long range

Hello All,

I am having trouble changing the 'ble_app_multiperipheral_pca1056_s140' example to work with long range. I have read a few of the blog posts and similar devzone posts but I can't seem to find an answer that works. 

Here is my code for configuring the gap advertising set:

   // only extended advertising will allow primary phy to be coded
    NRF_LOG_INFO("Advertising type set to EXTENDED_CONNECTABLE_NONSCANNABLE_UNDIRECTED ");
    //adv_params.properties.type = BLE_GAP_ADV_TYPE_CONNECTABLE_SCANNABLE_UNDIRECTED;
    adv_params.properties.type = BLE_GAP_ADV_TYPE_EXTENDED_CONNECTABLE_NONSCANNABLE_UNDIRECTED;
              
    err_code = ble_advdata_encode(&advdata, m_adv_data.adv_data.p_data, &m_adv_data.adv_data.len);
    APP_ERROR_CHECK(err_code);

    // Start advertising.
    memset(&adv_params, 0, sizeof(adv_params));
    adv_params.p_peer_addr   = NULL;
    adv_params.filter_policy = BLE_GAP_ADV_FP_ANY;
    adv_params.interval      = APP_ADV_INTERVAL;
    adv_params.duration      = 0;//APP_ADV_DURATION;

    NRF_LOG_INFO("Setting adv params phy to coded phy .. ");
    adv_params.primary_phy     = BLE_GAP_PHY_CODED;
    //adv_params.secondary_phy   = BLE_GAP_PHY_CODED;

    err_code = sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data, &adv_params);
    APP_ERROR_CHECK(err_code);
}

The error I get is :

<info> app: Setting adv params phy to coded phy ..

<error> app: ERROR 7 [NRF_ERROR_INVALID_PARAM] at :0

PC at: 0x00000000

<error> app: End of error report

Any help where I am going wrong or anything that I have missed would really be appreciated.

Cheers

Michael

Parents
  • Hi Michael, for extended advertising to work, it must use the secondary phy.

    When using extended advertising, the primary phy is only used to "point" over to the secondary phy, where the much longer data can exist.

    So you probably don't want to comment out the secondary phy. :)

  • Hi 

    Thanks for the input. I have tried it with and without priory to submitting the ticket and it didn't make any difference (the error 7 was still reported). 

    Also;

    Do you know what the 'adv_params.duration'  should be set too? (I have tried both 0 and APP_ADV_DURATION)  ??

    Do I need to add the line (i'm not sure what the srdata is used for) - 

    err_code = ble_advdata_encode(&srdata, m_adv_data.scan_rsp_data.p_data, &m_adv_data.scan_rsp_data.len);  ??

    I can't seem to find a large amount of information on the setting requirements for long range so I'm shooting in the dark 

    Any help appreciated

    Cheers

    Michael

  • Setting duration to 0 means no timeout. 

    APP_ADV_DURATION should be defined in your project somwhere as a timeout.

    srdata (scan response data) is not used together with extended advertising, and should not be encoded.

    Below I copypasted the documentation for advertising types. (The one you are using is non-scannable)

    /**@defgroup BLE_GAP_ADV_TYPES GAP Advertising types
     *
     * Advertising types defined in Bluetooth Core Specification v5.0, Vol 6, Part B, Section 4.4.2.
     *
     * The maximum advertising data length is defined by @ref BLE_GAP_ADV_SET_DATA_SIZE_MAX.
     * Note that some of the advertising types do not support advertising data. Non-scannable types do not support
     * scan response data.

    What about advdata?

     * @retval ::NRF_ERROR_INVALID_PARAM                   Invalid parameter(s) supplied:
     *                                                      - Invalid advertising data configuration specified. See @ref ble_gap_adv_data_t.
     *                                                      - Invalid configuration of p_adv_params. See @ref ble_gap_adv_params_t.
     *                                                      - Use of whitelist requested but whitelist has not been set,
     *                                                        see @ref sd_ble_gap_whitelist_set.

    The documentation says NRF_ERROR_INVALID_PARAM can come from invalid advertising data. Not just adv params.

    So maybe you can show more of what happened to m_adv_data in your code? Did you change it from the original example? Or is the code you listed the only code you changed?

    Is this on SDK 15.0.0?

