3. I find many examples about deleting the bonding information ,but they all look like this.
      /**@brief Function for starting advertising.
       */
      static void advertising_start(bool erase_bonds)
      {
          if (erase_bonds == true)
          {
              delete_bonds();
              // Advertising is started by PM_EVT_PEERS_DELETE_SUCCEEDED event.
          }
          else
          {
              ret_code_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
              APP_ERROR_CHECK(err_code);
          }
      }

      How do I use something like this?

    Thank you.

  • Hi,

    Mark said:
    whether to delete bonds both on the central and on the peripheral, that is, whether both sides need to call the void delete_bonds(void).

    Yes. If you delete a bond only on one side, it will not be deleted on the other. And furthermore, any subsequent pariting attempt will by default fail. You can however allow repairing so that pairing will be allowed even if a bond with the device allready exist, see this post for details.

    Mark said:
    When or Where do I call the delete_bonds()? Because I find before deleting the bonds, I should disable scanning and advertising.

    You should only delete bonds when not connecting or connectable. In other words, disconnect any connections and stop advertising and/or scanning. This is indicated in the API documentation for pm_peers_delete().

    Mark said:
    How do I use something like this?

    This is used in the example applications to delete bonds by holding down a button and pressing reset. If the button is pressed, bonds are deleted in the start of the applicaiton, before starting to advertise. This makes sense in the example applications but how and when you should delete bonds in your application depends on your specific use case and what makes sense in your product.

  • Hello,

    I find the examples. ...\examples\ble_central\ble_app_hrs_c and ...\\examples\ble_peripheral\ble_app_hrs

    The examples include the following contents.

    I want to know how do I use these to delete the bonding information.

    Thank you.

Reply Children
  • Hi,

    This code is not realted to erasing the bonds itself. But these variables are set based on a button press at power on.

    If  we look at ble_app_hrs, you can see that in buttons_leds_init() p_erase_bonds which point to erase_bonds (as the pointer is provided as a parameter when then function is called), is set to 1 if the startup event is BSP_EVENT_CLEAR_BONDING_DATA). And this comes from the BSP library which is used on the DKs. This complicates thigs a bit so I would not use that in your code (it mostly makes sense on the DKs), but that it all this part does.

    Moving on, erase_bonds (which is not set based on if a button was pressed during reset or not), is passed to advertising_start() which is a function defined in this example. And if you look at the implementation there you can see that if erase_bonds is set, advertisign is not started, but instead the bonds are deleted. And in this case advertising is started in the handling of the PM_EVT_PEERS_DELETE_SUCCEEDED event.

  • Hello,

    Now I want to know how to delete the bonding information on the central and the peripheral side when

    I recieve the strings "A5". At this point, they are connected.

    I've tried this many times, but it's hard for me to disconnect and disable scanning and advertising before using delete_bonds().

    I would really appreciate it if you could provide me with the complete code, because deleting the bonding information has been bothering me for so long.

    Thank you.

  • Hi,

    It is difficult to provide the complete code as it needs to be integrated in yoru applicatioon. However, you do not need to do many things:

    1. If you only have one connection, stop that ocnnection with a call to sd_ble_gap_disconnect(). There you pass the connection handle and a disconnect reason. That would typically be BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION.
    2. As a peripheral, stop advertising by calling sd_ble_gap_adv_stop() with the advertising as parameter (you got that when you configured the advertiser). As a central, stop scanning with sd_ble_gap_scan_stop(). This does not take any parameters.
    3. Call pm_peers_delete() to delete the bonds.
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