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How to Implement Long range in BLE central peripheral example(relay)?

Dear Nordic,

what are the changes to achieve long range in Relay example ?

I need some help to achieve this 

  • No i have no Log information i testing using  dongle (scanner)LED blinking if its capture advertising. i totally confused why custom board act like this.

  • You will need some kind of Segger J-Link if you want to log what is happening on the 52840 dongle. Do you have any logging information for the custom board?

  • No i just debugging the boardusing keil .

    I share my files can you check that files?

    ble_advertising.c:-

    changes only in (line 594) phy to coded (ble_advertising_sart)


    p_advertising->adv_modes_config.ble_adv_primary_phy =BLE_GAP_PHY_CODED;

    Line 333 (set_adv_mode_fast)

    p_advertising->adv_params.properties.type = BLE_GAP_ADV_TYPE_EXTENDED_CONNECTABLE_NONSCANNABLE_UNDIRECTED;

    /**
     * Copyright (c) 2015 - 2018, 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.
     * 
     */
    #include  "sdk_common.h"
    #if NRF_MODULE_ENABLED(BLE_ADVERTISING)
    #include "ble_advdata.h"
    #include "ble_advertising.h"
    #include "nrf_soc.h"
    #include "nrf_log.h"
    #include "nrf_fstorage.h"
    #include "sdk_errors.h"
    #include "nrf_sdh_ble.h"
    #include "nrf_sdh_soc.h"
    
    #define BLE_ADV_MODES (5) /**< Total number of possible advertising modes. */
    
    
    /**@brief Function for checking if the whitelist is in use.
     *
     * @param[in] p_advertising Advertising module instance.
     */
    static bool whitelist_has_entries(ble_advertising_t * const p_advertising)
    {
        return p_advertising->whitelist_in_use;
    }
    
    
    /**@brief Function for checking if an address is valid.
     *
     * @param[in] p_addr Pointer to a bluetooth address.
     */
    static bool addr_is_valid(uint8_t const * const p_addr)
    {
        for (uint32_t i = 0; i < BLE_GAP_ADDR_LEN; i++)
        {
            if (p_addr[i] != 0)
            {
                return true;
            }
        }
        return false;
    }
    
    
    /**@brief Function for checking the next advertising mode.
     *
     * @param[in] adv_mode Current advertising mode.
     */
    static ble_adv_mode_t adv_mode_next_get(ble_adv_mode_t adv_mode)
    {
        return (ble_adv_mode_t)((adv_mode + 1) % BLE_ADV_MODES);
    }
    
    
    /**@brief Function for handling the Connected event.
     *
     * @param[in] p_ble_evt Event received from the BLE stack.
     */
    static void on_connected(ble_advertising_t * const p_advertising, ble_evt_t const * p_ble_evt)
    {
        if (p_ble_evt->evt.gap_evt.params.connected.role == BLE_GAP_ROLE_PERIPH)
        {
            p_advertising->current_slave_link_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
        }
    }
    
    
    /**@brief Function for handling the Disconnected event.
     *
     * @param[in] p_advertising Advertising module instance.
     * @param[in] p_ble_evt Event received from the BLE stack.
     */
    static void on_disconnected(ble_advertising_t * const p_advertising, ble_evt_t const * p_ble_evt)
    {
        uint32_t ret;
    
        p_advertising->whitelist_temporarily_disabled = false;
    
        if (p_ble_evt->evt.gap_evt.conn_handle == p_advertising->current_slave_link_conn_handle &&
            p_advertising->adv_modes_config.ble_adv_on_disconnect_disabled == false)
        {
           ret = ble_advertising_start(p_advertising, BLE_ADV_MODE_DIRECTED_HIGH_DUTY);
           if ((ret != NRF_SUCCESS) && (p_advertising->error_handler != NULL))
           {
               p_advertising->error_handler(ret);
           }
        }
    }
    
    
    /**@brief Function for handling the Timeout event.
     *
     * @param[in] p_advertising Advertising module instance.
     * @param[in] p_ble_evt Event received from the BLE stack.
     */
    static void on_terminated(ble_advertising_t * const p_advertising, ble_evt_t const * p_ble_evt)
    {
        ret_code_t ret;
    
        if (p_ble_evt->header.evt_id != BLE_GAP_EVT_ADV_SET_TERMINATED)
        {
            // Nothing to do.
            return;
        }
    
        if (  p_ble_evt->evt.gap_evt.params.adv_set_terminated.reason == BLE_GAP_EVT_ADV_SET_TERMINATED_REASON_TIMEOUT
            ||p_ble_evt->evt.gap_evt.params.adv_set_terminated.reason == BLE_GAP_EVT_ADV_SET_TERMINATED_REASON_LIMIT_REACHED)
        {
            // Start advertising in the next mode.
            ret = ble_advertising_start(p_advertising, adv_mode_next_get(p_advertising->adv_mode_current));
    
            if ((ret != NRF_SUCCESS) && (p_advertising->error_handler != NULL))
            {
                p_advertising->error_handler(ret);
            }
        }
    }
    
    
    /** @brief Function to determine if a flash write operation in in progress.
     *
     * @return true if a flash operation is in progress, false if not.
     */
    static bool flash_access_in_progress()
    {
        return nrf_fstorage_is_busy(NULL);
    }
    
    
    /**@brief Get the next available advertising mode.
     *
     * @param[in] p_advertising Advertising module instance.
     * @param[in] adv_mode Requested advertising mode.
     *
     * @returns adv_mode if possible, or the best available mode if not.
     */
    static ble_adv_mode_t adv_mode_next_avail_get(ble_advertising_t * const p_advertising,
                                                  ble_adv_mode_t            adv_mode)
    {
        bool peer_addr_is_valid = addr_is_valid(p_advertising->peer_address.addr);
    
        // If a mode is disabled, continue to the next mode.
    
        switch (adv_mode)
        {
            case BLE_ADV_MODE_DIRECTED_HIGH_DUTY:
                if (   (p_advertising->adv_modes_config.ble_adv_directed_high_duty_enabled)
                    && (!p_advertising->adv_modes_config.ble_adv_extended_enabled)
                    && (peer_addr_is_valid))
                {
                    return BLE_ADV_MODE_DIRECTED_HIGH_DUTY;
                }
                // Fallthrough.
    
            case BLE_ADV_MODE_DIRECTED:
                if ((p_advertising->adv_modes_config.ble_adv_directed_enabled) && peer_addr_is_valid)
                {
                    return BLE_ADV_MODE_DIRECTED;
                }
                // Fallthrough.
    
            case BLE_ADV_MODE_FAST:
                if (p_advertising->adv_modes_config.ble_adv_fast_enabled)
                {
                    return BLE_ADV_MODE_FAST;
                }
                // Fallthrough.
    
            case BLE_ADV_MODE_SLOW:
                if (p_advertising->adv_modes_config.ble_adv_slow_enabled)
                {
                    return BLE_ADV_MODE_SLOW;
                }
                // Fallthrough.
    
            default:
                return BLE_ADV_MODE_IDLE;
        }
    }
    
    
    /**@brief Function for starting high duty directed advertising.
     *
     * @param[in]  p_advertising Advertising instance.
     * @param[out] p_adv_params Advertising parameters.
     *
     * @return NRF_SUCCESS
     */
    static ret_code_t set_adv_mode_directed_high_duty(ble_advertising_t * const p_advertising,
                                                      ble_gap_adv_params_t    * p_adv_params)
    {
        p_advertising->adv_evt    = BLE_ADV_EVT_DIRECTED_HIGH_DUTY;
        p_advertising->p_adv_data = NULL;
    
        p_adv_params->p_peer_addr     = &(p_advertising->peer_address);
        p_adv_params->interval        = 0;
        p_adv_params->properties.type = BLE_GAP_ADV_TYPE_CONNECTABLE_NONSCANNABLE_DIRECTED_HIGH_DUTY_CYCLE;
        p_adv_params->duration        = BLE_GAP_ADV_TIMEOUT_HIGH_DUTY_MAX;
    