  • Hi  

    The code is only a slight modification of the original ble_pheripheral>experimental>ble_app_multiperipheral example from SDK15.0.0_a53641a.

    Please find below my code - the main changes are to add a second push button 

    /**
     * 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.
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     * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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     * 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 Multiperipheral Sample Application main file.
     *
     * This file contains the source code for a sample server application with multiple peripheral connections using the LED Button service.
     */
    
    
    #include <stdint.h>
    #include <string.h>
    #include "nordic_common.h"
    #include "nrf.h"
    #include "boards.h"
    #include "app_error.h"
    #include "ble.h"
    #include "ble_err.h"
    #include "ble_hci.h"
    #include "ble_srv_common.h"
    #include "ble_advdata.h"
    #include "ble_conn_params.h"
    #include "ble_conn_state.h"
    #include "nrf_sdh.h"
    #include "nrf_sdh_ble.h"
    #include "app_timer.h"
    #include "app_button.h"
    #include "ble_lbs.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 DEVICE_NAME                     "Nordic_Blinky"                         /**< Name of device. Will be included in the advertising data. */
    
    #define APP_BLE_CONN_CFG_TAG            1                                       /**< A tag identifying the SoftDevice BLE configuration. */
    #define LINK_TOTAL                      NRF_SDH_BLE_PERIPHERAL_LINK_COUNT + \
                                            NRF_SDH_BLE_CENTRAL_LINK_COUNT
    
    #define ADVERTISING_LED                 BSP_BOARD_LED_0                         /**< Is on when device is advertising. */
    #define CONNECTED_LED                   BSP_BOARD_LED_1                         /**< Is on when device has connected. */
    #define LEDBUTTON_LED                   BSP_BOARD_LED_2                         /**< LED to be toggled with the help of the LED Button Service. */
    #define LEDBUTTON_BUTTON                BSP_BUTTON_0                            /**< Button that will trigger the notification event with the LED Button Service */
    
    #define APP_ADV_INTERVAL                64                                      /**< The advertising interval (in units of 0.625 ms; this value corresponds to 40 ms). */
    #define APP_ADV_DURATION                BLE_GAP_ADV_TIMEOUT_GENERAL_UNLIMITED   /**< The advertising duration (180 seconds) in units of 10 milliseconds. */
    
    #define MIN_CONN_INTERVAL               MSEC_TO_UNITS(100, UNIT_1_25_MS)        /**< Minimum acceptable connection interval (0.5 seconds). */
    #define MAX_CONN_INTERVAL               MSEC_TO_UNITS(200, UNIT_1_25_MS)        /**< Maximum acceptable connection interval (1 second). */
    #define SLAVE_LATENCY                   0                                       /**< Slave latency. */
    #define CONN_SUP_TIMEOUT                MSEC_TO_UNITS(4000, UNIT_10_MS)         /**< Connection supervisory time-out (4 seconds). */
    
    #define FIRST_CONN_PARAMS_UPDATE_DELAY  APP_TIMER_TICKS(20000)                  /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (15 seconds). */
    #define NEXT_CONN_PARAMS_UPDATE_DELAY   APP_TIMER_TICKS(5000)                   /**< Time between each call to sd_ble_gap_conn_param_update after the first call (5 seconds). */
    #define MAX_CONN_PARAMS_UPDATE_COUNT    3                                       /**< Number of attempts before giving up the connection parameter negotiation. */
    
    #define BUTTON_DETECTION_DELAY          APP_TIMER_TICKS(50)                     /**< Delay from a GPIOTE event until a button is reported as pushed (in number of timer ticks). */
    
    #define DEAD_BEEF                       0xDEADBEEF                              /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */
    
    
    
    //#define BOARD_PCA10059  1
    #define BOARD_PCA10056 1
    
    //MD - Added
    #if  defined(BOARD_PCA10056)
    #define SIDE_PIN_NUMBER       24 //button 3 -> P0.24 //NRF_GPIO_PIN_MAP(0, 11)
    #define GREEN_LED_PIN_NUMBER  NRF_GPIO_PIN_MAP(0, 13)
    #define BLUE_LED_PIN_NUMBER   NRF_GPIO_PIN_MAP(0, 14)
    #elif defined(BOARD_PCA10059)
    #define SIDE_PIN_NUMBER       (32+6) //NRF_GPIO_PIN_MAP(1, 6)
    #define GREEN_LED_PIN_NUMBER  (32+9) //NRF_GPIO_PIN_MAP(1, 9)
    #define BLUE_LED_PIN_NUMBER   12 //NRF_GPIO_PIN_MAP(0, 12)
    #endif
    
