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Updating Advertising Service Data

Good afternoon,

I'm running advertising with a uint16_t service data associated with a 16-bit service UUID.

I would like to update the service data regularly without the need to update the whole advertising package.

Is there a way to do this similarly to the flags_set() function in the BLE Advertising Module? When I try to accomplish it by recurring to "uint8_t * p_service_data = ble_advdata_parse(p_advertising->adv_data.adv_data.p_data, p_advertising->adv_data.adv_data.len, BLE_GAP_AD_TYPE_SERVICE_DATA)" I can never return the correct offset in the advertising data related to the Service Data field - it always returns 0 offset - and therefore can't access the actual Service Data to update it. Any suggestions to accomplish this?

Thank you,

João

Parents
  • Hi Martin,

    Thank you for your reply.

    I'm totally sure the advertising packet contains the ServiceData and it is working as expected. I'm updating the whole advertising data everytime I need to update the ServiceData and it works perfectly.

    Any queues what might be wrong?

    Thank you,

    João

  • Not sure what it can be. Do you mind sharing your code? We can make the case private if you prefer confidentiality. 

  • Hi,

    What SDK are you using? I tried to use your advertising_init() and sdata_set() functions together with the ble_app_uart example in SDK 15 and it seems to work fine. ble_advdata_parse() returns the address of Service Data in the advertising packet and the offset is correct. When you call ble_advdata_parse(), can you check the value of p_advertising->adv_data.adv_data.len and make sure that it makes sense? Maybe the length has been altered somewhere and that your Service Data is "out of range".

  • Here is the code I used for testing btw:

    /**
     * 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.
     * 
     */
    /** @file
     *
     * @defgroup ble_sdk_uart_over_ble_main main.c
     * @{
     * @ingroup  ble_sdk_app_nus_eval
     * @brief    UART over BLE application main file.
     *
     * This file contains the source code for a sample application that uses the Nordic UART service.
     * This application uses the @ref srvlib_conn_params module.
     */
    
    
    #include <stdint.h>
    #include <string.h>
    #include "nordic_common.h"
    #include "nrf.h"
    #include "ble_hci.h"
    #include "ble_advdata.h"
    #include "ble_advertising.h"
    #include "ble_conn_params.h"
    #include "nrf_sdh.h"
    #include "nrf_sdh_soc.h"
    #include "nrf_sdh_ble.h"
    #include "nrf_ble_gatt.h"
    #include "nrf_ble_qwr.h"
    #include "app_timer.h"
    #include "ble_nus.h"
    #include "app_uart.h"
    #include "app_util_platform.h"
    #include "bsp_btn_ble.h"
    #include "nrf_pwr_mgmt.h"
    #include "nrf_delay.h"
    
    #if defined (UART_PRESENT)
    #include "nrf_uart.h"
    #endif
    #if defined (UARTE_PRESENT)
    #include "nrf_uarte.h"
    #endif
    
    #include "nrf_log.h"
    #include "nrf_log_ctrl.h"
    #include "nrf_log_default_backends.h"
    
    #define APP_BLE_CONN_CFG_TAG            1                                           /**< A tag identifying the SoftDevice BLE configuration. */
    
    #define DEVICE_NAME                     "ART"                               /**< Name of device. Will be included in the advertising data. */
    #define NUS_SERVICE_UUID_TYPE           BLE_UUID_TYPE_VENDOR_BEGIN                  /**< UUID type for the Nordic UART Service (vendor specific). */
    
    #define APP_BLE_OBSERVER_PRIO           3                                           /**< Application's BLE observer priority. You shouldn't need to modify this value. */
    
    #define APP_ADV_INTERVAL                64                                          /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */
    
    #define APP_ADV_DURATION                18000                                       /**< The advertising duration (180 seconds) in units of 10 milliseconds. */
    