        return NRF_SUCCESS;
    }
    
    
    /**@brief Function for starting directed slow advertising.
     *
     * @param[in]  p_advertising Advertising module instance.
     * @param[out] p_adv_params Advertising parameters.
     *
     * @return NRF_SUCCESS
     */
    static ret_code_t set_adv_mode_directed(ble_advertising_t * const p_advertising,
                                            ble_gap_adv_params_t    * p_adv_params)
    {
        p_advertising->adv_evt = BLE_ADV_EVT_DIRECTED;
    #if !defined (S112)
        if (p_advertising->adv_modes_config.ble_adv_extended_enabled)
        {
            p_adv_params->properties.type = BLE_GAP_ADV_TYPE_EXTENDED_CONNECTABLE_NONSCANNABLE_DIRECTED;
        }
        else
        {
    #endif // !defined (S112)
            p_adv_params->properties.type = BLE_GAP_ADV_TYPE_CONNECTABLE_NONSCANNABLE_DIRECTED;
    #if !defined (S112)
        }
    #endif // !defined (S112)
        p_adv_params->duration = p_advertising->adv_modes_config.ble_adv_directed_timeout;
    
        p_advertising->p_adv_data = NULL;
    
        p_adv_params->p_peer_addr = &p_advertising->peer_address;
        p_adv_params->interval    = p_advertising->adv_modes_config.ble_adv_directed_interval;
    
        return NRF_SUCCESS;
    }
    
    
    /**@brief Function for indicating whether to use whitelist for advertising.
     *
     * @param[in]  p_advertising Advertising module instance.
     *
     * @return Whether to use whitelist.
     */
    static bool use_whitelist(ble_advertising_t * const p_advertising)
    {
        return((p_advertising->adv_modes_config.ble_adv_whitelist_enabled) &&
               (!p_advertising->whitelist_temporarily_disabled) &&
               (whitelist_has_entries(p_advertising)));
    }
    
    
    /**@brief Function for setting new advertising flags in the advertising parameters.
     *
     * @param[in]  p_advertising Advertising module instance.
     * @param[in]  flags         New flags.
     *
     * @return Any error from @ref sd_ble_gap_adv_set_configure.
     */
    static ret_code_t flags_set(ble_advertising_t * const p_advertising, uint8_t flags)
    {
        uint8_t * p_flags = ble_advdata_parse(p_advertising->adv_data.adv_data.p_data,
                                              p_advertising->adv_data.adv_data.len,
                                              BLE_GAP_AD_TYPE_FLAGS);
    
        if (p_flags != NULL)
        {
            *p_flags = flags;
        }
    
        return sd_ble_gap_adv_set_configure(&p_advertising->adv_handle, &p_advertising->adv_data, &p_advertising->adv_params);
    }
    uint8_t phy_found;
    
    /**@brief Function for starting fast advertising.
     *
     * @param[in]  p_advertising Advertising module instance.
     * @param[out] p_adv_params Advertising parameters.
     *
     * @return NRF_SUCCESS or an error from @ref flags_set().
     */
    static ret_code_t set_adv_mode_fast(ble_advertising_t * const p_advertising,
                                        ble_gap_adv_params_t    * p_adv_params)
    {
        ret_code_t ret;
    
        p_adv_params->interval = p_advertising->adv_modes_config.ble_adv_fast_interval;
        p_adv_params->duration = p_advertising->adv_modes_config.ble_adv_fast_timeout;
    
    #if !defined (S112)
        if (p_advertising->adv_modes_config.ble_adv_extended_enabled)
        {
            p_advertising->adv_params.properties.type = BLE_GAP_ADV_TYPE_EXTENDED_CONNECTABLE_NONSCANNABLE_UNDIRECTED;
        }
        else
        {
    #endif // !defined (S112)
            p_advertising->adv_params.properties.type = BLE_GAP_ADV_TYPE_EXTENDED_CONNECTABLE_NONSCANNABLE_UNDIRECTED;
    			phy_found = p_advertising->adv_params.primary_phy;
    #if !defined (S112)
        }
    #endif // !defined (S112)
     
        if (use_whitelist(p_advertising))
        {
            p_adv_params->filter_policy = BLE_GAP_ADV_FP_FILTER_CONNREQ;
    
            // Set correct flags.
            ret = flags_set(p_advertising, BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED);
            VERIFY_SUCCESS(ret);
    
            p_advertising->adv_evt = BLE_ADV_EVT_FAST_WHITELIST;
        }
        else
        {
            p_advertising->adv_evt = BLE_ADV_EVT_FAST;
        }
        p_advertising->p_adv_data = &(p_advertising->adv_data);
        return NRF_SUCCESS;
    }
    
    
    /**@brief Function for starting slow advertising.
     *
     * @param[in]  p_advertising Advertising module instance.
     * @param[out] p_adv_params Advertising parameters.
     *
     * @return NRF_SUCCESS or an error from @ref flags_set().
     */
    static ret_code_t set_adv_mode_slow(ble_advertising_t * const p_advertising,
                                        ble_gap_adv_params_t    * p_adv_params)
    {
        ret_code_t ret;
    
        p_adv_params->interval = p_advertising->adv_modes_config.ble_adv_slow_interval;
        p_adv_params->duration = p_advertising->adv_modes_config.ble_adv_slow_timeout;
    
    #if !defined (S112)
        if (p_advertising->adv_modes_config.ble_adv_extended_enabled)
        {
            p_advertising->adv_params.properties.type = BLE_GAP_ADV_TYPE_EXTENDED_CONNECTABLE_NONSCANNABLE_UNDIRECTED;
        }
        else
        {
    #endif // !defined (S112)
            p_advertising->adv_params.properties.type = BLE_GAP_ADV_TYPE_CONNECTABLE_SCANNABLE_UNDIRECTED;
    #if !defined (S112)
        }
    #endif // !defined (S112)
    
        if (use_whitelist(p_advertising))
        {
            p_adv_params->filter_policy = BLE_GAP_ADV_FP_FILTER_CONNREQ;
    
            // Set correct flags.
            ret = flags_set(p_advertising, BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED);
            VERIFY_SUCCESS(ret);
    
            p_advertising->adv_evt = BLE_ADV_EVT_SLOW_WHITELIST;
        }
        else
        {
            p_advertising->adv_evt = BLE_ADV_EVT_SLOW;
        }
        p_advertising->p_adv_data = &(p_advertising->adv_data);
        return NRF_SUCCESS;
    }
    
    
    /**@brief Function for checking if an advertising module configuration is legal.
     *
     * @details Advertising module can not be initialized if high duty directed advertising is used
     *          together with extended advertising.
     *
     * @param[in] p_config Pointer to the configuration.
     *
     * @return True  If the configuration is valid.
     * @return False If the configuration is invalid.
     */
    static bool config_is_valid(ble_adv_modes_config_t const * const p_config)
    {
        if ((p_config->ble_adv_directed_high_duty_enabled == true) &&
            (p_config->ble_adv_extended_enabled == true))
        {
            return false;
        }
    #if !defined (S140)
        else if ( p_config->ble_adv_primary_phy == BLE_GAP_PHY_CODED ||
                  p_config->ble_adv_secondary_phy == BLE_GAP_PHY_CODED)
        {
            return false;
        }
    #endif // !defined (S140)
        else
        {
            return true;
        }
    }
    
    
    void ble_advertising_conn_cfg_tag_set(ble_advertising_t * const p_advertising,
                                          uint8_t                   ble_cfg_tag)
    {
        p_advertising->conn_cfg_tag = ble_cfg_tag;
    }
    
    
    uint32_t ble_advertising_init(ble_advertising_t            * const p_advertising,
                                  ble_advertising_init_t const * const p_init)
    {
        uint32_t ret;
        if ((p_init == NULL) || (p_advertising == NULL))
        {
            return NRF_ERROR_NULL;
        }
        if (!config_is_valid(&p_init->config))
        {
            return NRF_ERROR_INVALID_PARAM;
        }
    
        p_advertising->adv_mode_current               = BLE_ADV_MODE_FAST;
        p_advertising->adv_modes_config               = p_init->config;
        p_advertising->conn_cfg_tag                   = BLE_CONN_CFG_TAG_DEFAULT;
        p_advertising->evt_handler                    = p_init->evt_handler;
        p_advertising->error_handler                  = p_init->error_handler;
        p_advertising->current_slave_link_conn_handle = BLE_CONN_HANDLE_INVALID;
        p_advertising->p_adv_data                     = &p_advertising->adv_data;
    
        memset(&p_advertising->peer_address, 0, sizeof(p_advertising->peer_address));
    
