How to broadcast raw data in beacon mode?

[GeekGeek1192]

Hello,

             I am using PCA10040 DK for the programming with ble_app_beacon_pca10040_s132 example code. I want to broadcast my 20 bytes of data with my 0xFFE0 UUID.

In this example, I am trying to modify the m_beacon_info[] buffer with my custom data and want to broadcast directly raw data, But could not able to do that if I change any in m_beacon_info[] buffer code does not work, ble_advdata_encode() function does not initialise properly? I don't want to use any service, just want to transmit 20 bytes directly. Is this possible?

Can anyone tell me if yes? how to do that?

Thanks in advance!!

[Kazi Afroza Sultana]

Hello Asish,

Is there any error_code shows (err_code !=0) non-zero value after calling your function?  

Best Regards,

Kazi Afroza Sultana

[GeekGeek1192]

fatal error and the device keep on restarting... I have done the below changes . now I am able to transmit my custom data over BLE so that this can be able to see on NRF connect app in RAW data...

uint8_t BC_advertData[31] =
{
// Flags; this sets the device to use limited discoverable
// mode (advertises for 30 seconds at a time) instead of general
// discoverable mode (advertises indefinitely)
0x02,   // length of this data      //[0]
GAP_ADTYPE_FLAGS,                   //[1] //GAP_ADTYPE_FLAGS_BREDR_NOT_SUPPORTED,
0x04,// [2]
0x03,   // length of this data          // [3]
GAP_ADTYPE_16BIT_MORE,      // some of the UUID's, but not all // [4]
LO_UINT16(Default_UUID),            // [5]
HI_UINT16(Default_UUID),            // [6]
0x17, // length of this data including the data type byte       // [7]
GAP_ADTYPE_MANUFACTURER_SPECIFIC, // manufacturer specific adv data type // [8]
 0x01, // mac 1                 [09]
 0x02, // mac 2                 [10]
 0x03, // mac 3  //             [11]
 0x04, // mac 4//               [12]
 0x05, // mac 5 //              [13]
 0x06, // mac 6 //              [14]
 0x40, // Temperature Msb   //  [15]
 0x89, // Temperature lsb //    [16]
 0x15, // Humidity Msb //       [17]
 0x58, // Humidity lsb //       [18]
 0x12, // Pressure Msb //       [19]
 0x34, // Pressure lsb //       [20]
 0x22, // Surface Temp Msb  //  [21]
 0xF4, // Surface Temp lsb //   [22]
 0x32, // Battery         //    [23]
 0xFF, // ON/OFF Duration MSB   [24]        //Ambient Light MSB
 0xFF, // ON/OFF Duration NEXT  [25]        //Ambient Light next
 0xFF, // ON/OFF Duration LSB   [26]         //Ambient Light LSB
 0x00, // Motion Event Flag //  [27]
 0x00, //  ON/OFF COUNT MSB     [28]
 0x00, //  ON/OFF COUNT NEXT    [29]
 0x00 //   ON/OFF COUNT LSB     [30]
};

/**@brief Struct that contains pointers to the encoded advertising data. */
static ble_gap_adv_data_t m_adv_data =
{
    .adv_data =
    {
        //.p_data = m_enc_advdata,
        .p_data = BC_advertData,
        .len    = BLE_GAP_ADV_SET_DATA_SIZE_MAX
    },
    .scan_rsp_data =
    {
        .p_data = NULL,
        .len    = 0

    }
};


static void advertising_init(void)
{
    uint32_t      err_code;
   
   ble_gap_addr_t device_addr;
 
  
    memset(&m_adv_params, 0, sizeof(m_adv_params));

    m_adv_params.properties.type = BLE_GAP_ADV_TYPE_NONCONNECTABLE_NONSCANNABLE_UNDIRECTED;
    m_adv_params.p_peer_addr     = NULL;    // Undirected advertisement.
    m_adv_params.filter_policy   = BLE_GAP_ADV_FP_ANY;
    m_adv_params.interval        = NON_CONNECTABLE_ADV_INTERVAL;
    m_adv_params.duration        = 0;       // Never time out.
   

    //err_code = ble_advdata_encode(&advdata, m_adv_data.adv_data.p_data, &m_adv_data.adv_data.len);
    //APP_ERROR_CHECK(err_code);
    //if(err_code == NRF_SUCCESS)
    //{
    //       NRF_LOG_INFO("ble_advdata_encode init successful !");
    // }else
    // {
    //      NRF_LOG_INFO("ble_advdata_encode init failed !");
    // }
    //err_code  =    sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV,,4);               // +4dB Tx power was set for transmission    
    //APP_ERROR_CHECK(err_code);
        sd_ble_gap_addr_get(&device_addr);
	BC_advertData[MAC_1]=device_addr.addr[5];			 //MAC ADDRESS
	BC_advertData[MAC_1+1]=device_addr.addr[4];
	BC_advertData[MAC_1+2]=device_addr.addr[3];
	BC_advertData[MAC_1+3]=device_addr.addr[2];
	BC_advertData[MAC_1+4]=device_addr.addr[1];
	BC_advertData[MAC_1+5]=device_addr.addr[0];
     err_code = sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data, &m_adv_params);
    //APP_ERROR_CHECK(err_code);

   if(err_code == NRF_SUCCESS)
    {
     NRF_LOG_INFO("sd_ble_gap_adv_set_configure init successful !");
     }else
     {
      NRF_LOG_INFO("sd_ble_gap_adv_set_configure init failed !");
     }
}

[Kazi Afroza Sultana]

Hello Ashish,

You can add ''Debug'' in your preprocessor definition.  

 

One thing is you have to uncomment the APP_ERROR_CHECK(err_code) from the code. It needs in the code so that developer can recognize what function does not execute properly.

For example, if we comment out APP_ERROR_CHECK(err_code) after

err_code= sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data, &m_adv_params); it will not crash but the advertisement will not be set according to configuration.

Because we do not know whether NRF_SUCCESS (==0) or some error. then the following line of codes will not work properly.

if(err_code == NRF_SUCCESS)
{
NRF_LOG_INFO("sd_ble_gap_adv_set_configure init successful !");
}else
{
NRF_LOG_INFO("sd_ble_gap_adv_set_configure init failed !");
}

You can see the consequence after doing these changes in your application and let us know.

Hope it helps. Have a nice weekend.

Best Regards,

Kazi Afroza Sultana

[GeekGeek1192]

Hello,

         It worked. Now I am able to tx the raw data over BLE in beacon mode without using the ble_advdata_encode() function.

Thanks.

[Kazi Afroza Sultana]

Glad to hear that. :) Good Luck.