nRf52832 device name change by using mobile app

[Nordic_partv_]

Hi,

I need to change the Device name in nRf52832. Mobile app sends the request to nRf52832. 

Thanks.

static void ChangeDeviceName(void)
{
        uint32_t err_code;
        ble_gap_conn_sec_mode_t sec_mode;
        ble_gap_conn_params_t gap_conn_params;
        BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
        static uint8_t index = 0;

        advertising_stop();

        //sprintf(Devicename3, "HUAWEI_DEVICE %d", index);
        index++;
        err_code = sd_ble_gap_device_name_set(&sec_mode,
                                              (uint8_t *) Devicename3,
                                              strlen(Devicename3));

        NRF_LOG_INFO("device name error %d", err_code);
        APP_ERROR_CHECK(err_code);
}

[Nordic_partv_]

#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 "peer_manager.h"
#include "peer_manager_handler.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_power.h"
#include "nrf_dfu_ble_svci_bond_sharing.h"
#include "nrf_svci_async_function.h"
#include "nrf_svci_async_handler.h"
#include "ble_dfu.h"
#include "nrf_bootloader_info.h"

#include "uicr_config.h"
#include <stdbool.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                     "AMANDA_DFU"                               /**< 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. */

#define SEC_PARAM_BOND                  1                                           /**< Perform bonding. */
#define SEC_PARAM_MITM                  0                                           /**< Man In The Middle protection not required. */
#define SEC_PARAM_LESC                  0                                           /**< LE Secure Connections not enabled. */
#define SEC_PARAM_KEYPRESS              0                                           /**< Keypress notifications not enabled. */
#define SEC_PARAM_IO_CAPABILITIES       BLE_GAP_IO_CAPS_NONE                        /**< No I/O capabilities. */
#define SEC_PARAM_OOB                   0                                           /**< Out Of Band data not available. */
#define SEC_PARAM_MIN_KEY_SIZE          7                                           /**< Minimum encryption key size. */
#define SEC_PARAM_MAX_KEY_SIZE          16                                          /**< Maximum encryption key size. */

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 void ble_dfu_buttonless_evt_handler(ble_dfu_buttonless_evt_type_t event);

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}
};

uint8_t AMANDA_NAME[20];
char Devicename_str[20];
char Devicename2[20];
char set_devicename_flag = 0,set_advstart_flag=0;
char dest_data_0[48];
char retval = 0; 
char Devicename3[10] = "MemsTech"; 
static bool m_advertising_is_ongoing = false;

typedef enum
{
        BLE_FLASH_EVT_DEV_NAME = 0,
        BLE_FLASH_EVT_MAC_ADDRESS,
} ble_device_flash_evt_type_t;
#define MANUF_PAYLOAD_1                 0x4E    // N
#define MANUF_PAYLOAD_2                 0x4F    // O
#define MANUF_PAYLOAD_3                 0x52    // R
#define MANUF_PAYLOAD_4                 0x44    // D
#define MANUF_PAYLOAD_5                 0x49    // I
#define MANUF_PAYLOAD_6                 0x43    // C
#define PAYLOAD_SIZE                    1
#define TOP_INDEX                       5

#define APP_COMPANY_IDENTIFIER          0x0059                                  /**< Company identifier for Nordic Semiconductor ASA. as per www.bluetooth.org. */
  
static ble_advdata_t                    new_advdata;
static uint8_t manufacturing_data_payload_list [] =
{
    MANUF_PAYLOAD_1,
    MANUF_PAYLOAD_2,
    MANUF_PAYLOAD_3,
    MANUF_PAYLOAD_4,
    MANUF_PAYLOAD_5,
    MANUF_PAYLOAD_6
};  


void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
{
    app_error_handler(DEAD_BEEF, line_num, p_file_name);
}

static void pm_evt_handler(pm_evt_t const * p_evt)
{
    pm_handler_on_pm_evt(p_evt);
    pm_handler_flash_clean(p_evt);
}
/**@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++)
        {
            Devicename_str[i]=p_evt->params.rx_data.p_data[i];
            if(Devicename_str[0]=='s' && Devicename_str[1]=='e' && Devicename_str[2]=='t')
            {
                set_devicename_flag = 1;
            }
            else if(Devicename_str[0]=='s' && Devicename_str[1]=='t' && Devicename_str[2]=='a' && Devicename_str[2]=='r' && Devicename_str[2]=='t')
            {
                set_advstart_flag = 1;
            }
            else if(Devicename_str[0]!='s' && Devicename_str[1]!='e' && Devicename_str[2]!='t')
            {
                memset(Devicename_str, '\0', sizeof(Devicename_str));
            }
            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};
   // ble_dfu_buttonless_init_t dfus_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);