        // Copy advertising data.
        if (!p_advertising->initialized)
        {
            p_advertising->adv_handle = BLE_GAP_ADV_SET_HANDLE_NOT_SET;
        }
        p_advertising->adv_data.adv_data.p_data = p_advertising->enc_advdata;
        p_advertising->adv_data.adv_data.len    = BLE_GAP_ADV_SET_DATA_SIZE_MAX;
    
        ret = ble_advdata_encode(&p_init->advdata, p_advertising->enc_advdata, &p_advertising->adv_data.adv_data.len);
        VERIFY_SUCCESS(ret);
    
        if (&p_init->srdata != NULL)
        {
            p_advertising->adv_data.scan_rsp_data.p_data = p_advertising->enc_scan_rsp_data;
            p_advertising->adv_data.scan_rsp_data.len    = BLE_GAP_ADV_SET_DATA_SIZE_MAX;
    
            ret = ble_advdata_encode(&p_init->srdata,
                                      p_advertising->adv_data.scan_rsp_data.p_data,
                                     &p_advertising->adv_data.scan_rsp_data.len);
            VERIFY_SUCCESS(ret);
        }
        else
        {
            p_advertising->adv_data.scan_rsp_data.p_data = NULL;
            p_advertising->adv_data.scan_rsp_data.len    = 0;
        }
    
        // Configure a initial advertising configuration. The advertising data and and advertising
        // parameters will be changed later when we call @ref ble_advertising_start, but must be set
        // to legal values here to define an advertising handle.
        p_advertising->adv_params.primary_phy     = BLE_GAP_PHY_CODED;
        p_advertising->adv_params.duration        = p_advertising->adv_modes_config.ble_adv_fast_timeout;
        p_advertising->adv_params.properties.type = BLE_GAP_ADV_TYPE_EXTENDED_NONCONNECTABLE_SCANNABLE_UNDIRECTED;
        p_advertising->adv_params.p_peer_addr     = NULL;
        p_advertising->adv_params.filter_policy   = BLE_GAP_ADV_FP_ANY;
        p_advertising->adv_params.interval        = p_advertising->adv_modes_config.ble_adv_fast_interval;
    
        ret = sd_ble_gap_adv_set_configure(&p_advertising->adv_handle, NULL, &p_advertising->adv_params);
        VERIFY_SUCCESS(ret);
    
        p_advertising->initialized = true;
        return ret;
    }
    
    uint8_t phy_value_;
    /**@brief Function for checking that a phy define value matches one of the valid phys from the SD.
     *
     * @param[in]  PHY to be validated.
     *
     * @retval true  If the PHY value is valid (1mbit, 2mbit, coded).
     * @retval false If the PHY value is invalid.
     */
    static bool phy_is_valid(uint32_t const * const p_phy)
    {
        if ((*p_phy) == BLE_GAP_PHY_1MBPS ||
            (*p_phy) == BLE_GAP_PHY_2MBPS
    #if defined (S140)
         || (*p_phy) == BLE_GAP_PHY_CODED
    #endif // !defined (S140)
            )
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    
    
    uint32_t ble_advertising_start(ble_advertising_t * const p_advertising,
                                   ble_adv_mode_t            advertising_mode)
    {
        uint32_t ret;
    
        if (p_advertising->initialized == false)
        {
            return NRF_ERROR_INVALID_STATE;
        }
    
        p_advertising->adv_mode_current = advertising_mode;
    
        // Delay starting advertising until the flash operations are complete.
        if (flash_access_in_progress())
        {
            p_advertising->advertising_start_pending = true;
            return NRF_SUCCESS;
        }
    
       memset(&p_advertising->peer_address, 0, sizeof(p_advertising->peer_address));
    
        if (  ((p_advertising->adv_modes_config.ble_adv_directed_high_duty_enabled) && (p_advertising->adv_mode_current == BLE_ADV_MODE_DIRECTED_HIGH_DUTY))
            ||((p_advertising->adv_modes_config.ble_adv_directed_enabled)           && (p_advertising->adv_mode_current == BLE_ADV_MODE_DIRECTED_HIGH_DUTY))
            ||((p_advertising->adv_modes_config.ble_adv_directed_enabled)           && (p_advertising->adv_mode_current == BLE_ADV_MODE_DIRECTED))
           )
        {
            if (p_advertising->evt_handler != NULL)
            {
                p_advertising->peer_addr_reply_expected = true;
                p_advertising->evt_handler(BLE_ADV_EVT_PEER_ADDR_REQUEST);
            }
            else
            {
                p_advertising->peer_addr_reply_expected = false;
            }
        }
    
        p_advertising->adv_mode_current = adv_mode_next_avail_get(p_advertising, advertising_mode);
    
        // Fetch the whitelist.
        if ((p_advertising->evt_handler != NULL) &&
            (p_advertising->adv_mode_current == BLE_ADV_MODE_FAST || p_advertising->adv_mode_current == BLE_ADV_MODE_SLOW) &&
            (p_advertising->adv_modes_config.ble_adv_whitelist_enabled) &&
            (!p_advertising->whitelist_temporarily_disabled))
        {
            p_advertising->whitelist_in_use         = false;
            p_advertising->whitelist_reply_expected = true;
            p_advertising->evt_handler(BLE_ADV_EVT_WHITELIST_REQUEST);
        }
        else
        {
            p_advertising->whitelist_reply_expected = false;
        }
    
        // Initialize advertising parameters with default values.
        memset(&p_advertising->adv_params, 0, sizeof(p_advertising->adv_params));
    
        p_advertising->adv_params.properties.type = BLE_GAP_ADV_TYPE_CONNECTABLE_SCANNABLE_UNDIRECTED;
    		p_advertising->adv_modes_config.ble_adv_primary_phy =BLE_GAP_PHY_CODED;
        // Use 1MBIT as primary phy if no phy was selected.
        if (phy_is_valid(&p_advertising->adv_modes_config.ble_adv_primary_phy))
        {
            p_advertising->adv_params.primary_phy = p_advertising->adv_modes_config.ble_adv_primary_phy;
        }
        else
        {
            p_advertising->adv_params.primary_phy = BLE_GAP_PHY_1MBPS;
        }
    
        if (p_advertising->adv_modes_config.ble_adv_extended_enabled)
        {
            // Use 1MBIT as secondary phy if no phy was selected.
            if (phy_is_valid(&p_advertising->adv_modes_config.ble_adv_primary_phy))
            {
                p_advertising->adv_params.secondary_phy = p_advertising->adv_modes_config.ble_adv_secondary_phy;
            }
            else
            {
                p_advertising->adv_params.secondary_phy = BLE_GAP_PHY_1MBPS;
            }
        }
        p_advertising->adv_params.filter_policy = BLE_GAP_ADV_FP_ANY;
    
        // Set advertising parameters and events according to selected advertising mode.
        switch (p_advertising->adv_mode_current)
        {
            case BLE_ADV_MODE_DIRECTED_HIGH_DUTY:
                ret = set_adv_mode_directed_high_duty(p_advertising, &p_advertising->adv_params);
                break;
    
            case BLE_ADV_MODE_DIRECTED:
                ret = set_adv_mode_directed(p_advertising, &p_advertising->adv_params);
                break;
    
            case BLE_ADV_MODE_FAST:
                ret = set_adv_mode_fast(p_advertising, &p_advertising->adv_params);
                break;
    
            case BLE_ADV_MODE_SLOW:
                ret = set_adv_mode_slow(p_advertising, &p_advertising->adv_params);
                break;
    
            case BLE_ADV_MODE_IDLE:
                p_advertising->adv_evt = BLE_ADV_EVT_IDLE;
                break;
    
            default:
                break;
        }
    
        if (p_advertising->adv_mode_current != BLE_ADV_MODE_IDLE)
        {
    
            ret = sd_ble_gap_adv_set_configure(&p_advertising->adv_handle, p_advertising->p_adv_data, &p_advertising->adv_params);
            if (ret != NRF_SUCCESS)
            {
                return ret;
            }
            ret = sd_ble_gap_adv_start(p_advertising->adv_handle, p_advertising->conn_cfg_tag);
    
            if (ret != NRF_SUCCESS)
            {
                return ret;
            }
        }
    
        if (p_advertising->evt_handler != NULL)
        {
            p_advertising->evt_handler(p_advertising->adv_evt);
        }
    
        return NRF_SUCCESS;
    }
    
    
    void ble_advertising_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context)
    {
        ble_advertising_t * p_advertising = (ble_advertising_t *)p_context;
    
        switch (p_ble_evt->header.evt_id)
        {
            case BLE_GAP_EVT_CONNECTED:
                on_connected(p_advertising, p_ble_evt);
                break;
    
            // Upon disconnection, whitelist will be activated and direct advertising is started.
            case BLE_GAP_EVT_DISCONNECTED:
                on_disconnected(p_advertising, p_ble_evt);
                break;
    