    #define MIN_CONN_INTERVAL               MSEC_TO_UNITS(20, UNIT_1_25_MS)             /**< Minimum acceptable connection interval (20 ms), Connection interval uses 1.25 ms units. */
    #define MAX_CONN_INTERVAL               MSEC_TO_UNITS(75, UNIT_1_25_MS)             /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */
    #define SLAVE_LATENCY                   0                                           /**< Slave latency. */
    #define CONN_SUP_TIMEOUT                MSEC_TO_UNITS(4000, UNIT_10_MS)             /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
    #define FIRST_CONN_PARAMS_UPDATE_DELAY  APP_TIMER_TICKS(5000)                       /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
    #define NEXT_CONN_PARAMS_UPDATE_DELAY   APP_TIMER_TICKS(30000)                      /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
    #define MAX_CONN_PARAMS_UPDATE_COUNT    3                                           /**< Number of attempts before giving up the connection parameter negotiation. */
    
    #define DEAD_BEEF                       0xDEADBEEF                                  /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */
    
    #define UART_TX_BUF_SIZE                256                                         /**< UART TX buffer size. */
    #define UART_RX_BUF_SIZE                256                                         /**< UART RX buffer size. */
    
    
    BLE_NUS_DEF(m_nus, NRF_SDH_BLE_TOTAL_LINK_COUNT);                                   /**< BLE NUS service instance. */
    NRF_BLE_GATT_DEF(m_gatt);                                                           /**< GATT module instance. */
    NRF_BLE_QWR_DEF(m_qwr);                                                             /**< Context for the Queued Write module.*/
    BLE_ADVERTISING_DEF(m_advertising);                                                 /**< Advertising module instance. */
    
    static uint16_t   m_conn_handle          = BLE_CONN_HANDLE_INVALID;                 /**< Handle of the current connection. */
    static uint16_t   m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - 3;            /**< Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module. */
    //static ble_uuid_t m_adv_uuids[]          =                                          /**< Universally unique service identifier. */
    //{
    //    {BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}
    //};
    
    
    /**@brief Function for assert macro callback.
     *
     * @details This function will be called in case of an assert in the SoftDevice.
     *
     * @warning This handler is an example only and does not fit a final product. You need to analyse
     *          how your product is supposed to react in case of Assert.
     * @warning On assert from the SoftDevice, the system can only recover on reset.
     *
     * @param[in] line_num    Line number of the failing ASSERT call.
     * @param[in] p_file_name File name of the failing ASSERT call.
     */
    void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
    {
        app_error_handler(DEAD_BEEF, line_num, p_file_name);
    }
    
    /**@brief Function for initializing the timer module.
     */
    static void timers_init(void)
    {
        ret_code_t err_code = app_timer_init();
        APP_ERROR_CHECK(err_code);
    }
    
    /**@brief Function for the GAP initialization.
     *
     * @details This function will set up all the necessary GAP (Generic Access Profile) parameters of
     *          the device. It also sets the permissions and appearance.
     */
    static void gap_params_init(void)
    {
        uint32_t                err_code;
        ble_gap_conn_params_t   gap_conn_params;
        ble_gap_conn_sec_mode_t sec_mode;
    
        BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
    
        err_code = sd_ble_gap_device_name_set(&sec_mode,
                                              (const uint8_t *) DEVICE_NAME,
                                              strlen(DEVICE_NAME));
        APP_ERROR_CHECK(err_code);
    
        memset(&gap_conn_params, 0, sizeof(gap_conn_params));
    
        gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
        gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
        gap_conn_params.slave_latency     = SLAVE_LATENCY;
        gap_conn_params.conn_sup_timeout  = CONN_SUP_TIMEOUT;
    
        err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for handling Queued Write Module errors.
     *
     * @details A pointer to this function will be passed to each service which may need to inform the
     *          application about an error.
     *
     * @param[in]   nrf_error   Error code containing information about what went wrong.
     */
    static void nrf_qwr_error_handler(uint32_t nrf_error)
    {
        APP_ERROR_HANDLER(nrf_error);
    }
    
    
    /**@brief Function for handling the data from the Nordic UART Service.
     *
     * @details This function will process the data received from the Nordic UART BLE Service and send
     *          it to the UART module.
     *
     * @param[in] p_evt       Nordic UART Service event.
     */
    /**@snippet [Handling the data received over BLE] */
    static void nus_data_handler(ble_nus_evt_t * p_evt)
    {
    
        if (p_evt->type == BLE_NUS_EVT_RX_DATA)
        {
            uint32_t err_code;
    
