RE: How do I show the status of an LED with a ble advertising packet using nRF52840-dk?

Aaron_BC — Tue, 07 Sep 2021 14:02:38 GMT
I ended up getting this program to work. For some reason the ble_advertising_advdata_update() function was not working on sdk 15.3, but it was successful once I switched over to sdk 17.
RE: How do I show the status of an LED with a ble advertising packet using nRF52840-dk?

Jared — Mon, 06 Sep 2021 06:40:02 GMT
Does the program enter the app timer handler? Could you verify it by setting a breakpoint in the handler and see if the program enters it on a timeout.
RE: How do I show the status of an LED with a ble advertising packet using nRF52840-dk?

Aaron_BC — Fri, 03 Sep 2021 19:44:15 GMT
I am just advertising. I am using the manuf specific data field to display the led status but I cannot get it to update dynamically. I am trying to use ble_advertising_advdata_update() but its not working.
#include <stdbool.h>
#include <stdint.h>
#include <string.h>

#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"

#include "app_timer.h"

#include "bsp_btn_ble.h"

#include "nrf_pwr_mgmt.h"

#include "nrf_sdh.h"
#include "nrf_sdh_ble.h"
#include "nrf_sdh_soc.h"

#include "nrf_ble_qwr.h"

#include "nrf_ble_gatt.h"

#include "ble_advdata.h"
#include "ble_advertising.h"

#include "ble_conn_params.h"

#include "boards.h"

#include "nrf_drv_saadc.h"
#include "nrf_drv_gpiote.h"

#define ADC_INTERVAL           APP_TIMER_TICKS(2000)
#define SECOND_STATUS_INTERVAL APP_TIMER_TICKS(5000)

APP_TIMER_DEF(m_app_timer_id);
APP_TIMER_DEF(m_app_timer_id1);

#define APP_BLE_CONN_CFG_TAG   1 
#define APP_BLE_OBSERVER_PRIO  3  


#define DEVICE_NAME            "Aaron's nRF BT"

#define MIN_CONN_INTERVAL      MSEC_TO_UNITS(100, UNIT_1_25_MS)
#define MAX_CONN_INTERVAL      MSEC_TO_UNITS(200, UNIT_1_25_MS)
#define SLAVE_LATENCY          0
#define CONN_SUP_TIMEOUT       MSEC_TO_UNITS(2000, UNIT_10_MS);

#define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000)
#define NEXT_CONN_PARAMS_UPDATE_DELAY  APP_TIMER_TICKS(30000)
#define MAX_CONN_PARAMS_UPDATE_COUNT   3


#define APP_ADV_INTERVAL       300
#define APP_ADV_DURATION       0


#define BUTTON 12

#define SAMPLE_BUFFER_LEN 1

enum state {none, first, second, third} status;

static nrf_saadc_value_t m_buffer_pool[2][SAMPLE_BUFFER_LEN];

NRF_BLE_QWR_DEF(m_qwr);
NRF_BLE_GATT_DEF(m_gatt);
BLE_ADVERTISING_DEF(m_advertising);

static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID;

uint32_t count;

float volts;


//added to attempt dynamic data packets
//define a timer handle for dynamic data
APP_TIMER_DEF(m_adv_data_update_timer);

//define a data update interval
#define ADV_DATA_UPDATE_INTERVAL        APP_TIMER_TICKS(5000)

#define MANUF_PAYLOAD_1 0x31 //led on
#define MANUF_PAYLOAD_2 0x32 //led off

#define PAYLOAD_SIZE                    1
#define TOP_INDEX                       1

#define APP_COMPANY_IDENTIFIER          0x0059                                  /**< Company identifier for Nordic Semiconductor ASA. as per www.bluetooth.org. */
  
static ble_advdata_t                    new_advdata;


static uint8_t manufacturing_data_payload_list[] = 
{
    MANUF_PAYLOAD_1,
    MANUF_PAYLOAD_2
};

//timer handler for ADC sample
static void app_timer_handler(void * p_context){

   nrfx_saadc_sample();

}

//timer handler for second status blinky
static void app_timer_handler1(void * p_context){

   if(status == 2){
    
   bsp_board_led_invert(2);