    
    
    /**@brief   Priority of the application BLE event handler.
     * @note    You shouldn't need to modify this value.
     */
    #define APP_BLE_OBSERVER_PRIO    3
    
    static uint8_t m_adv_handle = BLE_GAP_ADV_SET_HANDLE_NOT_SET;                   /**< Advertising handle used to identify an advertising set. */
    static uint8_t m_enc_advdata[BLE_GAP_ADV_SET_DATA_SIZE_MAX];                    /**< Buffer for storing an encoded advertising set. */
    static uint8_t m_enc_scan_response_data[BLE_GAP_ADV_SET_DATA_SIZE_MAX];         /**< Buffer for storing an encoded scan data. */
    
    /**@brief Struct that contains pointers to the encoded advertising data. */
    static ble_gap_adv_data_t m_adv_data =
    {
        .adv_data =
        {
            .p_data = m_enc_advdata,
            .len    = BLE_GAP_ADV_SET_DATA_SIZE_MAX
        },
        .scan_rsp_data =
        {
            .p_data = m_enc_scan_response_data,
            .len    = BLE_GAP_ADV_SET_DATA_SIZE_MAX
    
        }
    };
    
    
    BLE_LBS_DEF(m_lbs);                                                             /**< LED Button Service 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.*/
    
    /**@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 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(DEAD_BEEF, line_num, p_file_name);
    }
    
    
    /**@brief Function for the LEDs initialization.
     *
     * @details Initializes all LEDs used by the application.
     */
    static void leds_init(void)
    {
        bsp_board_init(BSP_INIT_LEDS);
    }
    
    
    /**@brief Function for the Timer initialization.
     *
     * @details Initializes the timer module.
     */
    static void timers_init(void)
    {
        // Initialize timer module, making it use the scheduler
        ret_code_t err_code = app_timer_init();
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for the GAP initialization.
     *
     * @details This function sets up all the necessary GAP (Generic Access Profile) parameters of the
     *          device including the device name, appearance, and the preferred connection parameters.
     */
    static void gap_params_init(void)
    {
        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_CONN_INTERVAL;
        gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
        gap_conn_params.slave_latency     = SLAVE_LATENCY;
        gap_conn_params.conn_sup_timeout  = CONN_SUP_TIMEOUT;
    
        err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing 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 Advertising functionality.
     *
     * @details Encodes the required advertising data and passes it to the stack.
     *          Also builds a structure to be passed to the stack when starting advertising.
     */
    static void advertising_init(void)
    {
        ret_code_t           err_code;
        ble_advdata_t        advdata;
        ble_advdata_t        srdata;
        ble_gap_adv_params_t adv_params;
    
    
        ble_uuid_t adv_uuids[] = {{LBS_UUID_SERVICE, m_lbs.uuid_type}};
    
        // Build and set advertising data.
        memset(&advdata, 0, sizeof(advdata));
    
        advdata.name_type          = BLE_ADVDATA_FULL_NAME;
        advdata.include_appearance = true;
        advdata.flags              = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
    
    
        memset(&srdata, 0, sizeof(srdata));
        srdata.uuids_complete.uuid_cnt = sizeof(adv_uuids) / sizeof(adv_uuids[0]);
        srdata.uuids_complete.p_uuids  = adv_uuids;
    
    #define LONG_RANGE_SELECTED 1
    #if  defined(LONG_RANGE_SELECTED)
        // only extended advertising will allow primary phy to be coded
        NRF_LOG_INFO("Advertising type set to EXTENDED_CONNECTABLE_NONSCANNABLE_UNDIRECTED ");
        //adv_params.properties.type = BLE_GAP_ADV_TYPE_CONNECTABLE_SCANNABLE_UNDIRECTED;
        adv_params.properties.type = BLE_GAP_ADV_TYPE_EXTENDED_CONNECTABLE_NONSCANNABLE_UNDIRECTED;
                  
        err_code = ble_advdata_encode(&advdata, m_adv_data.adv_data.p_data, &m_adv_data.adv_data.len);
        APP_ERROR_CHECK(err_code);
    