            NRF_LOG_DEBUG("Received data from BLE NUS. Writing data on UART.");
            NRF_LOG_HEXDUMP_DEBUG(p_evt->params.rx_data.p_data, p_evt->params.rx_data.length);
    
            for (uint32_t i = 0; i < p_evt->params.rx_data.length; i++)
            {
                do
                {
                    err_code = app_uart_put(p_evt->params.rx_data.p_data[i]);
                    if ((err_code != NRF_SUCCESS) && (err_code != NRF_ERROR_BUSY))
                    {
                        NRF_LOG_ERROR("Failed receiving NUS message. Error 0x%x. ", err_code);
                        APP_ERROR_CHECK(err_code);
                    }
                } while (err_code == NRF_ERROR_BUSY);
            }
            if (p_evt->params.rx_data.p_data[p_evt->params.rx_data.length - 1] == '\r')
            {
                while (app_uart_put('\n') == NRF_ERROR_BUSY);
            }
        }
    
    }
    /**@snippet [Handling the data received over BLE] */
    
    
    /**@brief Function for initializing services that will be used by the application.
     */
    static void services_init(void)
    {
        uint32_t           err_code;
        ble_nus_init_t     nus_init;
        nrf_ble_qwr_init_t qwr_init = {0};
    
        // Initialize Queued Write Module.
        qwr_init.error_handler = nrf_qwr_error_handler;
    
        err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init);
        APP_ERROR_CHECK(err_code);
    
        // Initialize NUS.
        memset(&nus_init, 0, sizeof(nus_init));
    
        nus_init.data_handler = nus_data_handler;
    
        err_code = ble_nus_init(&m_nus, &nus_init);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for handling an event from the Connection Parameters Module.
     *
     * @details This function will be called for all events in the Connection Parameters Module
     *          which are passed to the application.
     *
     * @note All this function does is to disconnect. This could have been done by simply setting
     *       the disconnect_on_fail config parameter, but instead we use the event handler
     *       mechanism to demonstrate its use.
     *
     * @param[in] p_evt  Event received from the Connection Parameters Module.
     */
    static void on_conn_params_evt(ble_conn_params_evt_t * p_evt)
    {
        uint32_t err_code;
    
        if (p_evt->evt_type == BLE_CONN_PARAMS_EVT_FAILED)
        {
            err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_CONN_INTERVAL_UNACCEPTABLE);
            APP_ERROR_CHECK(err_code);
        }
    }
    
    
    /**@brief Function for handling errors from the Connection Parameters module.
     *
     * @param[in] nrf_error  Error code containing information about what went wrong.
     */
    static void conn_params_error_handler(uint32_t nrf_error)
    {
        APP_ERROR_HANDLER(nrf_error);
    }
    
    
    /**@brief Function for initializing the Connection Parameters module.
     */
    static void conn_params_init(void)
    {
        uint32_t               err_code;
        ble_conn_params_init_t cp_init;
    
        memset(&cp_init, 0, sizeof(cp_init));
    
        cp_init.p_conn_params                  = NULL;
        cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
        cp_init.next_conn_params_update_delay  = NEXT_CONN_PARAMS_UPDATE_DELAY;
        cp_init.max_conn_params_update_count   = MAX_CONN_PARAMS_UPDATE_COUNT;
        cp_init.start_on_notify_cccd_handle    = BLE_GATT_HANDLE_INVALID;
        cp_init.disconnect_on_fail             = false;
        cp_init.evt_handler                    = on_conn_params_evt;
        cp_init.error_handler                  = conn_params_error_handler;
    
        err_code = ble_conn_params_init(&cp_init);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for putting the chip into sleep mode.
     *
     * @note This function will not return.
     */
    static void sleep_mode_enter(void)
    {
        uint32_t err_code = bsp_indication_set(BSP_INDICATE_IDLE);
        APP_ERROR_CHECK(err_code);
    
        // Prepare wakeup buttons.
        err_code = bsp_btn_ble_sleep_mode_prepare();
        APP_ERROR_CHECK(err_code);
    
