Advertising doesn't change name after code update

Greetings,

I've been developing a DFU firmware that should update the device through Android. The thing is, the device works, but I changed the advertising name, and it still shows the old name when I try to update the device. I use the following function to update the name:

static void make_dev_name(void)
{
    ble_gap_addr_t device_address;
    uint8_t companyName[] = {"M"};
    uint8_t modelName[] = {"1"};
    uint8_t *macAddressName;
    uint8_t macTmp[12];

    sd_ble_gap_addr_get(&device_address);
    macAddressName = Convert_Hex_To_Ascii(&device_address.addr[0], 4);
    memcpy(&DEVICE_NAME[0], companyName, 1);
    memcpy(&DEVICE_NAME[1], modelName, 1);
    memcpy(&DEVICE_NAME[2], macAddressName, 12);

}

Any idea why this issue occurs?

I used reference from here;
https://novelbits.io/ota-device-firmware-update-part-3/

Parents
  • Hello,

    When is make_dev_name() called, is it only on startup, or are you sending a command over BLE to update the name? 

    Best regards,

    Vidar

  • Only on start-up.

    int main(void)
    {
        bool erase_bonds;
        ret_code_t err_code;
        ble_gap_addr_t device_address;
        
        // Comment this for new modules
        sd_power_dcdc_mode_set(1);
    
        // Initialize.
        uart_init();
        log_init();
    
        // Initialize the async SVCI interface to bootloader before any interrupts are enabled.
        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();
    
        make_dev_name();
    
        gap_params_init();
        gatt_init();
        services_init();
        advertising_init();
        conn_params_init();
    
        //if(nrf_gpio_pin_read(WAKEUP_IN_PIN))
        //{
        //    while(1);   // wait here 
        //}
    
        sd_ble_gap_addr_get(&device_address);
        nrf_delay_ms(5);
        while(!nrf_gpio_pin_read(WAKEUP_IN_PIN))
        {
            //nrf_gpio_pin_clear(UART_TX_NOTIFY);
            //nrf_delay_ms(250);
            //nrf_gpio_pin_set(UART_TX_NOTIFY);
            for(int i=0; i<6; i++)
            {
                do
                {
                    err_code = app_uart_put(device_address.addr[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);
                
            }
            //nrf_delay_ms(500);
            nrf_delay_ms(50);
        }
    
        // Start execution.
        //printf("\r\nApplication started.\r\n");
        NRF_LOG_INFO("Debug logging for UART over RTT started.");
        while(app_uart_tx_done());
        app_uart_close();
        advertising_start();
    
        wdt_init();
    
        // Enter main loop.
        for (;;)
        {
            // Feed the watchdog
            feed_dog();
            // Power management 
            idle_state_handle();
    
        }
    }

  • Thanks for confirming. But I can't tell from the snippet you posted where DEVICE_NAME is referenced. Could you post your main.c file here?

  • Device name is referenced as uint8_t array

    /** @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 "main.h"
    #include "nordic_common.h"
    #include "nrf.h"
    #include "ble_hci.h"
    #include "ble_advdata.h"
    #include "ble_advertising.h"
    #include "ble_conn_params.h"
    #include "nrf_sdh.h"
    #include "nrf_sdh_soc.h"
    #include "nrf_sdh_ble.h"
    #include "nrf_ble_gatt.h"
    #include "nrf_ble_qwr.h"
    #include "app_timer.h"
    #include "ble_nus.h"
    #include "app_uart.h"
    #include "app_util_platform.h"
    #include "bsp_btn_ble.h"
    #include "nrf_pwr_mgmt.h"
    
    #if defined (UART_PRESENT)
    #include "nrf_uart.h"
    #endif
    #if defined (UARTE_PRESENT)
    #include "nrf_uarte.h"
    #endif
    
    #include "nrf_log.h"
    #include "nrf_log_ctrl.h"
    #include "nrf_log_default_backends.h"
    #include "nrf_gpio.h"
    #include "nrf_delay.h"  
    #include "nrf_drv_wdt.h"
    #include "nrf_drv_clock.h"
    
    // BEGIN Block Added for DFU
    #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"
    // END Block Added for DFU
    