        // Start advertising.
        memset(&adv_params, 0, sizeof(adv_params));
        adv_params.p_peer_addr   = NULL;
        adv_params.filter_policy = BLE_GAP_ADV_FP_ANY;
        adv_params.interval      = APP_ADV_INTERVAL;
        adv_params.duration      = 0;//APP_ADV_DURATION;
    
        NRF_LOG_INFO("Setting adv params phy to coded phy .. ");
        adv_params.primary_phy     = BLE_GAP_PHY_CODED;
        adv_params.secondary_phy   = BLE_GAP_PHY_CODED;
     adv_params.scan_req_notification =1; //recently added MD 7/9/18
    
    
    
    #else
        err_code = ble_advdata_encode(&advdata, m_adv_data.adv_data.p_data, &m_adv_data.adv_data.len);
        APP_ERROR_CHECK(err_code);
    
        err_code = ble_advdata_encode(&srdata, m_adv_data.scan_rsp_data.p_data, &m_adv_data.scan_rsp_data.len);
        APP_ERROR_CHECK(err_code);
    
        // Start advertising.
        memset(&adv_params, 0, sizeof(adv_params));
        adv_params.p_peer_addr   = NULL;
        adv_params.filter_policy = BLE_GAP_ADV_FP_ANY;
        adv_params.interval      = APP_ADV_INTERVAL;
    
        adv_params.properties.type = BLE_GAP_ADV_TYPE_CONNECTABLE_SCANNABLE_UNDIRECTED;
        adv_params.duration        = APP_ADV_DURATION;
        adv_params.primary_phy     =BLE_GAP_PHY_1MBPS;  //MD changed for extended broadcast range -old
    
    #endif
    
        err_code = sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data, &adv_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 write events to the LED characteristic.
     *
     * @param[in] p_lbs     Instance of LED Button Service to which the write applies.
     * @param[in] led_state Written/desired state of the LED.
     */
     //NRF_LOG_INFO("Main.c (277) led_write_handler > MD LED  %x", led_state);
    static void led_write_handler(uint16_t conn_handle, ble_lbs_t * p_lbs, uint8_t led_state)
    {
    //define input(s)
    nrf_gpio_cfg(SIDE_PIN_NUMBER, NRF_GPIO_PIN_DIR_INPUT,NRF_GPIO_PIN_INPUT_CONNECT ,NRF_GPIO_PIN_PULLUP ,NRF_GPIO_PIN_S0S1 ,  NRF_GPIO_PIN_NOSENSE );
        //nrf_gpio_pin_dir_set(SIDE_PIN_NUMBER, NRF_GPIO_PIN_DIR_INPUT);
    
    //define output(s)
        nrf_gpio_pin_dir_set(GREEN_LED_PIN_NUMBER,NRF_GPIO_PIN_DIR_OUTPUT);
        nrf_gpio_pin_dir_set(BLUE_LED_PIN_NUMBER,NRF_GPIO_PIN_DIR_OUTPUT);
    
         if(nrf_gpio_pin_read(SIDE_PIN_NUMBER))                           // if I am the LH unit 
         {
            if( (led_state == 1)  || (led_state == 3) )
            {
              NRF_LOG_INFO("Left ON");
              nrf_gpio_pin_clear(GREEN_LED_PIN_NUMBER);
              nrf_gpio_pin_set(BLUE_LED_PIN_NUMBER);
            }
            else
            {
              NRF_LOG_INFO("Left OFF");
              nrf_gpio_pin_set(GREEN_LED_PIN_NUMBER);
              nrf_gpio_pin_set(BLUE_LED_PIN_NUMBER);
            }
         }
         else                                                           // if I am the RH unit 
         {
            if( (led_state == 2) || (led_state == 3) )
            {
              NRF_LOG_INFO("Right ON");
              nrf_gpio_pin_clear(BLUE_LED_PIN_NUMBER);
              nrf_gpio_pin_set(GREEN_LED_PIN_NUMBER);
            }
            else
            {
              NRF_LOG_INFO("Right OFF");
              nrf_gpio_pin_set(BLUE_LED_PIN_NUMBER);
              nrf_gpio_pin_set(GREEN_LED_PIN_NUMBER);
            }
         }
    }
    