   }

}


/*****************************************************************************************************
*analog to digital event handler
*****************************************************************************************************/
void saadc_callback_handler(nrf_drv_saadc_evt_t const * p_event){

  float val;

  if(p_event->type == NRFX_SAADC_EVT_DONE){
  
    ret_code_t err_code;

    err_code = nrfx_saadc_buffer_convert(p_event->data.done.p_buffer, SAMPLE_BUFFER_LEN);
    APP_ERROR_CHECK(err_code);

    int i = 0;

      val = p_event->data.done.p_buffer[i] * 3.6 / 4096;
      volts = val;

      if(val < 1){
      
        NRF_LOG_INFO("The LED is ON with an ADC value of: ")
      }
      else{
      
        NRF_LOG_INFO("The LED is OFF with an ADC value of: ");
      }

      NRF_LOG_INFO("sample read: %d", p_event->data.done.p_buffer[i]);

      NRF_LOG_INFO("Voltage read: " NRF_LOG_FLOAT_MARKER "\r\n", NRF_LOG_FLOAT(val));

  }

}


/********************************************************************************************************
*initialize the analog to digital converter
********************************************************************************************************/
void saadc_init(void){

  ret_code_t err_code;

  nrf_saadc_channel_config_t channel_config = NRFX_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_AIN7);

  err_code = nrf_drv_saadc_init(NULL, saadc_callback_handler);
  APP_ERROR_CHECK(err_code);

  err_code = nrfx_saadc_channel_init(0,&channel_config);
  APP_ERROR_CHECK(err_code);

  err_code = nrfx_saadc_buffer_convert(m_buffer_pool[0], SAMPLE_BUFFER_LEN);
  APP_ERROR_CHECK(err_code);

  err_code = nrfx_saadc_buffer_convert(m_buffer_pool[1], SAMPLE_BUFFER_LEN);
  APP_ERROR_CHECK(err_code);
}


/********************************************************************************
*event handler for button press to update status
********************************************************************************/
void input_pin_handle(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action){

  if(status < 3){

    status++;

  }

  else{status = first;}

}


/************************************************************
*create an interrupt when the button is pressed
*************************************************************/
void gpio_init(){

  ret_code_t err_code; //hold error value

  err_code = nrf_drv_gpiote_init();
  APP_ERROR_CHECK(err_code);

  nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_HITOLO(true);//16MHz clk
  in_config.pull = NRF_GPIO_PIN_PULLUP;

  err_code = nrf_drv_gpiote_in_init(BUTTON,&in_config,input_pin_handle);
  APP_ERROR_CHECK(err_code);

  nrf_drv_gpiote_in_event_enable(BUTTON,true);
}

/********************************************************************************
*event handler to update ble packet data
* TODO: FIX, DOES NOT WORK
********************************************************************************/
static void adv_data_update_timer_handler(void * p_context)
{
    ret_code_t                  err_code;
    ble_advdata_manuf_data_t    manuf_data;

    new_advdata.p_manuf_specific_data = &manuf_data;

    static uint8_t payload_index = 0;

    // TODO change payload index depending on ADC status of pin

    //NRF_LOG_INFO("Voltage read: " NRF_LOG_FLOAT_MARKER "\r\n", NRF_LOG_FLOAT(volts));

    if(volts > 2){
    
      payload_index = 1;
     
    }

    NRF_LOG_INFO("Updating advertising data!");
    
    manuf_data.company_identifier = APP_COMPANY_IDENTIFIER;

    //manuf_data.data.p_data = manufacturing_data_payload_list + payload_index;
   // manuf_data.data.size = PAYLOAD_SIZE;

    manuf_data.data.p_data = "1";
    manuf_data.data.size = 1;
    
    err_code = ble_advertising_advdata_update(&m_advertising, &new_advdata, NULL);
    APP_ERROR_CHECK(err_code);  
    
    /*if(payload_index == TOP_INDEX)
    {
        payload_index = 0;
    }
    else
    {
        payload_index++;
    }*/

    NRF_LOG_INFO("Advertising data updated!");