    
    #define WAKEUP_IN_PIN   NRF_GPIO_PIN_MAP(0,4)               // Check this pin if need to send MAC
    static void uart_init(void);
    
    
    #define APP_BLE_CONN_CFG_TAG            1                                           /**< A tag identifying the SoftDevice BLE configuration. */
    
    uint8_t DEVICE_NAME[29];
    //#define DEVICE_NAME                     "M1"                                   /**< 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                MSEC_TO_UNITS(500, UNIT_0_625_MS)            /**< 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(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. */
    APP_TIMER_DEF(m_inactivity_timer_id);                                               // Define the timer 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}
    };
    
    //*************** DFU START     *********************************************
    
    
    /**@brief Handler for shutdown preparation.
     *
     * @details During shutdown procedures, this function will be called at a 1 second interval
     *          untill the function returns true. When the function returns true, it means that the
     *          app is ready to reset to DFU mode.
     *
     * @param[in]   event   Power manager event.
     *
     * @retval  True if shutdown is allowed by this power manager handler, otherwise false.
     */
    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.");
                // YOUR_JOB: Get ready to reset into DFU mode
                //
                // If you aren't finished with any ongoing tasks, return "false" to
                // signal to the system that reset is impossible at this stage.
                //
                // Here is an example using a variable to delay resetting the device.
                //
                // if (!m_ready_for_reset)
                // {
                //      return false;
                // }
                // else
                //{
                //
                //    // Device ready to enter
                //    uint32_t err_code;
                //    err_code = sd_softdevice_disable();
                //    APP_ERROR_CHECK(err_code);
                //    err_code = app_timer_stop_all();
                //    APP_ERROR_CHECK(err_code);
                //}
                break;
    
            default:
                // YOUR_JOB: 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.");
        return true;
    }
    
    //lint -esym(528, m_app_shutdown_handler)
    /**@brief Register application shutdown handler with priority 0.
     */
    NRF_PWR_MGMT_HANDLER_REGISTER(app_shutdown_handler, 0);
    
    
    static void buttonless_dfu_sdh_state_observer(nrf_sdh_state_evt_t state, void * p_context)
    {
        if (state == NRF_SDH_EVT_STATE_DISABLED)
        {
            // Softdevice was disabled before going into reset. Inform bootloader to skip CRC on next boot.
            nrf_power_gpregret2_set(BOOTLOADER_DFU_SKIP_CRC);
    
            //Go to system off.
            nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_SYSOFF);
        }
    }
    
    /* nrf_sdh state observer. */
    NRF_SDH_STATE_OBSERVER(m_buttonless_dfu_state_obs, 0) =
    {
        .handler = buttonless_dfu_sdh_state_observer,
    };
    
    
    static void advertising_config_get(ble_adv_modes_config_t * p_config)
    {
        memset(p_config, 0, sizeof(ble_adv_modes_config_t));
    
        p_config->ble_adv_fast_enabled  = true;
        p_config->ble_adv_fast_interval = APP_ADV_INTERVAL;
        p_config->ble_adv_fast_timeout  = APP_ADV_DURATION;
    }
    
    static void disconnect(uint16_t conn_handle, void * p_context)
    {
        UNUSED_PARAMETER(p_context);
    
        ret_code_t err_code = sd_ble_gap_disconnect(conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
        if (err_code != NRF_SUCCESS)
        {
            NRF_LOG_WARNING("Failed to disconnect connection. Connection handle: %d Error: %d", conn_handle, err_code);
        }
        else
        {
            NRF_LOG_DEBUG("Disconnected connection handle %d", conn_handle);
        }
    }
    
    // YOUR_JOB: Update this code if you want to do anything given a DFU event (optional).
    /**@brief Function for handling dfu events from the Buttonless Secure DFU service
     *
     * @param[in]   event   Event from the Buttonless Secure DFU service.
     */
    static void ble_dfu_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.");
    
                // Prevent device from advertising on disconnect.
                ble_adv_modes_config_t config;
                advertising_config_get(&config);
                config.ble_adv_on_disconnect_disabled = true;
                ble_advertising_modes_config_set(&m_advertising, &config);
    