    ble_dfu_buttonless_init_t dfus_init =
    {
    .evt_handler = ble_dfu_buttonless_evt_handler
    };
    err_code = ble_dfu_buttonless_init(&dfus_init);
    APP_ERROR_CHECK(err_code);
    // END Block Added for DFU
}


/**@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;
    uint8_t compare = 0xFF;
    uint8_t send_data = 1;
    char stop_arr[13] = "stop_ble\n";
    char start_arr[13] = "start_ble\n";
    switch (p_event->evt_type)
    {
        case APP_UART_DATA_READY:
            UNUSED_VARIABLE(app_uart_get(&data_array[index]));
            index++;
            if (data_array[0] != 's')
            {
                index = 0;
            }
            if ((data_array[index - 1] == '\n') ||
                (data_array[index - 1] == '\r') ||
                (index >= m_ble_nus_max_data_len))
            {
                if (index > 1)
                {
                    /*NRF_LOG_DEBUG("Ready to send data over BLE NUS");
                    NRF_LOG_HEXDUMP_DEBUG(data_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_RESOURCES) &&
                            (err_code != NRF_ERROR_NOT_FOUND))
                        {
                            APP_ERROR_CHECK(err_code);
                        }
                    } while (err_code == NRF_ERROR_RESOURCES);*/
                     compare = strcmp(data_array,stop_arr);
                     NRF_LOG_INFO(data_array);
                     if(compare == 0)
                     {
                        (void) sd_ble_gap_adv_stop(m_advertising.adv_handle);
                        memset(data_array, 0, sizeof(data_array));
                        send_data = 0;
                     }
                     compare = strcmp(data_array,start_arr);
                     if(compare == 0)
                     {
                        //uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
                        //advertising_start();
                        //gap_params_init();
                       // gatt_init();
                        //services_init();
                        //advertising_init();
                        //conn_params_init();
                        ble_advertising_restart_without_whitelist(&m_advertising);
                        memset(data_array, 0, sizeof(data_array));
                        //APP_ERROR_CHECK(err_code);
                        err_code =0;
                        send_data = 1;
                     }
                }

                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] */


/**@brief Function for initializing the Advertising functionality.
 */
static void advertising_init(void)
{
    uint32_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 = false;
    init.advdata.flags              = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;

    init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
    init.srdata.uuids_complete.p_uuids  = m_adv_uuids;

    init.config.ble_adv_fast_enabled  = true;
    init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
    init.config.ble_adv_fast_timeout  = APP_ADV_DURATION;
    init.evt_handler = on_adv_evt;

    err_code = ble_advertising_init(&m_advertising, &init);
    APP_ERROR_CHECK(err_code);

    ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
}


/**@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)
{
    if (NRF_LOG_PROCESS() == false)
    {
        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);
}

static void ble_dfu_buttonless_evt_handler(ble_dfu_buttonless_evt_type_t event)
{
    switch (event)
    {
        case BLE_DFU_EVT_BOOTLOADER_ENTER_PREPARE:
            NRF_LOG_INFO("Device is preparing to enter bootloader mode\r\n");
            break;
        
        case BLE_DFU_EVT_BOOTLOADER_ENTER:
            NRF_LOG_INFO("Device will enter bootloader mode\r\n");
            break;
        
        case BLE_DFU_EVT_BOOTLOADER_ENTER_FAILED:
            NRF_LOG_ERROR("Device will enter bootloader mode\r\n");
            break;
        default:
            NRF_LOG_INFO("Unknown event from ble_dfu.\r\n");
            break;
    }
}