            // Upon terminated advertising (time-out), the next advertising mode is started.
            case BLE_GAP_EVT_ADV_SET_TERMINATED:
                on_terminated(p_advertising, p_ble_evt);
                break;
    
            default:
                break;
        }
    }
    
    
    void ble_advertising_on_sys_evt(uint32_t evt_id, void * p_context)
    {
        ble_advertising_t * p_advertising = (ble_advertising_t *)p_context;
    
        switch (evt_id)
        {
            //When a flash operation finishes, re-attempt to start advertising operations.
            case NRF_EVT_FLASH_OPERATION_SUCCESS:
            case NRF_EVT_FLASH_OPERATION_ERROR:
            {
                if (p_advertising->advertising_start_pending)
                {
                    p_advertising->advertising_start_pending = false;
                    ret_code_t ret = ble_advertising_start(p_advertising,
                                                           p_advertising->adv_mode_current);
    
                    if ((ret != NRF_SUCCESS) && (p_advertising->error_handler != NULL))
                    {
                        p_advertising->error_handler(ret);
                    }
                }
            } break;
    
            default:
                // No implementation needed.
                break;
        }
    }
    
    
    uint32_t ble_advertising_peer_addr_reply(ble_advertising_t * const p_advertising,
                                             ble_gap_addr_t          * p_peer_address)
    {
        if (!p_advertising->peer_addr_reply_expected)
        {
            return NRF_ERROR_INVALID_STATE;
        }
    
        p_advertising->peer_addr_reply_expected = false;
    
        memcpy(&p_advertising->peer_address, p_peer_address, sizeof(p_advertising->peer_address));
    
        return NRF_SUCCESS;
    }
    
    
    uint32_t ble_advertising_whitelist_reply(ble_advertising_t * const p_advertising,
                                             ble_gap_addr_t    const * p_gap_addrs,
                                             uint32_t               addr_cnt,
                                             ble_gap_irk_t  const * p_gap_irks,
                                             uint32_t               irk_cnt)
    {
        if (!p_advertising->whitelist_reply_expected)
        {
            return NRF_ERROR_INVALID_STATE;
        }
    
        p_advertising->whitelist_reply_expected = false;
        p_advertising->whitelist_in_use         = ((addr_cnt > 0) || (irk_cnt > 0));
    
        return NRF_SUCCESS;
    }
    
    
    uint32_t ble_advertising_restart_without_whitelist(ble_advertising_t * const p_advertising)
    {
        ret_code_t ret;
    
        (void) sd_ble_gap_adv_stop(p_advertising->adv_handle);
    
        p_advertising->whitelist_temporarily_disabled = true;
        p_advertising->whitelist_in_use               = false;
        p_advertising->adv_params.filter_policy       = BLE_GAP_ADV_FP_ANY;
        // Set correct flags.
        ret = flags_set(p_advertising, BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);
        VERIFY_SUCCESS(ret);
    
        ret = ble_advertising_start(p_advertising, p_advertising->adv_mode_current);
        if ((ret != NRF_SUCCESS) && (p_advertising->error_handler != NULL))
        {
            p_advertising->error_handler(ret);
        }
    
        return NRF_SUCCESS;
    }
    
    
    void ble_advertising_modes_config_set(ble_advertising_t            * const p_advertising,
                                          ble_adv_modes_config_t const * const p_adv_modes_config)
    {
        p_advertising->adv_modes_config = *p_adv_modes_config;
    }
    
    
    #endif // NRF_MODULE_ENABLED(BLE_ADVERTISING)
    

    main.c

    changes only its power(ine 1155) in advertising_init

    err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV,m_advertising.adv_handle,8);
    APP_ERROR_CHECK(err_code);

    /**
     * Copyright (c) 2014 - 2018, 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.
     * 
     */
    /**
     * @brief BLE Heart Rate and Running speed Relay application main file.
     *
     * @detail This application demonstrates a simple "Relay".
     * Meaning we pass on the values that we receive. By combining a collector part on
     * one end and a sensor part on the other, we show that the s130 can function
     * simultaneously as a central and a peripheral device.
     *
     * In the figure below, the sensor ble_app_hrs connects and interacts with the relay
     * in the same manner it would connect to a heart rate collector. In this case, the Relay
     * application acts as a central.
     *
     * On the other side, a collector (such as Master Control panel or ble_app_hrs_c) connects
     * and interacts with the relay the same manner it would connect to a heart rate sensor peripheral.
     *
     * Led layout:
     * LED 1: Central side is scanning       LED 2: Central side is connected to a peripheral
     * LED 3: Peripheral side is advertising LED 4: Peripheral side is connected to a central
     *
     * @note While testing, be careful that the Sensor and Collector are actually connecting to the Relay,
     *       and not directly to each other!
     *
     *    Peripheral                  Relay                    Central
     *    +--------+        +-----------|----------+        +-----------+
     *    | Heart  |        | Heart     |   Heart  |        |           |
     *    | Rate   | -----> | Rate     -|-> Rate   | -----> | Collector |
     *    | Sensor |        | Collector |   Sensor |        |           |
     *    +--------+        +-----------|   and    |        +-----------+
     *                      | Running   |   Running|
     *    +--------+        | Speed    -|-> Speed  |
     *    | Running|------> | Collector |   Sensor |
     *    | Speed  |        +-----------|----------+
     *    | Sensor |
     *    +--------+
     */
    
    #include <stdint.h>
    #include <stdio.h>
    #include <string.h>
    #include "nordic_common.h"
    #include "nrf_sdh.h"
    #include "nrf_sdh_soc.h"
    #include "nrf_sdh_ble.h"
    #include "peer_manager.h"
    #include "app_timer.h"
    #include "bsp_btn_ble.h"
    #include "ble.h"
    #include "ble_advdata.h"
    #include "ble_advertising.h"
    #include "ble_conn_params.h"
    #include "ble_db_discovery.h"
    #include "ble_hrs.h"
    #include "ble_rscs.h"
    #include "ble_hrs_c.h"
    #include "ble_rscs_c.h"
    #include "ble_conn_state.h"
    #include "nrf_fstorage.h"
    #include "fds.h"
    #include "nrf_ble_gatt.h"
    #include "nrf_ble_qwr.h"
    #include "nrf_pwr_mgmt.h"
    
    #include "nrf_log.h"
    #include "nrf_log_ctrl.h"
    #include "nrf_log_default_backends.h"
    
    
    #define PERIPHERAL_ADVERTISING_LED      BSP_BOARD_LED_2
    #define PERIPHERAL_CONNECTED_LED        BSP_BOARD_LED_3
    #define CENTRAL_SCANNING_LED            BSP_BOARD_LED_0
    #define CENTRAL_CONNECTED_LED           BSP_BOARD_LED_1
    
    #define DEVICE_NAME                     "DONGLE"                                     /**< Name of device used for advertising. */
    #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_DURATION                18000                                       /**< The advertising duration (180 seconds) in units of 10 milliseconds. */
    
    #define APP_BLE_CONN_CFG_TAG            1                                           /**< A tag identifying the SoftDevice BLE configuration. */
    
    #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 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 in octets. */
    #define SEC_PARAM_MAX_KEY_SIZE          16                                          /**< Maximum encryption key size in octets. */
    
    #define SCAN_INTERVAL                   0x00A0                                      /**< Determines scan interval in units of 0.625 millisecond. */
    #define SCAN_WINDOW                     0x0050                                      /**< Determines scan window in units of 0.625 millisecond. */
    
    #define SCAN_DURATION                   0x0000                                      /**< Duration of the scanning in units of 10 milliseconds. If set to 0x0000, scanning will continue until it is explicitly disabled. */
    
    
    #define MIN_CONNECTION_INTERVAL         (uint16_t) MSEC_TO_UNITS(7.5, UNIT_1_25_MS) /**< Determines minimum connection interval in milliseconds. */
    #define MAX_CONNECTION_INTERVAL         (uint16_t) MSEC_TO_UNITS(30, UNIT_1_25_MS)  /**< Determines maximum connection interval in milliseconds. */
    #define SLAVE_LATENCY                   0                                           /**< Determines slave latency in terms of connection events. */
    #define SUPERVISION_TIMEOUT             (uint16_t) MSEC_TO_UNITS(4000, UNIT_10_MS)  /**< Determines supervision time-out in units of 10 milliseconds. */
    