                // Disconnect all other bonded devices that currently are connected.
                // This is required to receive a service changed indication
                // on bootup after a successful (or aborted) Device Firmware Update.
                uint32_t conn_count = ble_conn_state_for_each_connected(disconnect, NULL);
                NRF_LOG_INFO("Disconnected %d links.", conn_count);
                break;
            }
    
            case BLE_DFU_EVT_BOOTLOADER_ENTER:
                // YOUR_JOB: Write app-specific unwritten data to FLASH, control finalization of this
                //           by delaying reset by reporting false in app_shutdown_handler
                NRF_LOG_INFO("Device will enter bootloader mode.");
                break;
    
            case BLE_DFU_EVT_BOOTLOADER_ENTER_FAILED:
                NRF_LOG_ERROR("Request to enter bootloader mode failed asynchroneously.");
                // YOUR_JOB: Take corrective measures to resolve the issue
                //           like calling APP_ERROR_CHECK to reset the device.
                break;
    
            case BLE_DFU_EVT_RESPONSE_SEND_ERROR:
                NRF_LOG_ERROR("Request to send a response to client failed.");
                // YOUR_JOB: Take corrective measures to resolve the issue
                //           like calling APP_ERROR_CHECK to reset the device.
                APP_ERROR_CHECK(false);
                break;
    
            default:
                NRF_LOG_ERROR("Unknown event from ble_dfu_buttonless.");
                break;
        }
    }
    
    //*************** DFU END       **********************************************
    
    // Watch Dog enable
    nrfx_wdt_channel_id m_channel_id;
    
    void wdt_event_handler(void)
    {
        NRF_LOG_INFO("%s", __func__);
        while (NRF_LOG_PROCESS());
        NRF_LOG_FINAL_FLUSH();
    }
    
    void feed_dog(void)
    {
         nrf_drv_wdt_channel_feed(m_channel_id);
    }
    
    void wdt_init(void)
    {
        //2 sec timeout
        uint32_t err_code = NRF_SUCCESS;
        nrfx_wdt_config_t wdt_config = NRFX_WDT_DEAFULT_CONFIG;
    
        err_code = nrfx_wdt_init(&wdt_config, wdt_event_handler);
        APP_ERROR_CHECK(err_code);
    
        err_code = nrfx_wdt_channel_alloc(&m_channel_id);
        APP_ERROR_CHECK(err_code);
    
        nrfx_wdt_enable();
    
    }
    
    // Inactivity timeout handler
    static void inactivity_timeout_handler(void * p_context)
    {
        UNUSED_PARAMETER(p_context);
        if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
        {
            // Disconnect from the peer.
            ret_code_t err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
            APP_ERROR_CHECK(err_code);
        }
    }
    
    
    /**@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);
    
        // Create timer
        err_code = app_timer_create(&m_inactivity_timer_id,
                                    APP_TIMER_MODE_SINGLE_SHOT,
                                    inactivity_timeout_handler);
        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);
    
        err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_UNKNOWN);
        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;
            // Notify the MCU that you will send data on UART
            nrf_gpio_pin_clear(UART_TX_NOTIFY);
            nrf_delay_ms(5);
            nrf_gpio_pin_set(UART_TX_NOTIFY);
            nrf_delay_ms(10);
    
            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);
            
            // Restart the inactivity timer
            err_code = app_timer_start(m_inactivity_timer_id, APP_TIMER_TICKS(13000), NULL);    // 13 sec timeout
            APP_ERROR_CHECK(err_code);
    
            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};
        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);
    
        // Initialize DFU buttonless.
        dfus_init.evt_handler = ble_dfu_evt_handler;
    
        err_code = ble_dfu_buttonless_init(&dfus_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:
                uart_init();
                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);
                // Start the inactivity timer
                err_code = app_timer_start(m_inactivity_timer_id, APP_TIMER_TICKS(13000), NULL);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_GAP_EVT_DISCONNECTED:
                // Stop the inactivity timer
                err_code = app_timer_stop(m_inactivity_timer_id);
                APP_ERROR_CHECK(err_code);
                // Wait for UART to finish
                while(app_uart_tx_done());
                app_uart_close();
                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:
                // Stop the inactivity timer
                err_code = app_timer_stop(m_inactivity_timer_id);
                APP_ERROR_CHECK(err_code);
                // 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:
                // Stop the inactivity timer
                err_code = app_timer_stop(m_inactivity_timer_id);
                APP_ERROR_CHECK(err_code);
                // 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;
        static uint8_t bytesToSend = 0;
    