        // Go to system-off mode (this function will not return; wakeup will cause a reset).
        err_code = sd_power_system_off();
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for handling advertising events.
     *
     * @details This function will be called for advertising events which are passed to the application.
     *
     * @param[in] ble_adv_evt  Advertising event.
     */
    static void on_adv_evt(ble_adv_evt_t ble_adv_evt)
    {
        uint32_t err_code;
    
        switch (ble_adv_evt)
        {
            case BLE_ADV_EVT_FAST:
                err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
                APP_ERROR_CHECK(err_code);
                break;
            case BLE_ADV_EVT_IDLE:
                sleep_mode_enter();
                break;
            default:
                break;
        }
    }
    
    
    /**@brief Function for handling BLE events.
     *
     * @param[in]   p_ble_evt   Bluetooth stack event.
     * @param[in]   p_context   Unused.
     */
    static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
    {
        uint32_t err_code;
    
        switch (p_ble_evt->header.evt_id)
        {
            case BLE_GAP_EVT_CONNECTED:
                NRF_LOG_INFO("Connected");
                err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
                APP_ERROR_CHECK(err_code);
                m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
                err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, m_conn_handle);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_GAP_EVT_DISCONNECTED:
                NRF_LOG_INFO("Disconnected");
                // LED indication will be changed when advertising starts.
                m_conn_handle = BLE_CONN_HANDLE_INVALID;
                break;
    
            case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
            {
                NRF_LOG_DEBUG("PHY update request.");
                ble_gap_phys_t const phys =
                {
                    .rx_phys = BLE_GAP_PHY_AUTO,
                    .tx_phys = BLE_GAP_PHY_AUTO,
                };
                err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
                APP_ERROR_CHECK(err_code);
            } break;
    
            case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
                // Pairing not supported
                err_code = sd_ble_gap_sec_params_reply(m_conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_GATTS_EVT_SYS_ATTR_MISSING:
                // No system attributes have been stored.
                err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_GATTC_EVT_TIMEOUT:
                // Disconnect on GATT Client timeout event.
                err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
                                                 BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_GATTS_EVT_TIMEOUT:
                // Disconnect on GATT Server timeout event.
                err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
                                                 BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
                APP_ERROR_CHECK(err_code);
                break;
    
            default:
                // No implementation needed.
                break;
        }
    }
    
    
    /**@brief Function for the SoftDevice initialization.
     *
     * @details This function initializes the SoftDevice and the BLE event interrupt.
     */
    static void ble_stack_init(void)
    {
        ret_code_t err_code;
    
        err_code = nrf_sdh_enable_request();
        APP_ERROR_CHECK(err_code);
    
        // Configure the BLE stack using the default settings.
        // Fetch the start address of the application RAM.
        uint32_t ram_start = 0;
        err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
        APP_ERROR_CHECK(err_code);
    
        // Enable BLE stack.
        err_code = nrf_sdh_ble_enable(&ram_start);
        APP_ERROR_CHECK(err_code);
    
        // Register a handler for BLE events.
        NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
    }
    
    
    /**@brief Function for handling events from the GATT library. */
    void gatt_evt_handler(nrf_ble_gatt_t * p_gatt, nrf_ble_gatt_evt_t const * p_evt)
    {
        if ((m_conn_handle == p_evt->conn_handle) && (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED))
        {
            m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;
            NRF_LOG_INFO("Data len is set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len);
        }
        NRF_LOG_DEBUG("ATT MTU exchange completed. central 0x%x peripheral 0x%x",
                      p_gatt->att_mtu_desired_central,
                      p_gatt->att_mtu_desired_periph);
    }
    
    
    /**@brief Function for initializing the GATT library. */
    void gatt_init(void)
    {
        ret_code_t err_code;
    
        err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler);
        APP_ERROR_CHECK(err_code);
    
        err_code = nrf_ble_gatt_att_mtu_periph_set(&m_gatt, NRF_SDH_BLE_GATT_MAX_MTU_SIZE);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for handling events from the BSP module.
     *
     * @param[in]   event   Event generated by button press.
     */
    void bsp_event_handler(bsp_event_t event)
    {
        uint32_t err_code;
        switch (event)
        {
            case BSP_EVENT_SLEEP:
                sleep_mode_enter();
                break;
    
            case BSP_EVENT_DISCONNECT:
                err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
                if (err_code != NRF_ERROR_INVALID_STATE)
                {
                    APP_ERROR_CHECK(err_code);
                }
                break;
    