    /**@brief   Priority of the application BLE event handler.
     * @note    You shouldn't need to modify this value.
     */
    #define APP_BLE_OBSERVER_PRIO           3
    
    
    static ble_hrs_t m_hrs;                                             /**< Heart rate service instance. */
    static ble_rscs_t m_rscs;                                           /**< Running speed and cadence service instance. */
    static ble_hrs_c_t m_hrs_c;                                         /**< Heart rate service client instance. */
    static ble_rscs_c_t m_rscs_c;                                       /**< Running speed and cadence service client instance. */
    
    NRF_BLE_GATT_DEF(m_gatt);                                           /**< GATT module instance. */
    NRF_BLE_QWRS_DEF(m_qwr, NRF_SDH_BLE_TOTAL_LINK_COUNT);              /**< Context for the Queued Write module.*/
    BLE_ADVERTISING_DEF(m_advertising);                                 /**< Advertising module instance. */
    BLE_DB_DISCOVERY_ARRAY_DEF(m_db_discovery, 2);                      /**< Database discovery module instances. */
    
    static uint16_t m_conn_handle_hrs_c  = BLE_CONN_HANDLE_INVALID;     /**< Connection handle for the HRS central application */
    static uint16_t m_conn_handle_rscs_c = BLE_CONN_HANDLE_INVALID;     /**< Connection handle for the RSC central application */
    
    /**@brief names which the central applications will scan for, and which will be advertised by the peripherals.
     *  if these are set to empty strings, the UUIDs defined below will be used
     */
    static char const m_target_periph_name[] = "";
    
    /**@brief UUIDs which the central applications will scan for if the name above is set to an empty string,
     * and which will be advertised by the peripherals.
     */
    static ble_uuid_t m_adv_uuids[] =
    {
        {BLE_UUID_HEART_RATE_SERVICE,        BLE_UUID_TYPE_BLE},
        {BLE_UUID_RUNNING_SPEED_AND_CADENCE, BLE_UUID_TYPE_BLE}
    };
    
    /**@brief Parameters used when scanning. */
    static ble_gap_scan_params_t const m_scan_params =
    {
        .extended      = 1,
        .active        = 1,
        .interval      = SCAN_INTERVAL,
        .window        = SCAN_WINDOW,
        .timeout       = SCAN_DURATION,
        .scan_phys     = BLE_GAP_PHY_1MBPS,
        .filter_policy = BLE_GAP_SCAN_FP_ACCEPT_ALL,
    };
    
    static uint8_t m_scan_buffer_data[BLE_GAP_SCAN_BUFFER_EXTENDED_MIN]; /**< buffer where advertising reports will be stored by the SoftDevice. */
    
    /**@brief Pointer to the buffer where advertising reports will be stored by the SoftDevice. */
    static ble_data_t m_scan_buffer =
    {
        m_scan_buffer_data,
        BLE_GAP_SCAN_BUFFER_EXTENDED_MIN
    };
    
    /**@brief Connection parameters requested for connection. */
    static ble_gap_conn_params_t const m_connection_param =
    {
        MIN_CONNECTION_INTERVAL,
        MAX_CONNECTION_INTERVAL,
        SLAVE_LATENCY,
        SUPERVISION_TIMEOUT
    };
    
    
    /**@brief Function to handle 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] 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 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 initiating scanning.
     */
    static void scan_start(void)
    {
        ret_code_t err_code;
    
        (void) sd_ble_gap_scan_stop();
    
        err_code = sd_ble_gap_scan_start(&m_scan_params, &m_scan_buffer);
        // It is okay to ignore this error since we are stopping the scan anyway.
        if (err_code != NRF_ERROR_INVALID_STATE)
        {
            APP_ERROR_CHECK(err_code);
        }
    }
    
    
    /**@brief Function for initiating advertising and scanning.
     */
    static void adv_scan_start(void)
    {
        ret_code_t err_code;
    
        //check if there are no flash operations in progress
        if (!nrf_fstorage_is_busy(NULL))
        {
            // Start scanning for peripherals and initiate connection to devices which
            // advertise Heart Rate or Running speed and cadence UUIDs.
           // scan_start();
    
            // Turn on the LED to signal scanning.
            //bsp_board_led_on(CENTRAL_SCANNING_LED);
    
            // Start advertising.
            err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
            APP_ERROR_CHECK(err_code);
        }
    }
    
    
    /**@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.");
            } break;
    
            case PM_EVT_CONN_SEC_SUCCEEDED:
            {
                NRF_LOG_INFO("Connection secured: role: %d, conn_handle: 0x%x, procedure: %d.",
                             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_NO_SPACE_IN_QUEUES)
                {
                    // Retry.
                }
                else
                {
                    APP_ERROR_CHECK(err_code);
                }
            } break;
    
            case PM_EVT_PEERS_DELETE_SUCCEEDED:
            {
                adv_scan_start();
            } 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_LOCAL_DB_CACHE_APPLIED:
            case PM_EVT_LOCAL_DB_CACHE_APPLY_FAILED:
                // This can happen when the local DB has changed.
            case PM_EVT_SERVICE_CHANGED_IND_SENT:
            case PM_EVT_SERVICE_CHANGED_IND_CONFIRMED:
            default:
                break;
        }
    }
    
    
    /**@brief Handles events coming from the Heart Rate central module.
     */
    static void hrs_c_evt_handler(ble_hrs_c_t * p_hrs_c, ble_hrs_c_evt_t * p_hrs_c_evt)
    {
        switch (p_hrs_c_evt->evt_type)
        {
            case BLE_HRS_C_EVT_DISCOVERY_COMPLETE:
            {
                if (m_conn_handle_hrs_c == BLE_CONN_HANDLE_INVALID)
                {
                    ret_code_t err_code;
    
                    m_conn_handle_hrs_c = p_hrs_c_evt->conn_handle;
                    NRF_LOG_INFO("HRS discovered on conn_handle 0x%x", m_conn_handle_hrs_c);
    
                    err_code = ble_hrs_c_handles_assign(p_hrs_c,
                                                        m_conn_handle_hrs_c,
                                                        &p_hrs_c_evt->params.peer_db);
                    APP_ERROR_CHECK(err_code);
                    // Initiate bonding.
                    err_code = pm_conn_secure(m_conn_handle_hrs_c, false);
                    if (err_code != NRF_ERROR_INVALID_STATE)
                    {
                        APP_ERROR_CHECK(err_code);
                    }
    
                    // Heart rate service discovered. Enable notification of Heart Rate Measurement.
                    err_code = ble_hrs_c_hrm_notif_enable(p_hrs_c);
                    APP_ERROR_CHECK(err_code);
                }
            } break; // BLE_HRS_C_EVT_DISCOVERY_COMPLETE
    
            case BLE_HRS_C_EVT_HRM_NOTIFICATION:
            {
                ret_code_t err_code;
    
                NRF_LOG_INFO("Heart Rate = %d", p_hrs_c_evt->params.hrm.hr_value);
    
                err_code = ble_hrs_heart_rate_measurement_send(&m_hrs, p_hrs_c_evt->params.hrm.hr_value);
                if ((err_code != NRF_SUCCESS) &&
                    (err_code != NRF_ERROR_INVALID_STATE) &&
                    (err_code != NRF_ERROR_RESOURCES) &&
                    (err_code != NRF_ERROR_BUSY) &&
                    (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
                    )
                {
                    APP_ERROR_HANDLER(err_code);
                }
            } break; // BLE_HRS_C_EVT_HRM_NOTIFICATION
    
            default:
                // No implementation needed.
                break;
        }
    }
    
    
    /**@brief Handles events coming from  Running Speed and Cadence central module.
     */
    static void rscs_c_evt_handler(ble_rscs_c_t * p_rscs_c, ble_rscs_c_evt_t * p_rscs_c_evt)
    {
        switch (p_rscs_c_evt->evt_type)
        {
            case BLE_RSCS_C_EVT_DISCOVERY_COMPLETE:
            {
                if (m_conn_handle_rscs_c == BLE_CONN_HANDLE_INVALID)
                {
                    ret_code_t err_code;
    
                    m_conn_handle_rscs_c = p_rscs_c_evt->conn_handle;
                    NRF_LOG_INFO("Running Speed and Cadence service discovered on conn_handle 0x%x",
                                 m_conn_handle_rscs_c);
    
                    err_code = ble_rscs_c_handles_assign(p_rscs_c,
                                                        m_conn_handle_rscs_c,
                                                        &p_rscs_c_evt->params.rscs_db);
                    APP_ERROR_CHECK(err_code);
    