        switch (p_event->evt_type)
        {
            case APP_UART_DATA_READY:
                UNUSED_VARIABLE(app_uart_get(&data_array[index]));
    
                if(index == 1)
                {
                    bytesToSend = (char)data_array[index];
                    bytesToSend+=2;
                    //printf("%c", bytesToSend);
                }
                index++;
    
                if ((index >= bytesToSend)&&(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)bytesToSend;
                        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);
                  
                    // Disconnect from phone
                    if(data_array[2] != 0x01)
                    {
                        // Stop the inactivity timer
                        ret_code_t err_code = app_timer_stop(m_inactivity_timer_id);
                        APP_ERROR_CHECK(err_code);
    
                        err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
                        APP_ERROR_CHECK(err_code);
                    }
    
                    index = 0;
                    bytesToSend = 0;
                }
    
            //**************    ORG      ********************************************
                //UNUSED_VARIABLE(app_uart_get(&data_array[index]));
                //index++;
    
                //if (((data_array[index - 2] == '\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);
                //    }
                    
                //    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,
            .baud_rate    = NRF_UART_BAUDRATE_115200
        };
    
        APP_UART_FIFO_INIT(&comm_params,
                           UART_RX_BUF_SIZE,
                           UART_TX_BUF_SIZE,
                           uart_event_handle,
                           APP_IRQ_PRIORITY_LOW,
                           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_GENERAL_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);
        //uint32_t err_code = bsp_init(BSP_INIT_LEDS, bsp_event_handler);
        //APP_ERROR_CHECK(err_code);
    
        //err_code = bsp_btn_ble_init(NULL, &startup_event);
        //APP_ERROR_CHECK(err_code);
    
        //*p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
    
        // Initialize output pin to notify the MCU
        nrf_gpio_cfg_output(UART_TX_NOTIFY);
        nrf_gpio_pin_set(UART_TX_NOTIFY);
        
        // Initialize pin to send MAC address
        nrf_gpio_cfg_input(WAKEUP_IN_PIN, NRF_GPIO_PIN_PULLUP);
    }
    
    
    /**@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 uint8_t *Convert_Hex_To_Ascii(uint8_t *hex_data, uint16_t data_len)
    {
        int i = 0;
        uint16_t j = 0;
        static uint8_t ascii_data[8];
        uint8_t pom_low, pom_high;
    
        for (i=0; i<data_len; i++)
        {
            pom_low = (hex_data[i] & 0x0F);
            pom_high = ((hex_data[i]>>4) & 0x0F);
    
            if((pom_low >= 0) && (pom_low <= 9))
            {
                pom_low += 0x30;
            }
            else
            {
                pom_low += 0x37;
            }
    
            if((pom_high >= 0) && (pom_high <= 9))
            {
                pom_high += 0x30;
            }
            else
            {
                pom_high += 0x37;
            }
    
            ascii_data[j++] = pom_high;
            ascii_data[j++] = pom_low;
        }
    
        return ascii_data; // return the address of the first element
    }
    
    static void make_dev_name(void)
    {
        ble_gap_addr_t device_address;
        uint8_t companyName[] = {"M"};
        uint8_t modelName[] = {"1"}
        uint8_t *macAddressName;
        uint8_t macTmp[12];
    
        sd_ble_gap_addr_get(&device_address);
        macAddressName = Convert_Hex_To_Ascii(&device_address.addr[0], 4);
        
        memcpy(&DEVICE_NAME[0], companyName, 1);
        memcpy(&DEVICE_NAME[1], modelName, 1);
        memcpy(&DEVICE_NAME[2], macAddressName, 12);
    
    }
    
    
    /**@brief Application main function.
     */
    int main(void)
    {
        bool erase_bonds;
        ret_code_t err_code;
        ble_gap_addr_t device_address;
        
        // Comment this for new modules
        sd_power_dcdc_mode_set(1);
    