            case BSP_EVENT_WHITELIST_OFF:
                if (m_conn_handle == BLE_CONN_HANDLE_INVALID)
                {
                    err_code = ble_advertising_restart_without_whitelist(&m_advertising);
                    if (err_code != NRF_ERROR_INVALID_STATE)
                    {
                        APP_ERROR_CHECK(err_code);
                    }
                }
                break;
    
            default:
                break;
        }
    }
    
    
    /**@brief   Function for handling app_uart events.
     *
     * @details This function will receive a single character from the app_uart module and append it to
     *          a string. The string will be be sent over BLE when the last character received was a
     *          'new line' '\n' (hex 0x0A) or if the string has reached the maximum data length.
     */
    /**@snippet [Handling the data received over UART] */
    void uart_event_handle(app_uart_evt_t * p_event)
    {
        static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];
        static uint8_t index = 0;
        uint32_t       err_code;
    
        switch (p_event->evt_type)
        {
            case APP_UART_DATA_READY:
                UNUSED_VARIABLE(app_uart_get(&data_array[index]));
                index++;
    
                if ((data_array[index - 1] == '\n') || (index >= (m_ble_nus_max_data_len)))
                {
                    NRF_LOG_DEBUG("Ready to send data over BLE NUS");
                    NRF_LOG_HEXDUMP_DEBUG(data_array, index);
    
                    do
                    {
                        uint16_t length = (uint16_t)index;
                        err_code = ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);
                        if ( (err_code != NRF_ERROR_INVALID_STATE) && (err_code != NRF_ERROR_BUSY) &&
                             (err_code != NRF_ERROR_NOT_FOUND) )
                        {
                            APP_ERROR_CHECK(err_code);
                        }
                    } while (err_code == NRF_ERROR_BUSY);
    
                    index = 0;
                }
                break;
    
            case APP_UART_COMMUNICATION_ERROR:
                APP_ERROR_HANDLER(p_event->data.error_communication);
                break;
    
            case APP_UART_FIFO_ERROR:
                APP_ERROR_HANDLER(p_event->data.error_code);
                break;
    
            default:
                break;
        }
    }
    /**@snippet [Handling the data received over UART] */
    
    
    /**@brief  Function for initializing the UART module.
     */
    /**@snippet [UART Initialization] */
    static void uart_init(void)
    {
        uint32_t                     err_code;
        app_uart_comm_params_t const comm_params =
        {
            .rx_pin_no    = RX_PIN_NUMBER,
            .tx_pin_no    = TX_PIN_NUMBER,
            .rts_pin_no   = RTS_PIN_NUMBER,
            .cts_pin_no   = CTS_PIN_NUMBER,
            .flow_control = APP_UART_FLOW_CONTROL_DISABLED,
            .use_parity   = false,
    #if defined (UART_PRESENT)
            .baud_rate    = NRF_UART_BAUDRATE_115200
    #else
            .baud_rate    = NRF_UARTE_BAUDRATE_115200
    #endif
        };
    
        APP_UART_FIFO_INIT(&comm_params,
                           UART_RX_BUF_SIZE,
                           UART_TX_BUF_SIZE,
                           uart_event_handle,
                           APP_IRQ_PRIORITY_LOWEST,
                           err_code);
        APP_ERROR_CHECK(err_code);
    }
    /**@snippet [UART Initialization] */
    
    
    
    static ret_code_t service_data_set(ble_advertising_t * const p_advertising,
    				    uint8_t * service_data)	
    {
        uint8_t * p_service_data = ble_advdata_parse(p_advertising->adv_data.adv_data.p_data,
                                              p_advertising->adv_data.adv_data.len,
                                              BLE_GAP_AD_TYPE_SERVICE_DATA);
    
        if (p_service_data != NULL)
        {
            memcpy(p_service_data, service_data, p_advertising->adv_data.adv_data.len);
        }
    
        return sd_ble_gap_adv_set_configure(&p_advertising->adv_handle, &p_advertising->adv_data, &p_advertising->adv_params);
    }
    