                    // Initiate bonding.
                    err_code = pm_conn_secure(m_conn_handle_rscs_c, false);
                    if (err_code != NRF_ERROR_INVALID_STATE)
                    {
                        APP_ERROR_CHECK(err_code);
                    }
    
                    // Running speed cadence service discovered. Enable notifications.
                    err_code = ble_rscs_c_rsc_notif_enable(p_rscs_c);
                    APP_ERROR_CHECK(err_code);
                }
            } break; // BLE_RSCS_C_EVT_DISCOVERY_COMPLETE:
    
            case BLE_RSCS_C_EVT_RSC_NOTIFICATION:
            {
                ret_code_t      err_code;
                ble_rscs_meas_t rscs_measurment;
    
                NRF_LOG_INFO("Speed      = %d", p_rscs_c_evt->params.rsc.inst_speed);
    
                rscs_measurment.is_running                  = p_rscs_c_evt->params.rsc.is_running;
                rscs_measurment.is_inst_stride_len_present  = p_rscs_c_evt->params.rsc.is_inst_stride_len_present;
                rscs_measurment.is_total_distance_present   = p_rscs_c_evt->params.rsc.is_total_distance_present;
    
                rscs_measurment.inst_stride_length = p_rscs_c_evt->params.rsc.inst_stride_length;
                rscs_measurment.inst_cadence       = p_rscs_c_evt->params.rsc.inst_cadence;
                rscs_measurment.inst_speed         = p_rscs_c_evt->params.rsc.inst_speed;
                rscs_measurment.total_distance     = p_rscs_c_evt->params.rsc.total_distance;
    
                err_code = ble_rscs_measurement_send(&m_rscs, &rscs_measurment);
                if ((err_code != NRF_SUCCESS) &&
                    (err_code != NRF_ERROR_INVALID_STATE) &&
                    (err_code != NRF_ERROR_RESOURCES) &&
                    (err_code != NRF_ERROR_BUSY) &&
                    (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
                    )
                {
                    APP_ERROR_HANDLER(err_code);
                }
            } break; // BLE_RSCS_C_EVT_RSC_NOTIFICATION
    
            default:
                // No implementation needed.
                break;
        }
    }
    
    
    /**@brief Function for handling the advertising report BLE event.
     *
     * @param[in] p_adv_report  Advertising report from the SoftDevice.
     */
    static void on_adv_report(ble_gap_evt_adv_report_t const * p_adv_report)
    {
        ret_code_t err_code;
    
        if (strlen(m_target_periph_name) != 0)
        {
            if (ble_advdata_name_find(p_adv_report->data.p_data,
                                      p_adv_report->data.len,
                                      m_target_periph_name))
            {
                // Initiate connection.
                err_code = sd_ble_gap_connect(&p_adv_report->peer_addr,
                                              &m_scan_params,
                                              &m_connection_param,
                                              APP_BLE_CONN_CFG_TAG);
                if (err_code != NRF_SUCCESS)
                {
                    NRF_LOG_INFO("Connection Request Failed, reason %d", err_code);
                }
            }
            else
            {
                err_code = sd_ble_gap_scan_start(NULL, &m_scan_buffer);
                APP_ERROR_CHECK(err_code);
            }
        }
        else
        {
            ble_uuid_t target_uuid_hr = {.uuid = BLE_UUID_HEART_RATE_SERVICE, .type = BLE_UUID_TYPE_BLE};
            ble_uuid_t target_uuid_rs = {.uuid = BLE_UUID_RUNNING_SPEED_AND_CADENCE, .type = BLE_UUID_TYPE_BLE};
    
            // We do not want to connect to two peripherals offering the same service, so when
            // a UUID is matched, we check whether we are not already connected to a peer which
            // offers the same service.
            if (   (ble_advdata_uuid_find(p_adv_report->data.p_data, p_adv_report->data.len, &target_uuid_hr)
                    && (m_conn_handle_hrs_c == BLE_CONN_HANDLE_INVALID))
                || (ble_advdata_uuid_find(p_adv_report->data.p_data, p_adv_report->data.len, &target_uuid_rs)
                    && (m_conn_handle_rscs_c == BLE_CONN_HANDLE_INVALID)))
            {
                // Initiate connection.
                err_code = sd_ble_gap_connect(&p_adv_report->peer_addr,
                                              &m_scan_params,
                                              &m_connection_param,
                                              APP_BLE_CONN_CFG_TAG);
                if (err_code != NRF_SUCCESS)
                {
                    NRF_LOG_WARNING("Connection Request Failed, reason %d", err_code);
                }
            }
            else
            {
                err_code = sd_ble_gap_scan_start(NULL, &m_scan_buffer);
                APP_ERROR_CHECK(err_code);
            }
        }
    }
    
    
    /**@brief Function for assigning new connection handle to available instance of QWR module.
     *
     * @param[in] conn_handle New connection handle.
     */
    static void multi_qwr_conn_handle_assign(uint16_t conn_handle)
    {
        for (uint32_t i = 0; i < NRF_SDH_BLE_TOTAL_LINK_COUNT; i++)
        {
            if (m_qwr[i].conn_handle == BLE_CONN_HANDLE_INVALID)
            {
                ret_code_t err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr[i], conn_handle);
                APP_ERROR_CHECK(err_code);
                break;
            }
        }
    }
    
    
    /**@brief   Function for handling BLE events from central applications.
     *
     * @details This function parses scanning reports and initiates a connection to peripherals when a
     *          target UUID is found. It updates the status of LEDs used to report central applications
     *          activity.
     *
     * @param[in]   p_ble_evt   Bluetooth stack event.
     */
    static void on_ble_central_evt(ble_evt_t const * p_ble_evt)
    {
        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)
        {
            // Upon connection, check which peripheral has connected (HR or RSC), initiate DB
            // discovery, update LEDs status and resume scanning if necessary.
            case BLE_GAP_EVT_CONNECTED:
            {
                NRF_LOG_INFO("Central connected");
                // If no Heart Rate sensor or RSC sensor is currently connected, try to find them on this peripheral.
                if (   (m_conn_handle_hrs_c  == BLE_CONN_HANDLE_INVALID)
                    || (m_conn_handle_rscs_c == BLE_CONN_HANDLE_INVALID))
                {
                    NRF_LOG_INFO("Attempt to find HRS or RSC on conn_handle 0x%x", p_gap_evt->conn_handle);
    
                    err_code = ble_db_discovery_start(&m_db_discovery[0], p_gap_evt->conn_handle);
                    if (err_code == NRF_ERROR_BUSY)
                    {
                        err_code = ble_db_discovery_start(&m_db_discovery[1], p_gap_evt->conn_handle);
                        APP_ERROR_CHECK(err_code);
                    }
                    else
                    {
                        APP_ERROR_CHECK(err_code);
                    }
                }
    
                // Assing connection handle to the QWR module.
                multi_qwr_conn_handle_assign(p_gap_evt->conn_handle);
    
                // Update LEDs status, and check if we should be looking for more peripherals to connect to.
                bsp_board_led_on(CENTRAL_CONNECTED_LED);
                if (ble_conn_state_central_conn_count() == NRF_SDH_BLE_CENTRAL_LINK_COUNT)
                {
                    bsp_board_led_off(CENTRAL_SCANNING_LED);
                }
                else
                {
                    // Resume scanning.
                    bsp_board_led_on(CENTRAL_SCANNING_LED);
                    scan_start();
                }
            } break; // BLE_GAP_EVT_CONNECTED
    
            // Upon disconnection, reset the connection handle of the peer which disconnected,
            // update the LEDs status and start scanning again.
            case BLE_GAP_EVT_DISCONNECTED:
            {
                if (p_gap_evt->conn_handle == m_conn_handle_hrs_c)
                {
                    NRF_LOG_INFO("HRS central disconnected (reason: %d)",
                                 p_gap_evt->params.disconnected.reason);
    
                    m_conn_handle_hrs_c = BLE_CONN_HANDLE_INVALID;
                }
                if (p_gap_evt->conn_handle == m_conn_handle_rscs_c)
                {
                    NRF_LOG_INFO("RSC central disconnected (reason: %d)",
                                 p_gap_evt->params.disconnected.reason);
    
                    m_conn_handle_rscs_c = BLE_CONN_HANDLE_INVALID;
                }
    
                if (   (m_conn_handle_rscs_c == BLE_CONN_HANDLE_INVALID)
                    || (m_conn_handle_hrs_c  == BLE_CONN_HANDLE_INVALID))
                {
                    // Start scanning
                    scan_start();
    