        // Initialize.
        uart_init();
        log_init();
    
        // Initialize the async SVCI interface to bootloader before any interrupts are enabled.
        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();
    
        make_dev_name();
    
        gap_params_init();
        gatt_init();
        services_init();
        advertising_init();
        conn_params_init();
    
        //if(nrf_gpio_pin_read(WAKEUP_IN_PIN))
        //{
        //    while(1);   // wait here 
        //}
    
        sd_ble_gap_addr_get(&device_address);
        nrf_delay_ms(5);
        while(!nrf_gpio_pin_read(WAKEUP_IN_PIN))
        {
            //nrf_gpio_pin_clear(UART_TX_NOTIFY);
            //nrf_delay_ms(250);
            //nrf_gpio_pin_set(UART_TX_NOTIFY);
            for(int i=0; i<6; i++)
            {
                do
                {
                    err_code = app_uart_put(device_address.addr[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);
                
            }
            //nrf_delay_ms(500);
            nrf_delay_ms(50);
        }
    
        // Start execution.
        //printf("\r\nApplication started.\r\n");
        NRF_LOG_INFO("Debug logging for UART over RTT started.");
        while(app_uart_tx_done());
        app_uart_close();
        advertising_start();
    
        wdt_init();
    
        // Enter main loop.
        for (;;)
        {
            // Feed the watchdog
            feed_dog();
            // Power management 
            idle_state_handle();
    
        }
    }
    
    /**
     * @}
     */

Reply
  • Device name is referenced as uint8_t array

    /** @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 "main.h"
    #include "nordic_common.h"
    #include "nrf.h"
    #include "ble_hci.h"
    #include "ble_advdata.h"
    #include "ble_advertising.h"
    #include "ble_conn_params.h"
    #include "nrf_sdh.h"
    #include "nrf_sdh_soc.h"
    #include "nrf_sdh_ble.h"
    #include "nrf_ble_gatt.h"
    #include "nrf_ble_qwr.h"
    #include "app_timer.h"
    #include "ble_nus.h"
    #include "app_uart.h"
    #include "app_util_platform.h"
    #include "bsp_btn_ble.h"
    #include "nrf_pwr_mgmt.h"
    
    #if defined (UART_PRESENT)
    #include "nrf_uart.h"
    #endif
    #if defined (UARTE_PRESENT)
    #include "nrf_uarte.h"
    #endif
    
    #include "nrf_log.h"
    #include "nrf_log_ctrl.h"
    #include "nrf_log_default_backends.h"
    #include "nrf_gpio.h"
    #include "nrf_delay.h"  
    #include "nrf_drv_wdt.h"
    #include "nrf_drv_clock.h"
    
    // BEGIN Block Added for DFU
    #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"
    // END Block Added for DFU
    
    
    #define WAKEUP_IN_PIN   NRF_GPIO_PIN_MAP(0,4)               // Check this pin if need to send MAC
    static void uart_init(void);
    
    
    #define APP_BLE_CONN_CFG_TAG            1                                           /**< A tag identifying the SoftDevice BLE configuration. */
    
    uint8_t DEVICE_NAME[29];
    //#define DEVICE_NAME                     "M1"                                   /**< 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                MSEC_TO_UNITS(500, UNIT_0_625_MS)            /**< 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(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. */
    APP_TIMER_DEF(m_inactivity_timer_id);                                               // Define the timer 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}
    };
    
    //*************** DFU START     *********************************************
    
    
    /**@brief Handler for shutdown preparation.
     *
     * @details During shutdown procedures, this function will be called at a 1 second interval
     *          untill the function returns true. When the function returns true, it means that the
     *          app is ready to reset to DFU mode.
     *
     * @param[in]   event   Power manager event.
     *
     * @retval  True if shutdown is allowed by this power manager handler, otherwise false.
     */
    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.");
                // YOUR_JOB: Get ready to reset into DFU mode
                //
                // If you aren't finished with any ongoing tasks, return "false" to
                // signal to the system that reset is impossible at this stage.
                //
                // Here is an example using a variable to delay resetting the device.
                //
                // if (!m_ready_for_reset)
                // {
                //      return false;
                // }
                // else
                //{
                //
                //    // Device ready to enter
                //    uint32_t err_code;
                //    err_code = sd_softdevice_disable();
                //    APP_ERROR_CHECK(err_code);
                //    err_code = app_timer_stop_all();
                //    APP_ERROR_CHECK(err_code);
                //}
                break;
    
            default:
                // YOUR_JOB: 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.");
        return true;
    }
    