}


//6th step: gap initialization
static void gap_params_init(void){

  ret_code_t err_code;

  ble_gap_conn_params_t     gap_conn_params;
  ble_gap_conn_sec_mode_t   sec_mode;

  BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);

  err_code = sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *)DEVICE_NAME, strlen(DEVICE_NAME));
  APP_ERROR_CHECK(err_code);

  memset(&gap_conn_params, 0, sizeof(gap_conn_params));

  gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
  gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
  gap_conn_params.slave_latency = SLAVE_LATENCY;
  gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;

  err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
  APP_ERROR_CHECK(err_code);


}


//7th step: gatt initialization
static void gatt_init(void){

  ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, NULL);
  APP_ERROR_CHECK(err_code);
}


//step 9.1 error handler for queue writer
static void nrf_qwr_error_handler(uint32_t nrf_error){
  
  APP_ERROR_HANDLER(nrf_error);
}



//9th step: Initialize the services
static void services_init(){

  ret_code_t err_code;

  nrf_ble_qwr_init_t qwr_init = {0};

  qwr_init.error_handler = nrf_qwr_error_handler;

  err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init);
  APP_ERROR_CHECK(err_code);
 }


//step 10.1 create an event handler for connection parameters update
static void on_conn_params_evt(ble_conn_params_evt_t * p_evt){

  ret_code_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);

  }
  if(p_evt->evt_type == BLE_CONN_PARAMS_EVT_SUCCEEDED){
  
    
  }
}


//step 10.2 create an error handler for conn params update
static void conn_params_error_handler(uint32_t nrf_error){

  APP_ERROR_HANDLER(nrf_error);
}



//10th step: create a function for setting up the connection parameters
static void conn_params_init(void){

  ret_code_t err_code;

  ble_conn_params_init_t cp_init;

  memset(&cp_init, 0, sizeof(cp_init));

  cp_init.p_conn_params = NULL;

  cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;

  cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY;

  cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT;

  cp_init.disconnect_on_fail = false;

  cp_init.error_handler = conn_params_error_handler;

  cp_init.evt_handler = on_conn_params_evt;

  err_code = ble_conn_params_init(&cp_init);
  APP_ERROR_CHECK(err_code);


}



//step 8.1: create advertisement event handler
static void on_adv_evt(ble_adv_evt_t ble_adv_evt){

  ret_code_t err_code;

  switch (ble_adv_evt){
  
    case BLE_ADV_EVT_FAST:

    NRF_LOG_INFO("Fast advertising.");
    err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
    APP_ERROR_CHECK(err_code);
    break;

    case BLE_ADV_EVT_IDLE:
    NRF_LOG_INFO("advertising idle.");
    err_code = bsp_indication_set(BSP_INDICATE_IDLE);
    APP_ERROR_CHECK(err_code);

    default:
    break;
  }
}


//8th step: advertising initialization
static void advertising_init(void){

  ret_code_t err_code;

  ble_advertising_init_t init;

  memset(&init, 0, sizeof(init));

  //try manufac custom data in packet
  ble_advdata_manuf_data_t                  manuf_data; //Variable to hold manufacturer specific data
  uint8_t data[]                          = "2"; //Our data to advertise
  manuf_data.company_identifier           = 0x0059; //Nordics company ID
  manuf_data.data.p_data                  = data;
  manuf_data.data.size                    = sizeof(data);
  init.advdata.p_manuf_specific_data      = &manuf_data;

   //

 

  init.advdata.name_type = BLE_ADVDATA_FULL_NAME;

  init.advdata.include_appearance = true;

  init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;

  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);


}


//step 5.1: BLE event handler
static void ble_evt_handler(ble_evt_t const *p_ble_evt, void * p_context){

  ret_code_t err_code = NRF_SUCCESS;

  switch(p_ble_evt->header.evt_id){
  
    case BLE_GAP_EVT_DISCONNECTED:

    NRF_LOG_INFO("Device is disconnected.");

    break;

    case BLE_GAP_EVT_CONNECTED:

    NRF_LOG_INFO("Device is connected.");

    err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
    APP_ERROR_CHECK(err_code);

    m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;

    err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, m_conn_handle);
    APP_ERROR_CHECK(err_code);

    break;

    case BLE_GAP_EVT_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;