                    // Update LEDs status.
                    bsp_board_led_on(CENTRAL_SCANNING_LED);
                }
    
                if (ble_conn_state_central_conn_count() == 0)
                {
                    bsp_board_led_off(CENTRAL_CONNECTED_LED);
                }
            } break; // BLE_GAP_EVT_DISCONNECTED
    
            case BLE_GAP_EVT_ADV_REPORT:
            {
                on_adv_report(&p_gap_evt->params.adv_report);
            } break; // BLE_GAP_ADV_REPORT
    
            case BLE_GAP_EVT_TIMEOUT:
            {
                // We have not specified a timeout for scanning, so only connection attemps can timeout.
                if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN)
                {
                    NRF_LOG_INFO("Connection Request timed out.");
                }
            } break;
    
            case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST:
            {
                // Accept parameters requested by peer.
                err_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle,
                                            &p_gap_evt->params.conn_param_update_request.conn_params);
                APP_ERROR_CHECK(err_code);
            } break;
    
            case BLE_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;
    
            default:
                // No implementation needed.
                break;
        }
    }
    
    
    /**@brief   Function for handling BLE events from peripheral applications.
     * @details Updates the status LEDs used to report the activity of the peripheral applications.
     *
     * @param[in]   p_ble_evt   Bluetooth stack event.
     */
    static void on_ble_peripheral_evt(ble_evt_t const * p_ble_evt)
    {
        ret_code_t err_code;
    
        switch (p_ble_evt->header.evt_id)
        {
            case BLE_GAP_EVT_CONNECTED:
                NRF_LOG_INFO("Peripheral connected");
                bsp_board_led_off(PERIPHERAL_ADVERTISING_LED);
                bsp_board_led_on(PERIPHERAL_CONNECTED_LED);
    
                // Assing connection handle to the QWR module.
                multi_qwr_conn_handle_assign(p_ble_evt->evt.gap_evt.conn_handle);
                break;
    
            case BLE_GAP_EVT_DISCONNECTED:
                NRF_LOG_INFO("Peripheral disconnected");
               // bsp_board_led_off(PERIPHERAL_CONNECTED_LED);
                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;
    
            default:
                // No implementation needed.
                break;
        }
    }
    
    
    /**@brief Function for handling advertising events.
     *
     * @param[in] ble_adv_evt  Advertising event.
     */
    static void on_adv_evt(ble_adv_evt_t ble_adv_evt)
    {
        switch (ble_adv_evt)
        {
            case BLE_ADV_EVT_FAST:
            {
                NRF_LOG_INFO("Fast advertising.");
                bsp_board_led_off(PERIPHERAL_ADVERTISING_LED);
            } break;
    
            case BLE_ADV_EVT_IDLE:
            {
                ret_code_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
                APP_ERROR_CHECK(err_code);
            } break;
    
            default:
                // No implementation needed.
                break;
        }
    }
    
    
    /**@brief Function for checking if a bluetooth stack event is an advertising timeout.
     *
     * @param[in] p_ble_evt Bluetooth stack event.
     */
    static bool ble_evt_is_advertising_timeout(ble_evt_t const * p_ble_evt)
    {
        return (p_ble_evt->header.evt_id == BLE_GAP_EVT_ADV_SET_TERMINATED);
    }
    
    
    /**@brief Function for handling BLE events.
     *
     * @param[in]   p_ble_evt   Bluetooth stack event.
     * @param[in]   p_context   Unused.
     */
    static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
    {
        uint16_t conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
        uint16_t role        = ble_conn_state_role(conn_handle);
    
        // Based on the role this device plays in the connection, dispatch to the right handler.
        if (role == BLE_GAP_ROLE_PERIPH || ble_evt_is_advertising_timeout(p_ble_evt))
        {
            ble_hrs_on_ble_evt(p_ble_evt, &m_hrs);
            ble_rscs_on_ble_evt(p_ble_evt, &m_rscs);
            on_ble_peripheral_evt(p_ble_evt);
        }
        else if ((role == BLE_GAP_ROLE_CENTRAL) || (p_ble_evt->header.evt_id == BLE_GAP_EVT_ADV_REPORT))
        {
            ble_hrs_c_on_ble_evt(p_ble_evt, &m_hrs_c);
            ble_rscs_c_on_ble_evt(p_ble_evt, &m_rscs_c);
            on_ble_central_evt(p_ble_evt);
        }
    }
    
    
    /**@brief Heart rate collector initialization.
     */
    static void hrs_c_init(void)
    {
        ret_code_t       err_code;
        ble_hrs_c_init_t hrs_c_init_obj;
    
        hrs_c_init_obj.evt_handler = hrs_c_evt_handler;
    
        err_code = ble_hrs_c_init(&m_hrs_c, &hrs_c_init_obj);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief RSC collector initialization.
     */
    static void rscs_c_init(void)
    {
        ret_code_t        err_code;
        ble_rscs_c_init_t rscs_c_init_obj;
    
        rscs_c_init_obj.evt_handler = rscs_c_evt_handler;
    
        err_code = ble_rscs_c_init(&m_rscs_c, &rscs_c_init_obj);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing the BLE stack.
     *
     * @details Initializes the SoftDevice and the BLE event interrupts.
     */
    static void ble_stack_init(void)
    {
        ret_code_t err_code;
    
        err_code = nrf_sdh_enable_request();
        APP_ERROR_CHECK(err_code);
    
        // Configure the BLE stack 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 the Peer Manager initialization.
     */
    static void peer_manager_init(void)
    {
        ble_gap_sec_params_t sec_param;
        ret_code_t err_code;
    
        err_code = pm_init();
        APP_ERROR_CHECK(err_code);
    
        memset(&sec_param, 0, sizeof(ble_gap_sec_params_t));
    
        // Security parameters to be used for all security procedures.
        sec_param.bond           = SEC_PARAM_BOND;
        sec_param.mitm           = SEC_PARAM_MITM;
        sec_param.lesc           = SEC_PARAM_LESC;
        sec_param.keypress       = SEC_PARAM_KEYPRESS;
        sec_param.io_caps        = SEC_PARAM_IO_CAPABILITIES;
        sec_param.oob            = SEC_PARAM_OOB;
        sec_param.min_key_size   = SEC_PARAM_MIN_KEY_SIZE;
        sec_param.max_key_size   = SEC_PARAM_MAX_KEY_SIZE;
        sec_param.kdist_own.enc  = 1;
        sec_param.kdist_own.id   = 1;
        sec_param.kdist_peer.enc = 1;
        sec_param.kdist_peer.id  = 1;
    
        err_code = pm_sec_params_set(&sec_param);
        APP_ERROR_CHECK(err_code);
    
        err_code = pm_register(pm_evt_handler);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Clear bond information from persistent storage.
     */
    static void delete_bonds(void)
    {
        ret_code_t err_code;
    
        NRF_LOG_INFO("Erase bonds!");
    
        err_code = pm_peers_delete();
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for 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)
    {
        ret_code_t err_code;
        bsp_event_t startup_event;
    
        err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, NULL);
        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 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)
    {
        ret_code_t              err_code;
        ble_gap_conn_params_t   gap_conn_params;
        ble_gap_conn_sec_mode_t sec_mode;
    
        BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
    
        err_code = sd_ble_gap_device_name_set(&sec_mode,
                                              (const uint8_t *)DEVICE_NAME,
                                              strlen(DEVICE_NAME));
        APP_ERROR_CHECK(err_code);
    
        memset(&gap_conn_params, 0, sizeof(gap_conn_params));
    
        gap_conn_params.min_conn_interval = MIN_CONNECTION_INTERVAL;
        gap_conn_params.max_conn_interval = MAX_CONNECTION_INTERVAL;
        gap_conn_params.slave_latency     = SLAVE_LATENCY;
        gap_conn_params.conn_sup_timeout  = SUPERVISION_TIMEOUT;
    
        err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing the GATT module.
     */
    static void gatt_init(void)
    {
        ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, NULL);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing the Connection Parameters module.
     */
    static void conn_params_init(void)
    {
        ret_code_t             err_code;
        ble_conn_params_init_t cp_init;
    
        memset(&cp_init, 0, sizeof(cp_init));
    
        cp_init.p_conn_params                  = NULL;
        cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
        cp_init.next_conn_params_update_delay  = NEXT_CONN_PARAMS_UPDATE_DELAY;
        cp_init.max_conn_params_update_count   = MAX_CONN_PARAMS_UPDATE_COUNT;
        cp_init.start_on_notify_cccd_handle    = BLE_CONN_HANDLE_INVALID; // Start upon connection.
        cp_init.disconnect_on_fail             = true;
        cp_init.evt_handler                    = NULL;  // Ignore events.
        cp_init.error_handler                  = conn_params_error_handler;
    
        err_code = ble_conn_params_init(&cp_init);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for handling database discovery events.
     *
     * @details This function is callback function to handle events from the database discovery module.
     *          Depending on the UUIDs that are discovered, this function should forward the events
     *          to their respective services.
     *
     * @param[in] p_event  Pointer to the database discovery event.
     */
    static void db_disc_handler(ble_db_discovery_evt_t * p_evt)
    {
        ble_hrs_on_db_disc_evt(&m_hrs_c, p_evt);
        ble_rscs_on_db_disc_evt(&m_rscs_c, p_evt);
    }
    