    
    /**@brief Function for initializing services that will be used by the application.
     */
    static void services_init(void)
    {
        ret_code_t         err_code;
        ble_lbs_init_t     init;
        nrf_ble_qwr_init_t qwr_init = {0};
    
        // Initialize Queued Write Module instances.
        qwr_init.error_handler = nrf_qwr_error_handler;
    
        for (uint32_t i = 0; i < LINK_TOTAL; i++)
        {
            err_code = nrf_ble_qwr_init(&m_qwr[i], &qwr_init);
            APP_ERROR_CHECK(err_code);
        }
    
        // Initialize LBS.
        init.led_write_handler = led_write_handler;
    
        err_code = ble_lbs_init(&m_lbs, &init);
        APP_ERROR_CHECK(err_code);
    
        ble_conn_state_init();
    }
    
    
    /**@brief Function for handling a Connection Parameters error.
     *
     * @param[in] nrf_error  Error code containing information about what went wrong.
     */
    static void conn_params_error_handler(uint32_t nrf_error)
    {
        APP_ERROR_HANDLER(nrf_error);
    }
    
    
    /**@brief Function for initializing the Connection Parameters module.
     */
    static void conn_params_init(void)
    {
        ret_code_t             err_code;
        ble_conn_params_init_t cp_init;
    
        memset(&cp_init, 0, sizeof(cp_init));
    
        cp_init.p_conn_params                  = NULL;
        cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
        cp_init.next_conn_params_update_delay  = NEXT_CONN_PARAMS_UPDATE_DELAY;
        cp_init.max_conn_params_update_count   = MAX_CONN_PARAMS_UPDATE_COUNT;
        cp_init.start_on_notify_cccd_handle    = BLE_GATT_HANDLE_INVALID;
        cp_init.disconnect_on_fail             = true;
        cp_init.error_handler                  = conn_params_error_handler;
    
        err_code = ble_conn_params_init(&cp_init);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for starting advertising.
     */
    static void advertising_start(void)
    {
        ret_code_t err_code;
    
        err_code = sd_ble_gap_adv_start(m_adv_handle, APP_BLE_CONN_CFG_TAG);
    
        APP_ERROR_CHECK(err_code);
        bsp_board_led_on(ADVERTISING_LED);
    }
    
    
    /**@brief Function for handling the Connected event.
     *
     * @param[in] p_gap_evt GAP event received from the BLE stack.
     */
    static void on_connected(const ble_gap_evt_t * const p_gap_evt)
    {
        ret_code_t  err_code;
        uint32_t    periph_link_cnt = ble_conn_state_peripheral_conn_count(); // Number of peripheral links.
    
        NRF_LOG_INFO("Connection with link 0x%x established.", p_gap_evt->conn_handle);
    
        // Assign connection handle to available instance of QWR module.
        for (uint32_t i = 0; i < NRF_SDH_BLE_PERIPHERAL_LINK_COUNT; i++)
        {
            if (m_qwr[i].conn_handle == BLE_CONN_HANDLE_INVALID)
            {
                err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr[i], p_gap_evt->conn_handle);
                APP_ERROR_CHECK(err_code);
                break;
            }
        }
    
        err_code = app_button_enable();
        APP_ERROR_CHECK(err_code);
    
        // Update LEDs
        bsp_board_led_on(CONNECTED_LED);
        if (periph_link_cnt == NRF_SDH_BLE_PERIPHERAL_LINK_COUNT)
        {
            bsp_board_led_off(ADVERTISING_LED);
        }
        else
        {
            // Continue advertising. More connections can be established because the maximum link count has not been reached.
            advertising_start();
        }
    }
    
    
    /**@brief Function for handling the Disconnected event.
     *
     * @param[in] p_gap_evt GAP event received from the BLE stack.
     */
    static void on_disconnected(ble_gap_evt_t const * const p_gap_evt)
    {
        ret_code_t  err_code;
        uint32_t    periph_link_cnt = ble_conn_state_peripheral_conn_count(); // Number of peripheral links.
    