    
    
        
    static ble_advertising_init_t 		   m_init_adv_data_and_params;
    static ble_advdata_service_data_t      m_service_data;
    uint16_t 							   m_sdata;
    static ble_uuid_t 					   m_adv_uuids[] = {{0xBEEF, BLE_UUID_TYPE_BLE}};
    static ble_gap_phys_t 				   m_phys;
    /**@brief Function for initializing the Advertising functionality.
     */
    void advertising_init(void)
    {
        uint32_t err_code;
    
        //Build and Set Service Data
        m_service_data.service_uuid       = 0xBAAD;
        m_service_data.data.size          = 2;
    
    //    m_sdata                           = get_new_advertising_data();
        m_service_data.data.p_data        = "Mart";//(uint8_t*)&m_sdata;
    
    
        memset(&m_init_adv_data_and_params, 0, sizeof(m_init_adv_data_and_params));
    
        //Build and Set Advertising Data.
        m_init_adv_data_and_params.advdata.flags                        = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
        m_init_adv_data_and_params.advdata.name_type                    = BLE_ADVDATA_FULL_NAME;
        m_init_adv_data_and_params.advdata.include_appearance           = false;
    
        m_init_adv_data_and_params.advdata.uuids_complete.uuid_cnt       = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
        m_init_adv_data_and_params.advdata.uuids_complete.p_uuids        = m_adv_uuids;
        m_init_adv_data_and_params.advdata.p_service_data_array          = &m_service_data;
        m_init_adv_data_and_params.advdata.service_data_count            = 1;
    
        //Build and Set Advertising Params.
        m_init_adv_data_and_params.config.ble_adv_whitelist_enabled      = true;
        m_init_adv_data_and_params.config.ble_adv_fast_enabled           = true;
        m_init_adv_data_and_params.config.ble_adv_fast_interval          = APP_ADV_INTERVAL;
        m_init_adv_data_and_params.config.ble_adv_fast_timeout           = APP_ADV_DURATION;
        m_init_adv_data_and_params.config.ble_adv_slow_enabled           = true;
        m_init_adv_data_and_params.config.ble_adv_slow_interval          = APP_ADV_INTERVAL;
        m_init_adv_data_and_params.config.ble_adv_slow_timeout           = APP_ADV_DURATION;
        m_init_adv_data_and_params.config.ble_adv_primary_phy            = BLE_GAP_PHY_1MBPS;
        m_init_adv_data_and_params.config.ble_adv_secondary_phy          = BLE_GAP_PHY_1MBPS;
    
    
        err_code = ble_advertising_init(&m_advertising, &m_init_adv_data_and_params);
        APP_ERROR_CHECK(err_code);
    
        ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
    }
    
    /**@brief Function for initializing buttons and leds.
     *
     * @param[out] p_erase_bonds  Will be true if the clear bonding button was pressed to wake the application up.
     */
    static void buttons_leds_init(bool * p_erase_bonds)
    {
        bsp_event_t startup_event;
    
        uint32_t err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
        APP_ERROR_CHECK(err_code);
    
        err_code = bsp_btn_ble_init(NULL, &startup_event);
        APP_ERROR_CHECK(err_code);
    
        *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
    }
    
    
    /**@brief Function for initializing the nrf log module.
     */
    static void log_init(void)
    {
        ret_code_t err_code = NRF_LOG_INIT(NULL);
        APP_ERROR_CHECK(err_code);
    
        NRF_LOG_DEFAULT_BACKENDS_INIT();
    }
    
    
    /**@brief Function for initializing power management.
     */
    static void power_management_init(void)
    {
        ret_code_t err_code;
        err_code = nrf_pwr_mgmt_init();
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for handling the idle state (main loop).
     *
     * @details If there is no pending log operation, then sleep until next the next event occurs.
     */
    static void idle_state_handle(void)
    {
        UNUSED_RETURN_VALUE(NRF_LOG_PROCESS());
        nrf_pwr_mgmt_run();
    }
    