    //lint -esym(528, m_app_shutdown_handler)
    /**@brief Register application shutdown handler with priority 0.
     */
    NRF_PWR_MGMT_HANDLER_REGISTER(app_shutdown_handler, 0);
    
    
    static void buttonless_dfu_sdh_state_observer(nrf_sdh_state_evt_t state, void * p_context)
    {
        if (state == NRF_SDH_EVT_STATE_DISABLED)
        {
            // Softdevice was disabled before going into reset. Inform bootloader to skip CRC on next boot.
            nrf_power_gpregret2_set(BOOTLOADER_DFU_SKIP_CRC);
    
            //Go to system off.
            nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_SYSOFF);
        }
    }
    
    /* nrf_sdh state observer. */
    NRF_SDH_STATE_OBSERVER(m_buttonless_dfu_state_obs, 0) =
    {
        .handler = buttonless_dfu_sdh_state_observer,
    };
    
    
    static void advertising_config_get(ble_adv_modes_config_t * p_config)
    {
        memset(p_config, 0, sizeof(ble_adv_modes_config_t));
    
        p_config->ble_adv_fast_enabled  = true;
        p_config->ble_adv_fast_interval = APP_ADV_INTERVAL;
        p_config->ble_adv_fast_timeout  = APP_ADV_DURATION;
    }
    
    static void disconnect(uint16_t conn_handle, void * p_context)
    {
        UNUSED_PARAMETER(p_context);
    
        ret_code_t err_code = sd_ble_gap_disconnect(conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
        if (err_code != NRF_SUCCESS)
        {
            NRF_LOG_WARNING("Failed to disconnect connection. Connection handle: %d Error: %d", conn_handle, err_code);
        }
        else
        {
            NRF_LOG_DEBUG("Disconnected connection handle %d", conn_handle);
        }
    }
    
    // YOUR_JOB: Update this code if you want to do anything given a DFU event (optional).
    /**@brief Function for handling dfu events from the Buttonless Secure DFU service
     *
     * @param[in]   event   Event from the Buttonless Secure DFU service.
     */
    static void ble_dfu_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.");
    
                // Prevent device from advertising on disconnect.
                ble_adv_modes_config_t config;
                advertising_config_get(&config);
                config.ble_adv_on_disconnect_disabled = true;
                ble_advertising_modes_config_set(&m_advertising, &config);
    
                // Disconnect all other bonded devices that currently are connected.
                // This is required to receive a service changed indication
                // on bootup after a successful (or aborted) Device Firmware Update.
                uint32_t conn_count = ble_conn_state_for_each_connected(disconnect, NULL);
                NRF_LOG_INFO("Disconnected %d links.", conn_count);
                break;
            }
    
            case BLE_DFU_EVT_BOOTLOADER_ENTER:
                // YOUR_JOB: Write app-specific unwritten data to FLASH, control finalization of this
                //           by delaying reset by reporting false in app_shutdown_handler
                NRF_LOG_INFO("Device will enter bootloader mode.");
                break;
    
            case BLE_DFU_EVT_BOOTLOADER_ENTER_FAILED:
                NRF_LOG_ERROR("Request to enter bootloader mode failed asynchroneously.");
                // YOUR_JOB: Take corrective measures to resolve the issue
                //           like calling APP_ERROR_CHECK to reset the device.
                break;
    
            case BLE_DFU_EVT_RESPONSE_SEND_ERROR:
                NRF_LOG_ERROR("Request to send a response to client failed.");
                // YOUR_JOB: Take corrective measures to resolve the issue
                //           like calling APP_ERROR_CHECK to reset the device.
                APP_ERROR_CHECK(false);
                break;
    
            default:
                NRF_LOG_ERROR("Unknown event from ble_dfu_buttonless.");
                break;
        }
    }
    
