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Why uuid and major/minor are displayed differently?

Michal

Hello. 

I wrote a simple beacon application which advertises with uuid, major, minor and name. Now what I saw in sample beacon I found somewhere is that nrf connect properly parses uuid , major , minor:

And when nrf connect parses my adv packet it looks like this:

My understanding is that ibeacon is adding more information about what it advertises and beacuse of that information nrf connect can parse it correctly. Is that right?

Seems ok but.. I have build my example upon beacon example from SDK. So I added minor, major, uuid throghj manu specific data. I modified example to include name in adv data. But problem was that I was running out of adv space and even needed to remove flags and make a hack in ble_advdata.c because ble_advdata_set function started to return error cause by to long data. I inculde my main.c , please let me know what am I doing wrong.

Regards,

Michal

  • 0

    I am not sure how include .c file here it is  : 

    Fullscreen 87827.main.c Download 
    /* Copyright (c) 2014 Nordic Semiconductor. All Rights Reserved.
 *
 * The information contained herein is property of Nordic Semiconductor ASA.
 * Terms and conditions of usage are described in detail in NORDIC
 * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
 *
 * Licensees are granted free, non-transferable use of the information. NO
 * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
 * the file.
 *
 */

#include <stdbool.h>
#include <stdint.h>
#include "ble_advdata.h"
#include "nordic_common.h"
#include "softdevice_handler.h"
#include "bsp.h"
#include "app_timer.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_drv_gpiote.h"
#include "nrf_delay.h"
#include "nrf51.h"

#define BAT_MEAURE_PERIOD_HOURS         10
#define ADV_PERIOD_MS                   5000                              // advertising period
#define WAKE_GPIO                       17                                // wake up gpio
#define ADV_INTERVAL_MS                 1000                              // advertising interval
#define TX_POWER_LEVEL                  (-4)                                // tx power level
#define DEVICE_NAME                     "XYZ"                               // device name
#define APP_MAJOR_VALUE                 0x01, 0x02                        /**< Major value used to identify Beacons. */
#define APP_MINOR_VALUE                 0x03, 0x04                        /**< Minor value used to identify Beacons. */
#define VBAT_MAX_IN_MV                  3000

#define CENTRAL_LINK_COUNT              0                                 /**< Number of central links used by the application. When changing this number remember to adjust the RAM settings*/
#define PERIPHERAL_LINK_COUNT           0                                 /**< Number of peripheral links used by the application. When changing this number remember to adjust the RAM settings*/

#define IS_SRVC_CHANGED_CHARACT_PRESENT 0                                 /**< Include or not the service_changed characteristic. if not enabled, the server's database cannot be changed for the lifetime of the device*/

#define APP_CFG_NON_CONN_ADV_TIMEOUT    0                                 /**< Time for which the device must be advertising in non-connectable mode (in seconds). 0 disables timeout. */
#define NON_CONNECTABLE_ADV_INTERVAL    MSEC_TO_UNITS(ADV_INTERVAL_MS, UNIT_0_625_MS) 
                                                                          /**< The advertising interval for non-connectable advertisement (100 ms). This value can vary between 100ms to 10.24s). */

#define APP_BEACON_INFO_LENGTH          0x17                              /**< Total length of information advertised by the Beacon. */
#define APP_ADV_DATA_LENGTH             0x16                              /**< Length of manufacturer specific data in the advertisement. */
#define APP_DEVICE_TYPE                 0x02                              /**< 0x02 refers to Beacon. */
#define APP_MEASURED_RSSI               0xC3                              /**< The Beacon's measured RSSI at 1 meter distance in dBm. */
#define APP_COMPANY_IDENTIFIER          0x0059                            /**< Company identifier for Nordic Semiconductor ASA. as per www.bluetooth.org. */

#define APP_BEACON_UUID                 0x01, 0x12, 0x23, 0x34, \
                                        0x45, 0x56, 0x67, 0x78, \
                                        0x89, 0x9a, 0xab, 0xbc, \
                                        0xcd, 0xde, 0xef, 0xf0            /**< Proprietary UUID for Beacon. */

#define DEAD_BEEF                       0xDEADBEEF                        /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */

#define APP_TIMER_PRESCALER             15                                /**< Value of the RTC1 PRESCALER register. */
#define APP_TIMER_OP_QUEUE_SIZE         4                                 /**< Size of timer operation queues. */

#define USE_UICR_FOR_MAJ_MIN_VALUES

// #if defined(USE_UICR_FOR_MAJ_MIN_VALUES)
#define MAJ_VAL_OFFSET_IN_BEACON_INFO   0x01                                /**< Position of the MSB of the Major Value in m_beacon_info array. */
#define UICR_ADDRESS                    0x10001080                        /**< Address of the UICR register used by this example. The major and minor versions to be encoded into the advertising data will be picked up from this location. */
// #endif

#define DEBUG_TOGGLE(pin)               //nrf_gpio_pin_toggle(pin)

APP_TIMER_DEF(sleep_timer);
APP_TIMER_DEF(bas_timer);

static bool module_advertising = false;
static ble_gap_adv_params_t m_adv_params;                                 /**< Parameters to be passed to the stack when starting advertising. */
static uint8_t m_beacon_info[APP_ADV_DATA_LENGTH] =                    /**< Information advertised by the Beacon. */
{
    APP_ADV_DATA_LENGTH, // Manufacturer specific information. Specifies the length of the
                         // manufacturer specific data in this implementation.
    APP_MAJOR_VALUE,     // Major arbitrary value that can be used to distinguish between Beacons.
    APP_MINOR_VALUE,     // Minor arbitrary value that can be used to distinguish between Beacons.
    APP_BEACON_UUID
};

/**@brief Callback function for asserts in the SoftDevice.
 *
 * @details This function will be called in case of an assert in the SoftDevice.
 *
 * @warning This handler is an example only and does not fit a final product. You need to analyze
 *          how your product is supposed to react in case of Assert.
 * @warning On assert from the SoftDevice, the system can only recover on reset.
 *
 * @param[in]   line_num   Line number of the failing ASSERT call.
 * @param[in]   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 Advertising functionality.
 *
 * @details Encodes the required advertising data and passes it to the stack.
 *          Also builds a structure to be passed to the stack when starting advertising.
 */
static void advertising_init(int8_t * p_tx_power_level, uint8_t * p_battery_level)
{
    uint32_t      err_code;
    ble_advdata_t advdata;
    uint8_t       flags = BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED;

    ble_advdata_manuf_data_t manuf_specific_data;

    manuf_specific_data.company_identifier = APP_COMPANY_IDENTIFIER;

    uint8_t index = MAJ_VAL_OFFSET_IN_BEACON_INFO;
#if defined(USE_UICR_FOR_MAJ_MIN_VALUES)
    // If USE_UICR_FOR_MAJ_MIN_VALUES is defined, the major and minor values will be read from the
    // UICR instead of using the default values. The major and minor values obtained from the UICR
    // are encoded into advertising data in big endian order (MSB First).
    // To set the UICR used by this example to a desired value, write to the address 0x10001080
    // using the nrfjprog tool. The command to be used is as follows.
    // nrfjprog --snr <Segger-chip-Serial-Number> --memwr 0x10001080 --val <your major/minor value>
    // For example, for a major value and minor value of 0xabcd and 0x0102 respectively, the
    // the following command should be used.
    // nrfjprog --snr <Segger-chip-Serial-Number> --memwr 0x10001080 --val 0xabcd0102
    uint16_t major_value = ((*(uint32_t *)UICR_ADDRESS) & 0xFFFF0000) >> 16;
    uint16_t minor_value = ((*(uint32_t *)UICR_ADDRESS) & 0x0000FFFF);


    m_beacon_info[index++] = MSB_16(major_value);
    m_beacon_info[index++] = LSB_16(major_value);

    m_beacon_info[index++] = MSB_16(minor_value);
    m_beacon_info[index++] = LSB_16(minor_value);
#endif
    if (p_battery_level != NULL)
    {
      m_beacon_info[APP_ADV_DATA_LENGTH -1] = *p_battery_level;
    }
    manuf_specific_data.data.p_data = (uint8_t *) m_beacon_info;
    manuf_specific_data.data.size   = APP_ADV_DATA_LENGTH;