    
    /**@brief Function for starting advertising.
     */
    static void advertising_start(void)
    {
        uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
        APP_ERROR_CHECK(err_code);
    }
    
    ret_code_t sdata_set(ble_advertising_t * const p_advertising, uint16_t sdata)
    {
        uint8_t * p_sdata = ble_advdata_parse(p_advertising->adv_data.adv_data.p_data,
    				      p_advertising->adv_data.adv_data.len,
    				      BLE_GAP_AD_TYPE_SERVICE_DATA);
    
        if (p_sdata != NULL)
        {
    	*p_sdata = sdata;
    	NRF_LOG_ERROR("SData at address 0x%X", p_sdata);
    	uint16_t offset = 0;
    	ble_advdata_search(p_advertising->adv_data.adv_data.p_data, BLE_GAP_ADV_SET_DATA_SIZE_MAX, &offset, BLE_GAP_AD_TYPE_SERVICE_DATA);
    	NRF_LOG_INFO("OFFSET: %d", offset);
        }
        else //Debug
        {
    	NRF_LOG_ERROR("No SData!");
        }
    
        return sd_ble_gap_adv_set_configure(&p_advertising->adv_handle, &p_advertising->adv_data, &p_advertising->adv_params);
    }
    
    /**@brief Application main function.
     */
    int main(void)
    {
        bool erase_bonds;
    
        // Initialize.
        uart_init();
        log_init();
        timers_init();
        buttons_leds_init(&erase_bonds);
        power_management_init();
        ble_stack_init();
        gap_params_init();
        gatt_init();
        services_init();
        advertising_init();
        conn_params_init();
    
        // Start execution.
        printf("\r\nUART started.\r\n");
        NRF_LOG_INFO("Debug logging for UART over RTT started.");
        advertising_start();
    
        
    				
        // Enter main loop.
        for (;;)
        {
    //        idle_state_handle();
    	nrf_delay_ms(1000);
    	sdata_set(&m_advertising, 0xC0FE);
    	NRF_LOG_FLUSH();
        }
    }
    
    
    /**
     * @}
     */
    

  • Hi Martin,

    I tried to import your sdata_set function and it results the same => offset is always zero and thus p_sdata is never different than NULL.

    I checked p_advertising->adv_data.adv_data.len and it is always 31.

    Do you have any idea what might be the problem?

    Thanks,

    João

  • That is strange.

    1. What SDK version are you using?
    2. Can you share your entire project? We can make the case private if you prefer confidentiality. 
  • Hi Martin,

    It seems that I had an issue with p_advertising->adv_data.adv_data.len indeed, which was getting unintentionally altered and reading the ServiceData "out of range".

    It is now working but I'm struggling with the NRF_ERROR_INVALID_STATE with sd_ble_gap_adv_set_configure. According to the documentation, "It is invalid to provide the same data buffers while advertising. To update advertising data, provide new advertising buffers."

    I try to contour the issue with the code in attachment but still retrieve the same error. Any ideas to solve it?

     

    I'm using SDK15 and Softdevice6.0.0

    Thank you,

    João

    ret_code_t sdata_set(ble_advertising_t * const p_advertising, uint16_t sdata)
    {
        uint32_t ret;
        
        uint8_t * p_sdata = ble_advdata_parse(p_advertising->adv_data.adv_data.p_data,
    				      p_advertising->adv_data.adv_data.len,
    				      BLE_GAP_AD_TYPE_SERVICE_DATA);
        
        uint16_t offset = 0;
        if (p_sdata != NULL)
        {
    			*p_sdata = sdata;
    
    			ble_advdata_search(p_advertising->adv_data.adv_data.p_data, BLE_GAP_ADV_SET_DATA_SIZE_MAX, &offset, BLE_GAP_AD_TYPE_SERVICE_DATA);
    			
            	offset+=2; //To get the data itself			
    			p_advertising->adv_data.adv_data.p_data[offset++] = MSB_16(sdata);
            	p_advertising->adv_data.adv_data.p_data[offset++] = LSB_16(sdata);
        }
        else //Debug
        {
    			NRF_LOG_ERROR("No SData!");
        }
        
    
        if(m_advdata_idx % 2 == 0)
        {
                memcpy(m_new_enc_advdata1, p_advertising->adv_data.adv_data.p_data, p_advertising->adv_data.adv_data.len);
                m_new_adv_data.adv_data.p_data      = m_new_enc_advdata1;
                m_new_adv_data.adv_data.len         = p_advertising->adv_data.adv_data.len;
    