        NRF_LOG_INFO("Connection 0x%x has been disconnected. Reason: 0x%X",
                     p_gap_evt->conn_handle,
                     p_gap_evt->params.disconnected.reason);
    
        if (periph_link_cnt == 0)
        {
            bsp_board_led_off(CONNECTED_LED);
            err_code = app_button_disable();
            APP_ERROR_CHECK(err_code);
        }
    
        if (periph_link_cnt == (NRF_SDH_BLE_PERIPHERAL_LINK_COUNT - 1))
        {
            // Advertising is not running when all connections are taken, and must therefore be started.
            advertising_start();
        }
    }
    
    
    /**@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;
    
        switch (p_ble_evt->header.evt_id)
        {
            case BLE_GAP_EVT_CONNECTED:
                on_connected(&p_ble_evt->evt.gap_evt);
                break;
    
            case BLE_GAP_EVT_DISCONNECTED:
                on_disconnected(&p_ble_evt->evt.gap_evt);
                break;
    
            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;
    
            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_GATTS_EVT_SYS_ATTR_MISSING:
                // No system attributes have been stored.
                err_code = sd_ble_gatts_sys_attr_set(p_ble_evt->evt.gap_evt.conn_handle, NULL, 0, 0);
                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 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 writing to the LED characteristic of all connected clients.
     *
     * @details Based on if the button is pressed or released, this function writes a high or low
     *          LED status to the server.
     *
     * @param[in] button_action The button action (press/release).
     *            Determines if the LEDs of the servers will be ON or OFF.
     *
     * @return If successful NRF_SUCCESS is returned. Otherwise, the error code from @ref ble_lbs_led_status_send.
     */
    static uint32_t led_status_send_to_all(uint8_t button_action)
    {
        ret_code_t                        err_code;
        ble_conn_state_conn_handle_list_t conn_handles = ble_conn_state_periph_handles();
    
        for (uint8_t i = 0; i < conn_handles.len; i++)
        {
            err_code = ble_lbs_on_button_change(conn_handles.conn_handles[i], &m_lbs, button_action);
    
            if (err_code != NRF_SUCCESS &&
                err_code != BLE_ERROR_INVALID_CONN_HANDLE &&
                err_code != NRF_ERROR_INVALID_STATE &&
                err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
            {
                APP_ERROR_CHECK(err_code);
                NRF_LOG_DEBUG("Sent button change 0x%x on connection handle 0x%x.", button_action, conn_handles.conn_handles[i]);
            }
        }
        return NRF_SUCCESS;
    }
    
    
    /**@brief Function for handling events from the button handler module.
     *
     * @param[in] pin_no        The pin that the event applies to.
     * @param[in] button_action The button action (press/release).
     */
    static void button_event_handler(uint8_t pin_no, uint8_t button_action)
    {
        ret_code_t err_code;
    
        switch (pin_no)
        {
            case LEDBUTTON_BUTTON:
                err_code = led_status_send_to_all(button_action);
                if (err_code == NRF_SUCCESS)
                {
                    NRF_LOG_INFO("Sent button state change to all connected centrals.");
                }
                break;
    
            default:
                APP_ERROR_HANDLER(pin_no);
                break;
        }
    }
    
    
    /**@brief Function for initializing the button handler module.
     */
    static void buttons_init(void)
    {
        ret_code_t err_code;
    
        //The array must be static because a pointer to it will be saved in the button handler module.
        static app_button_cfg_t buttons[] =
        {
            {LEDBUTTON_BUTTON, false, BUTTON_PULL, button_event_handler}
        };
    
        err_code = app_button_init(buttons, ARRAY_SIZE(buttons),
                                   BUTTON_DETECTION_DELAY);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing the logging 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();
        }
    }
    
    
    /**@brief Function for application main entry.
     */
    int main(void)
    {
        // Initialize.
        log_init();
        timers_init();
    
    //MD - Added
    #if  defined(BOARD_PCA10056)
        leds_init();
    #elif defined(BOARD_PCA10059)
       leds_init();
    #endif
    
        buttons_init();
        power_management_init();
        ble_stack_init();
        gap_params_init();
        gatt_init();
        services_init();
        advertising_init();
        conn_params_init();
    
        // Start execution.
        NRF_LOG_INFO("Multiperipheral example started.");
        advertising_start();
    
        // Enter main loop.
        for (;;)
        {
            idle_state_handle();
        }
    }

    Thanks for looking at this

    Cheers

    Michael

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