    
    /**
     * @brief Database discovery initialization.
     */
    static void db_discovery_init(void)
    {
        ret_code_t err_code = ble_db_discovery_init(db_disc_handler);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for 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 initializing services that will be used by the application.
     *
     * @details Initialize the Heart Rate, Battery and Device Information services.
     */
    static void services_init(void)
    {
        ret_code_t         err_code;
        ble_hrs_init_t     hrs_init;
        ble_rscs_init_t    rscs_init;
        nrf_ble_qwr_init_t qwr_init = {0};
        uint8_t            body_sensor_location;
    
        // Initialize Queued Write Module instances.
        qwr_init.error_handler = nrf_qwr_error_handler;
    
        for (uint32_t i = 0; i < NRF_SDH_BLE_TOTAL_LINK_COUNT; i++)
        {
            err_code = nrf_ble_qwr_init(&m_qwr[i], &qwr_init);
            APP_ERROR_CHECK(err_code);
        }
    
        // Initialize the Heart Rate Service.
        body_sensor_location = BLE_HRS_BODY_SENSOR_LOCATION_FINGER;
    
        memset(&hrs_init, 0, sizeof(hrs_init));
    
        hrs_init.evt_handler                 = NULL;
        hrs_init.is_sensor_contact_supported = true;
        hrs_init.p_body_sensor_location      = &body_sensor_location;
    
        // Here the sec level for the Heart Rate Service can be changed/increased.
        BLE_GAP_CONN_SEC_MODE_SET_OPEN(&hrs_init.hrs_hrm_attr_md.cccd_write_perm);
        BLE_GAP_CONN_SEC_MODE_SET_NO_ACCESS(&hrs_init.hrs_hrm_attr_md.read_perm);
        BLE_GAP_CONN_SEC_MODE_SET_NO_ACCESS(&hrs_init.hrs_hrm_attr_md.write_perm);
    
        BLE_GAP_CONN_SEC_MODE_SET_OPEN(&hrs_init.hrs_bsl_attr_md.read_perm);
        BLE_GAP_CONN_SEC_MODE_SET_NO_ACCESS(&hrs_init.hrs_bsl_attr_md.write_perm);
    
        err_code = ble_hrs_init(&m_hrs, &hrs_init);
        APP_ERROR_CHECK(err_code);
    
        // Initialize the Running Speed and Cadence Service.
        memset(&rscs_init, 0, sizeof(rscs_init));
    
        rscs_init.evt_handler = NULL;
        rscs_init.feature     = BLE_RSCS_FEATURE_INSTANT_STRIDE_LEN_BIT |
                                BLE_RSCS_FEATURE_WALKING_OR_RUNNING_STATUS_BIT;
    
        // Here the sec level for the Running Speed and Cadence Service can be changed/increased.
        BLE_GAP_CONN_SEC_MODE_SET_OPEN(&rscs_init.rsc_meas_attr_md.cccd_write_perm);
        BLE_GAP_CONN_SEC_MODE_SET_NO_ACCESS(&rscs_init.rsc_meas_attr_md.read_perm);
        BLE_GAP_CONN_SEC_MODE_SET_NO_ACCESS(&rscs_init.rsc_meas_attr_md.write_perm);
    
        BLE_GAP_CONN_SEC_MODE_SET_OPEN(&rscs_init.rsc_feature_attr_md.read_perm);
        BLE_GAP_CONN_SEC_MODE_SET_NO_ACCESS(&rscs_init.rsc_feature_attr_md.write_perm);
    
        err_code = ble_rscs_init(&m_rscs, &rscs_init);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing the Advertising functionality.
     */
    static void advertising_init(void)
    {
        ret_code_t             err_code;
        ble_advertising_init_t init;
    
        memset(&init, 0, sizeof(init));
    
        init.advdata.name_type               = BLE_ADVDATA_FULL_NAME;
        init.advdata.include_appearance      = true;
        init.advdata.flags                   = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
        init.advdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
        init.advdata.uuids_complete.p_uuids  = m_adv_uuids;
    
        init.config.ble_adv_fast_enabled  = true;
        init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
        init.config.ble_adv_fast_timeout  = APP_ADV_DURATION;
    
        init.evt_handler = on_adv_evt;
    //		err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV,&m_advertising,8);
      //  APP_ERROR_CHECK(err_code);
        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,8);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing logging.
     */
    static void log_init(void)
    {
        ret_code_t err_code = NRF_LOG_INIT(NULL);
        APP_ERROR_CHECK(err_code);
    
        NRF_LOG_DEFAULT_BACKENDS_INIT();
    }
    
    
    /**@brief Function for initializing 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). 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();
        }
    }
    
    
    /**@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 application main entry.
     */
    int main(void)
    {
        bool erase_bonds;
    
        // Initialize.
    	 NRF_CLOCK->TASKS_HFCLKSTART = 1;
      while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0);
        log_init();
        timer_init();
    	  NRF_LOG_INFO("Calixto example started.");
        buttons_leds_init(&erase_bonds);
    	  bsp_board_led_off(PERIPHERAL_CONNECTED_LED);
        power_management_init();
    	 // bsp_board_led_on(PERIPHERAL_CONNECTED_LED);
        ble_stack_init();
        gap_params_init();
        gatt_init();
        conn_params_init();
        db_discovery_init();
        peer_manager_init();
        hrs_c_init();
        rscs_c_init();
        services_init();
        advertising_init();
    
        // Start execution.
        NRF_LOG_INFO("Relay example started.");
    
        if (erase_bonds == true)
        {
            // Scanning and advertising is done upon PM_EVT_PEERS_DELETE_SUCCEEDED event.
            delete_bonds();
        }
        else
        {
            adv_scan_start();
        }
                bsp_board_led_off(CENTRAL_SCANNING_LED);
    
        // Enter main loop.
        for (;;)
        {
            idle_state_handle();
    			       // idle_state_handle();
    
    		//	NRF_LOG_INFO("loop");
        }
    }
    
    

    Still i face some problems can you validate these files. its works in dongle but the range is not sufficient i don't know why these types of behavior

    First test:-

    but the code ble app uart long range example gets from github works fine(SDK 14 and softdevice (s140_nrf52840_6.0.0-6.alpha_softdevice)

    Second test:-

    when the 1 dongle as receiver with (SDK 14 and s140_nrf52840_6.0.0-6.alpha_softdevice)

    another dongle as Advertiser(relay example)(SDK 15 and s140_nrf52_6.0.0_softdevice)

    here i face range issue in long range(check only advertising from dongle recived or not)

    is it softdevice or SDK makes any difference in performance?

    third test:-

    1 dongle as receiver(SDK 14 and s140_nrf52840_6.0.0-6.alpha_softdevice ) and custom board as advertiser(both application program(ble_app_uart_long range and relay example ).

    receiver doesn't find the advertising.

    i need to find a solution for this

  • I see in errata sheet of nrf52840 

    is  this a problem in my custom board?

  • Do you have one of those build codes mentioned if you look on the 52840 chip? This blog post details all of the changes you need to make to get long range working. As long as you follow that, it should work.

    Most likely, it could be related to the antenna on the dongle. It is not as big as the antenna on the 52840 dk & therefore some radio parameters might not be as good & lead to the decreased range you are noticing.

    Like I have mentioned before, the 52840 dongle is not a dev kit! The idea is not to develop on the dongle. At the very least, I would recommend getting a 52840 dev kit. That way, you can use the Segger J-Link to debug the dongle properly & get logging information.

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