static bool app_shutdown_handler(nrf_pwr_mgmt_evt_t event)
{
    switch (event)
    {
        case NRF_PWR_MGMT_EVT_PREPARE_DFU:
            NRF_LOG_INFO("Power management wants to reset to DFU mode\r\n");    
            // Change this code to tailor to your reset strategy.
            // Returning false here means that the device is not ready to jump to DFU mode yet.
            // 
            // Here is an example using a variable to delay resetting the device:
          /*  if (!m_ready_for_reset)
            {
                 return false;
            }
            break;*/
        
        default:
            // Implement any of the other events available from the power management module:
            //      -NRF_PWR_MGMT_EVT_PREPARE_SYSOFF
            //      -NRF_PWR_MGMT_EVT_PREPARE_WAKEUP
            //      -NRF_PWR_MGMT_EVT_PREPARE_RESET
            return true;
    }
    NRF_LOG_INFO("Power management allowed to reset to DFU mode\r\n");
    return true;
}
NRF_PWR_MGMT_HANDLER_REGISTER(app_shutdown_handler, 0);

/* This function will update the device name and advertising data accordingly. */
/*void change_ble_device_name(uint8_t *device_name)
{
    ble_gap_conn_sec_mode_t sec_mode;
    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
    //uint32_t               err_code;
    ble_advertising_init_t init;

    /* Change device name */
   /* uint32_t err_code = sd_ble_gap_device_name_set(&sec_mode,
                                           (uint8_t *) Devicename2,
                                          strlen(Devicename2));
    APP_ERROR_CHECK(err_code);

    /* Store Current connection state od adv lib */
    /*uint16_t m_adv_current_slave_link_conn_handle_saved = m_advertising.current_slave_link_conn_handle;

    /* Re-initialize advertising module */
    //advertising_init();
    /*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);
    /* Re-store Current connection state lib */
    /*m_advertising.current_slave_link_conn_handle = m_adv_current_slave_link_conn_handle_saved;
}*/

static void advertising_stop(void)
{
        ret_code_t err_code;
        if (m_advertising_is_ongoing == true)
        {
                err_code = sd_ble_gap_adv_stop(m_advertising.adv_handle);
                APP_ERROR_CHECK(err_code);

                m_advertising_is_ongoing = false;
                NRF_LOG_INFO("Advertising Stop");
        }
}

static void ChangeDeviceName(void)
{
        uint32_t err_code;
        ble_gap_conn_sec_mode_t sec_mode;
        ble_gap_conn_params_t gap_conn_params;
        BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
        ble_advdata_manuf_data_t    manuf_data;
        new_advdata.p_manuf_specific_data = &manuf_data;
        
        static uint8_t index = 0;
        static uint8_t payload_index = 0;

        advertising_stop();

        //sprintf(Devicename3, "HUAWEI_DEVICE %d", index);
        index++;
        err_code = sd_ble_gap_device_name_set(&sec_mode,
                                              (uint8_t *) Devicename2,
                                              strlen(Devicename2));

        NRF_LOG_INFO("device name error %d", err_code);
        APP_ERROR_CHECK(err_code);
        
        manuf_data.company_identifier = APP_COMPANY_IDENTIFIER;

        manuf_data.data.p_data = manufacturing_data_payload_list + payload_index;
        manuf_data.data.size = PAYLOAD_SIZE;
        
        err_code = ble_advertising_advdata_update(&m_advertising, &new_advdata, NULL);
        APP_ERROR_CHECK(err_code);  
        if(payload_index == TOP_INDEX)
        {
            payload_index = 0;
        }
        else
        {
            payload_index++;
        }
        //advertising_init();
        
        //err_code = app_sched_event_put(NULL, 0, advertising_start);
        //APP_ERROR_CHECK(err_code);

}
//BLE_ADVERTISING_DEF(m_advertising);
static ble_advertising_init_t adv_init;

/* This function will update the device name and advertising data accordingly. */
void bluetooth_update_name(uint8_t* name) {
	ret_code_t err_code;
	ble_gap_conn_sec_mode_t sec_mode;

	BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM(&sec_mode);

        err_code = sd_ble_gap_adv_stop(m_advertising.adv_handle);
        //APP_ERROR_CHECK(err_code);
        
        ble_advertising_restart_without_whitelist(&m_advertising);
	//if (current_config.name[0] != '\0') {
//		err_code = sd_ble_gap_device_name_set(&sec_mode, name, strnlen(name, 10));
	//	APP_ERROR_CHECK(err_code);
//	}
//	else {
		err_code = sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *)Devicename2, strlen(Devicename2));
		APP_ERROR_CHECK(err_code);
//	}