    // Build and set advertising data.
    memset(&advdata, 0, sizeof(advdata));

    advdata.name_type             = BLE_ADVDATA_FULL_NAME;
    // advdata.flags                 = flags;
    if (p_tx_power_level != NULL)
    {
        advdata.p_tx_power_level = p_tx_power_level;
    }
    advdata.p_manuf_specific_data = &manuf_specific_data;
    err_code = ble_advdata_set(&advdata, NULL);
    APP_ERROR_CHECK(err_code);

    // Initialize advertising parameters (used when starting advertising).
    memset(&m_adv_params, 0, sizeof(m_adv_params));

    m_adv_params.type        = BLE_GAP_ADV_TYPE_ADV_NONCONN_IND;
    m_adv_params.p_peer_addr = NULL;                             // Undirected advertisement.
    m_adv_params.fp          = BLE_GAP_ADV_FP_ANY;
    m_adv_params.interval    = NON_CONNECTABLE_ADV_INTERVAL;
    m_adv_params.timeout     = APP_CFG_NON_CONN_ADV_TIMEOUT;
}


/**@brief Function for starting advertising.
 */
static void advertising_start(void)
{
    uint32_t err_code;

    err_code = sd_ble_gap_adv_start(&m_adv_params);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing the BLE stack.
 *
 * @details Initializes the SoftDevice and the BLE event interrupt.
 */
static void ble_stack_init(void)
{
    uint32_t err_code;

    nrf_clock_lf_cfg_t clock_lf_cfg = NRF_CLOCK_LFCLKSRC;

    // Initialize the SoftDevice handler module.
    SOFTDEVICE_HANDLER_INIT(&clock_lf_cfg, NULL);

    ble_enable_params_t ble_enable_params;
    err_code = softdevice_enable_get_default_config(CENTRAL_LINK_COUNT,
                                                    PERIPHERAL_LINK_COUNT,
                                                    &ble_enable_params);
    APP_ERROR_CHECK(err_code);

    //Check the ram settings against the used number of links
    CHECK_RAM_START_ADDR(CENTRAL_LINK_COUNT,PERIPHERAL_LINK_COUNT);

    // Enable BLE stack.
    err_code = softdevice_enable(&ble_enable_params);
    APP_ERROR_CHECK(err_code);
}

static void device_name_init(void)
{
    uint32_t                err_code;
    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);
}

/**@brief Function for doing power management.
 */
static void power_manage(void)
{
    uint32_t err_code = sd_app_evt_wait();
    APP_ERROR_CHECK(err_code);
}

void advertise(uint8_t * battery_level)
{
  if (module_advertising == false)
  {
    module_advertising = true;
    app_timer_start(sleep_timer, APP_TIMER_TICKS(ADV_PERIOD_MS, APP_TIMER_PRESCALER), NULL);
    advertising_init(NULL, battery_level);
    advertising_start();
  }
}

uint8_t battery_level_get(void)
{
  uint8_t result = 0xFF;
  // Configure ADC
#ifdef DEBUG_TOGGLE
  NRF_ADC->CONFIG     = (ADC_CONFIG_RES_8bit                        << ADC_CONFIG_RES_Pos)     |
                        (ADC_CONFIG_INPSEL_SupplyOneThirdPrescaling << ADC_CONFIG_INPSEL_Pos)  |
                        (ADC_CONFIG_REFSEL_VBG                      << ADC_CONFIG_REFSEL_Pos)  |
                        (ADC_CONFIG_PSEL_Disabled                   << ADC_CONFIG_PSEL_Pos)    |
                        (ADC_CONFIG_EXTREFSEL_None                  << ADC_CONFIG_EXTREFSEL_Pos);
#else
  NRF_ADC->CONFIG     = (ADC_CONFIG_RES_8bit                        << ADC_CONFIG_RES_Pos)     |
                        (ADC_CONFIG_INPSEL_SupplyOneThirdPrescaling << ADC_CONFIG_INPSEL_Pos)  |
                        (ADC_CONFIG_REFSEL_VBG                      << ADC_CONFIG_REFSEL_Pos)  |
                        (ADC_CONFIG_PSEL_AnalogInput2               << ADC_CONFIG_PSEL_Pos)    |
                        (ADC_CONFIG_EXTREFSEL_None                  << ADC_CONFIG_EXTREFSEL_Pos);
#endif