    //*************** DFU END       **********************************************
    
    // Watch Dog enable
    nrfx_wdt_channel_id m_channel_id;
    
    void wdt_event_handler(void)
    {
        NRF_LOG_INFO("%s", __func__);
        while (NRF_LOG_PROCESS());
        NRF_LOG_FINAL_FLUSH();
    }
    
    void feed_dog(void)
    {
         nrf_drv_wdt_channel_feed(m_channel_id);
    }
    
    void wdt_init(void)
    {
        //2 sec timeout
        uint32_t err_code = NRF_SUCCESS;
        nrfx_wdt_config_t wdt_config = NRFX_WDT_DEAFULT_CONFIG;
    
        err_code = nrfx_wdt_init(&wdt_config, wdt_event_handler);
        APP_ERROR_CHECK(err_code);
    
        err_code = nrfx_wdt_channel_alloc(&m_channel_id);
        APP_ERROR_CHECK(err_code);
    
        nrfx_wdt_enable();
    
    }
    
    // Inactivity timeout handler
    static void inactivity_timeout_handler(void * p_context)
    {
        UNUSED_PARAMETER(p_context);
        if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
        {
            // Disconnect from the peer.
            ret_code_t err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
            APP_ERROR_CHECK(err_code);
        }
    }
    
    
    /**@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);
    
        // Create timer
        err_code = app_timer_create(&m_inactivity_timer_id,
                                    APP_TIMER_MODE_SINGLE_SHOT,
                                    inactivity_timeout_handler);
        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);
    
        err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_UNKNOWN);
        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;
            // Notify the MCU that you will send data on UART
            nrf_gpio_pin_clear(UART_TX_NOTIFY);
            nrf_delay_ms(5);
            nrf_gpio_pin_set(UART_TX_NOTIFY);
            nrf_delay_ms(10);
    
            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);
            
            // Restart the inactivity timer
            err_code = app_timer_start(m_inactivity_timer_id, APP_TIMER_TICKS(13000), NULL);    // 13 sec timeout
            APP_ERROR_CHECK(err_code);
    
            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};
        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);
    
        // Initialize DFU buttonless.
        dfus_init.evt_handler = ble_dfu_evt_handler;
    
        err_code = ble_dfu_buttonless_init(&dfus_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:
                uart_init();
                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);
                // Start the inactivity timer
                err_code = app_timer_start(m_inactivity_timer_id, APP_TIMER_TICKS(13000), NULL);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_GAP_EVT_DISCONNECTED:
                // Stop the inactivity timer
                err_code = app_timer_stop(m_inactivity_timer_id);
                APP_ERROR_CHECK(err_code);
                // Wait for UART to finish
                while(app_uart_tx_done());
                app_uart_close();
                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:
                // Stop the inactivity timer
                err_code = app_timer_stop(m_inactivity_timer_id);
                APP_ERROR_CHECK(err_code);
                // 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:
                // Stop the inactivity timer
                err_code = app_timer_stop(m_inactivity_timer_id);
                APP_ERROR_CHECK(err_code);
                // 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;
        static uint8_t bytesToSend = 0;
    
        switch (p_event->evt_type)
        {
            case APP_UART_DATA_READY:
                UNUSED_VARIABLE(app_uart_get(&data_array[index]));
    
                if(index == 1)
                {
                    bytesToSend = (char)data_array[index];
                    bytesToSend+=2;
                    //printf("%c", bytesToSend);
                }
                index++;
    
                if ((index >= bytesToSend)&&(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)bytesToSend;
                        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);
                  
                    // Disconnect from phone
                    if(data_array[2] != 0x01)
                    {
                        // Stop the inactivity timer
                        ret_code_t err_code = app_timer_stop(m_inactivity_timer_id);
                        APP_ERROR_CHECK(err_code);
    
                        err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
                        APP_ERROR_CHECK(err_code);
                    }
    
                    index = 0;
                    bytesToSend = 0;
                }
    
            //**************    ORG      ********************************************
                //UNUSED_VARIABLE(app_uart_get(&data_array[index]));
                //index++;
    
                //if (((data_array[index - 2] == '\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);
                //    }
                    
                //    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,
            .baud_rate    = NRF_UART_BAUDRATE_115200
        };
    