  //sd_ble_gap_adv_stop(&m_advertising.adv_handle);

	err_code = ble_advdata_encode(&adv_init.advdata, m_advertising.enc_advdata, &m_advertising.adv_data.adv_data.len);
	//VERIFY_SUCCESS(err_code);

	if (m_advertising.adv_modes_config.ble_adv_extended_enabled == true)
	{
#ifdef BLE_GAP_ADV_SET_DATA_SIZE_EXTENDED_CONNECTABLE_MAX_SUPPORTED
		m_advertising.adv_data.scan_rsp_data.len = BLE_GAP_ADV_SET_DATA_SIZE_EXTENDED_CONNECTABLE_MAX_SUPPORTED;
#else
		m_advertising.adv_data.scan_rsp_data.len = BLE_GAP_ADV_SET_DATA_SIZE_MAX;
#endif // BLE_GAP_ADV_SET_DATA_SIZE_EXTENDED_CONNECTABLE_MAX_SUPPORTED
	}
	else
	{
		m_advertising.adv_data.scan_rsp_data.len = BLE_GAP_ADV_SET_DATA_SIZE_MAX;
	}

	err_code = ble_advdata_encode(&adv_init.srdata,
		m_advertising.adv_data.scan_rsp_data.p_data,
		&m_advertising.adv_data.scan_rsp_data.len);

	sd_ble_gap_adv_set_configure(&m_advertising.adv_handle,
		m_advertising.p_adv_data,
		NULL);
        ble_advertising_restart_without_whitelist(&m_advertising);
                 
}


int main(void)
{
    bool erase_bonds;
    
    // Initialize.
    uart_init();
    log_init();
    //err_code = ble_dfu_buttonless_async_svci_init();
   // APP_ERROR_CHECK(err_code);
    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();
        if(set_devicename_flag == 1)
        {
            NRF_LOG_INFO("set received");
            set_devicename_flag = 0; 
            for(int i=0; i< 15; i++)
            {
              Devicename2[i] = Devicename_str[i+4];
            }
            NRF_LOG_INFO("%s",NRF_LOG_PUSH(Devicename2));
            //setGapDeviceName(Devicename2);
            //change_ble_device_name(Devicename2);
            NRF_LOG_INFO("Change device name");
            //advertising_stop();
            ChangeDeviceName();
            

            //bluetooth_update_name(Devicename2);
            memset(Devicename_str, '\0', sizeof(Devicename_str));

            //device_flash_update_evt_handler(BLE_FLASH_EVT_DEV_NAME, Devicename2, sizeof(Devicename2));
            //ble_advertising_restart_without_whitelist(&m_advertising);
        }
        if(set_advstart_flag == 1)
        {
          set_advstart_flag = 0; 
          //Readvertising_start();
          memset(Devicename_str, '\0', sizeof(Devicename_str));
        }
    }
}

/**
 * @}
 */

Check this code

[Amanda Hsieh]

Hi, 

As I suggest in the first reply, it should call ble_advertising_advdata_update() with the same 'srdata' and 'advata' arguments that were used in advertising_init(). This process will update your adv. payload with the new GAP device name. Here is a simple example.

static void ChangeDeviceName(void)
{
        uint32_t err_code;
        ble_gap_conn_sec_mode_t sec_mode;
        ble_gap_conn_params_t gap_conn_params;
        BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
        static uint8_t index = 0;
        char Devicename3[]="Nordic";

        advertising_stop();

       
       
        err_code = sd_ble_gap_device_name_set(&sec_mode,
                                              (uint8_t *) Devicename3,
                                              strlen(Devicename3));

        NRF_LOG_INFO("device name error %d", err_code);
        APP_ERROR_CHECK(err_code);

        err_code = ble_advertising_advdata_update(&m_advertising, &adv_init.advdata, &adv_init.srdata);
        APP_ERROR_CHECK(err_code);  

        NRF_LOG_INFO("Update device name: %s", Devicename3);

}

You can put ble_app_template_274738_change_device_name.zip under nRF5_SDK_17.0.2_d674dde\examples\ble_peripheral to test. 

-Amanda H.