                m_new_adv_data.scan_rsp_data.p_data = p_advertising->enc_scan_rsp_data;
                m_new_adv_data.scan_rsp_data.len    = p_advertising->adv_data.scan_rsp_data.len;
        }
        else
        {
                memcpy(m_new_enc_advdata2, p_advertising->adv_data.adv_data.p_data, p_advertising->adv_data.adv_data.len);
                m_new_adv_data.adv_data.p_data      = m_new_enc_advdata2;
                m_new_adv_data.adv_data.len         = p_advertising->adv_data.adv_data.len;
    
                m_new_adv_data.scan_rsp_data.p_data = p_advertising->enc_scan_rsp_data;
                m_new_adv_data.scan_rsp_data.len    = p_advertising->adv_data.scan_rsp_data.len;
        }
    
        m_advdata_idx++;
    
        memcpy(&p_advertising->adv_data, &m_new_adv_data, sizeof(p_advertising->adv_data));
        p_advertising->p_adv_data = &p_advertising->adv_data;
    
        ret = sd_ble_gap_adv_set_configure(&p_advertising->adv_handle, &p_advertising->adv_data, &p_advertising->adv_params);
    
        return ret;
    }

Reply
  • Hi Martin,

    It seems that I had an issue with p_advertising->adv_data.adv_data.len indeed, which was getting unintentionally altered and reading the ServiceData "out of range".

    It is now working but I'm struggling with the NRF_ERROR_INVALID_STATE with sd_ble_gap_adv_set_configure. According to the documentation, "It is invalid to provide the same data buffers while advertising. To update advertising data, provide new advertising buffers."

    I try to contour the issue with the code in attachment but still retrieve the same error. Any ideas to solve it?

     

    I'm using SDK15 and Softdevice6.0.0

    Thank you,

    João

    ret_code_t sdata_set(ble_advertising_t * const p_advertising, uint16_t sdata)
    {
        uint32_t ret;
        
        uint8_t * p_sdata = ble_advdata_parse(p_advertising->adv_data.adv_data.p_data,
    				      p_advertising->adv_data.adv_data.len,
    				      BLE_GAP_AD_TYPE_SERVICE_DATA);
        
        uint16_t offset = 0;
        if (p_sdata != NULL)
        {
    			*p_sdata = sdata;
    
    			ble_advdata_search(p_advertising->adv_data.adv_data.p_data, BLE_GAP_ADV_SET_DATA_SIZE_MAX, &offset, BLE_GAP_AD_TYPE_SERVICE_DATA);
    			
            	offset+=2; //To get the data itself			
    			p_advertising->adv_data.adv_data.p_data[offset++] = MSB_16(sdata);
            	p_advertising->adv_data.adv_data.p_data[offset++] = LSB_16(sdata);
        }
        else //Debug
        {
    			NRF_LOG_ERROR("No SData!");
        }
        
    
        if(m_advdata_idx % 2 == 0)
        {
                memcpy(m_new_enc_advdata1, p_advertising->adv_data.adv_data.p_data, p_advertising->adv_data.adv_data.len);
                m_new_adv_data.adv_data.p_data      = m_new_enc_advdata1;
                m_new_adv_data.adv_data.len         = p_advertising->adv_data.adv_data.len;
    
                m_new_adv_data.scan_rsp_data.p_data = p_advertising->enc_scan_rsp_data;
                m_new_adv_data.scan_rsp_data.len    = p_advertising->adv_data.scan_rsp_data.len;
        }
        else
        {
                memcpy(m_new_enc_advdata2, p_advertising->adv_data.adv_data.p_data, p_advertising->adv_data.adv_data.len);
                m_new_adv_data.adv_data.p_data      = m_new_enc_advdata2;
                m_new_adv_data.adv_data.len         = p_advertising->adv_data.adv_data.len;
    
                m_new_adv_data.scan_rsp_data.p_data = p_advertising->enc_scan_rsp_data;
                m_new_adv_data.scan_rsp_data.len    = p_advertising->adv_data.scan_rsp_data.len;
        }
    
        m_advdata_idx++;
    
        memcpy(&p_advertising->adv_data, &m_new_adv_data, sizeof(p_advertising->adv_data));
        p_advertising->p_adv_data = &p_advertising->adv_data;
    
        ret = sd_ble_gap_adv_set_configure(&p_advertising->adv_handle, &p_advertising->adv_data, &p_advertising->adv_params);
    
        return ret;
    }

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