        APP_UART_FIFO_INIT(&comm_params,
                           UART_RX_BUF_SIZE,
                           UART_TX_BUF_SIZE,
                           uart_event_handle,
                           APP_IRQ_PRIORITY_LOW,
                           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_GENERAL_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);
        //uint32_t err_code = bsp_init(BSP_INIT_LEDS, bsp_event_handler);
        //APP_ERROR_CHECK(err_code);
    
        //err_code = bsp_btn_ble_init(NULL, &startup_event);
        //APP_ERROR_CHECK(err_code);
    
        //*p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
    
        // Initialize output pin to notify the MCU
        nrf_gpio_cfg_output(UART_TX_NOTIFY);
        nrf_gpio_pin_set(UART_TX_NOTIFY);
        
        // Initialize pin to send MAC address
        nrf_gpio_cfg_input(WAKEUP_IN_PIN, NRF_GPIO_PIN_PULLUP);
    }
    
    
    /**@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 uint8_t *Convert_Hex_To_Ascii(uint8_t *hex_data, uint16_t data_len)
    {
        int i = 0;
        uint16_t j = 0;
        static uint8_t ascii_data[8];
        uint8_t pom_low, pom_high;
    
        for (i=0; i<data_len; i++)
        {
            pom_low = (hex_data[i] & 0x0F);
            pom_high = ((hex_data[i]>>4) & 0x0F);
    
            if((pom_low >= 0) && (pom_low <= 9))
            {
                pom_low += 0x30;
            }
            else
            {
                pom_low += 0x37;
            }
    
            if((pom_high >= 0) && (pom_high <= 9))
            {
                pom_high += 0x30;
            }
            else
            {
                pom_high += 0x37;
            }
    
            ascii_data[j++] = pom_high;
            ascii_data[j++] = pom_low;
        }
    
        return ascii_data; // return the address of the first element
    }
    
    static void make_dev_name(void)
    {
        ble_gap_addr_t device_address;
        uint8_t companyName[] = {"M"};
        uint8_t modelName[] = {"1"}
        uint8_t *macAddressName;
        uint8_t macTmp[12];
    
        sd_ble_gap_addr_get(&device_address);
        macAddressName = Convert_Hex_To_Ascii(&device_address.addr[0], 4);
        
        memcpy(&DEVICE_NAME[0], companyName, 1);
        memcpy(&DEVICE_NAME[1], modelName, 1);
        memcpy(&DEVICE_NAME[2], macAddressName, 12);
    
    }
    
    
    /**@brief Application main function.
     */
    int main(void)
    {
        bool erase_bonds;
        ret_code_t err_code;
        ble_gap_addr_t device_address;
        
        // Comment this for new modules
        sd_power_dcdc_mode_set(1);
    
        // Initialize.
        uart_init();
        log_init();
    
        // Initialize the async SVCI interface to bootloader before any interrupts are enabled.
        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();
    
        make_dev_name();
    
        gap_params_init();
        gatt_init();
        services_init();
        advertising_init();
        conn_params_init();
    
        //if(nrf_gpio_pin_read(WAKEUP_IN_PIN))
        //{
        //    while(1);   // wait here 
        //}
    
        sd_ble_gap_addr_get(&device_address);
        nrf_delay_ms(5);
        while(!nrf_gpio_pin_read(WAKEUP_IN_PIN))
        {
            //nrf_gpio_pin_clear(UART_TX_NOTIFY);
            //nrf_delay_ms(250);
            //nrf_gpio_pin_set(UART_TX_NOTIFY);
            for(int i=0; i<6; i++)
            {
                do
                {
                    err_code = app_uart_put(device_address.addr[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);
                
            }
            //nrf_delay_ms(500);
            nrf_delay_ms(50);
        }
    
        // Start execution.
        //printf("\r\nApplication started.\r\n");
        NRF_LOG_INFO("Debug logging for UART over RTT started.");
        while(app_uart_tx_done());
        app_uart_close();
        advertising_start();
    
        wdt_init();
    
        // Enter main loop.
        for (;;)
        {
            // Feed the watchdog
            feed_dog();
            // Power management 
            idle_state_handle();
    
        }
    }
    
    /**
     * @}
     */

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