  }
}


//5th step: ble stack init
static void ble_stack_init(){

  ret_code_t err_code;
  
  err_code = nrf_sdh_enable_request();
  APP_ERROR_CHECK(err_code);

  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);

  err_code = nrf_sdh_ble_enable(&ram_start);
  APP_ERROR_CHECK(err_code);

  NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
}

//4th step: create a function to initialize the power management
static void power_management_init(void){

  ret_code_t err_code = nrf_pwr_mgmt_init();
  APP_ERROR_CHECK(err_code);
}


//3rd step: inialize bsp(leds)
static void leds_init(void){

  ret_code_t err_code = bsp_init(BSP_INIT_LEDS, NULL);
  APP_ERROR_CHECK(err_code);
}



//2nd step: initialize app timer
static void timers_init(void){

  ret_code_t err_code = app_timer_init();
  APP_ERROR_CHECK(err_code);

  err_code = app_timer_create(&m_adv_data_update_timer, 
                                  APP_TIMER_MODE_REPEATED, 
                                  adv_data_update_timer_handler);

  APP_ERROR_CHECK(err_code);

  //ADC SAMPLES
  err_code = app_timer_create(&m_app_timer_id, APP_TIMER_MODE_REPEATED, app_timer_handler);
  APP_ERROR_CHECK(err_code);

  //STAGE 2 BLINKY
  err_code = app_timer_create(&m_app_timer_id1, APP_TIMER_MODE_REPEATED, app_timer_handler1);
  APP_ERROR_CHECK(err_code);

}


/**@brief Function for starting timers.
 */
static void application_timers_start(void)
{
       ret_code_t err_code;
       err_code = app_timer_start(m_adv_data_update_timer, 
                                    ADV_DATA_UPDATE_INTERVAL, 
                                    NULL);
       APP_ERROR_CHECK(err_code);

       //ADC SAMPLES
       err_code = app_timer_start(m_app_timer_id, ADC_INTERVAL, NULL);
       APP_ERROR_CHECK(err_code);

       //STAGE 2 BLINKY
       err_code = app_timer_start(m_app_timer_id1, SECOND_STATUS_INTERVAL, NULL);
       APP_ERROR_CHECK(err_code);
}


//1st step: initialize the logger
static void log_init(){

  ret_code_t err_code = NRF_LOG_INIT(NULL);
  APP_ERROR_CHECK(err_code);

  NRF_LOG_DEFAULT_BACKENDS_INIT();
}

//step 4.1: idle state handler
static void idle_state_handle(void){

  if(NRF_LOG_PROCESS() == false){
    
    nrf_pwr_mgmt_run();
  }
}

//11th step: create a function which will start the advertisement
static void advertising_start(void){

  ret_code_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
  APP_ERROR_CHECK(err_code);

}



int main(void)
{
    log_init();

    timers_init();

    leds_init();

    saadc_init();

    gpio_init();

    power_management_init();

    ble_stack_init();

    gap_params_init();

    gatt_init();

    advertising_init();

    services_init();

    conn_params_init();

    NRF_LOG_INFO("BLE Base application started...");

    application_timers_start();

    advertising_start();

    bsp_board_init(BSP_INIT_BUTTONS);
    bsp_board_init(BSP_INIT_LEDS);


    // Enter main loop.
    while (true)
    {
      switch (status){
      
        case none:
 
          bsp_board_led_off(2);
         
          break;
        
        case 1: //if the button has been pressed once, turn led on
         
          bsp_board_led_on(2);

          break;

        case second://if the button has been pressed twice, toggle led every 5s
          
          //handled by app timer interrupt

          break;

        case third:

          bsp_board_led_off(2);

          break;
      }

      idle_state_handle();
    }
}
RE: How do I show the status of an LED with a ble advertising packet using nRF52840-dk?

Jared — Fri, 03 Sep 2021 07:31:24 GMT
Hi,
Are you planning to do a connection or just advertising(broadcasting)? If the former then you should setup a custom service, if the latter then you should use the manufacturing data field to display the data.
regards
Jared