  NRF_ADC->EVENTS_END = 0;
  NRF_ADC->ENABLE     = ADC_ENABLE_ENABLE_Enabled;

  NRF_ADC->EVENTS_END  = 0;    // Stop any running conversions.
  NRF_ADC->TASKS_START = 1;

  while (!NRF_ADC->EVENTS_END)
  {
  }

  uint16_t vbg_in_mv = 1200;
  uint8_t adc_max = 255;
  uint16_t vbat_current_in_mv = (NRF_ADC->RESULT * 3 * vbg_in_mv) / adc_max;

#ifndef DEBUG_TOGGLE
  vbat_current_in_mv *= 4; //because of voltage divider
#endif

  NRF_ADC->EVENTS_END     = 0;
  NRF_ADC->TASKS_STOP     = 1;

  NRF_ADC->ENABLE     = ADC_ENABLE_ENABLE_Disabled;


// 00 - battery level is above 2.8 
// 01 - battery is between 2,7 and 2.8
// 10  - battery is between 2,6 and 2.7
// 11 - battery level is below 2.6

  if (vbat_current_in_mv > 2800)
  {
    result = 0;
  }
  else if (vbat_current_in_mv > 2700)
  {
    result = 1;
  }
  else if (vbat_current_in_mv > 2600)
  {
    result = 2;
  }
  else
  {
    result = 3;
  }

  return result;
}

void sleep_timer_handler(void * p_context)
{
  DEBUG_TOGGLE(23);
  module_advertising = false;
  uint32_t err_code = sd_ble_gap_adv_stop();
  APP_ERROR_CHECK(err_code);
  __DSB();
  __NOP();
}

void bas_timer_handler(void * p_context)
{
  uint8_t lvl = battery_level_get();
  advertise(&lvl);
}


void init_timer(void)
{
    APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, false);
    uint32_t err_code = app_timer_create(&sleep_timer,
                                        APP_TIMER_MODE_SINGLE_SHOT,
                                        sleep_timer_handler);
    err_code = app_timer_create(&bas_timer,
                                APP_TIMER_MODE_REPEATED,
                                bas_timer_handler);
    APP_ERROR_CHECK(err_code);
}

void in_pin_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
{
  DEBUG_TOGGLE(22);
  // uint8_t lvl = battery_level_get();
  advertise(NULL);
}

static void gpio_init(void)
{
    ret_code_t err_code;

    err_code = nrf_drv_gpiote_init();
    APP_ERROR_CHECK(err_code);

    nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_HITOLO(false);
    in_config.pull = NRF_GPIO_PIN_PULLUP;

    err_code = nrf_drv_gpiote_in_init(WAKE_GPIO, &in_config, in_pin_handler);
    APP_ERROR_CHECK(err_code);

    nrf_drv_gpiote_in_event_enable(WAKE_GPIO, true);
}

/**
 * @brief Function for application main entry.
 */
int main(void)
{
    static int8_t tx_power_level = TX_POWER_LEVEL;

    // nrf_gpio_cfg_output(21);
    // nrf_gpio_cfg_output(22);
    // nrf_gpio_cfg_output(23);

    init_timer();    
    app_timer_start(bas_timer, APP_TIMER_TICKS((BAT_MEAURE_PERIOD_HOURS * 60 * 60 * 1000), APP_TIMER_PRESCALER), NULL);
    gpio_init();
    // Enter main loop.
    ble_stack_init();
    sd_ble_gap_tx_power_set(tx_power_level);
    device_name_init();

    for (;; )
    {
      __WFE();
      DEBUG_TOGGLE(21);
    }
}


/**
 * @}
 */

  • +1

    So I just noted that I can change how the data is displayed:

    Tapping blue description enables user to choose "beacon data" and that is what I was looking for. It still requires a specific format and order of data fields but that is understandable. Is there somekind of tutorial for nrf connect ? 

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