User/custom data in advertising packets?

RE: User/custom data in advertising packets?

Somesh Burkule — Wed, 19 May 2021 12:11:03 GMT

Hi,

Is it possible to make custom service and advertise instead of Manufacturer Specific Data? we don't have 16bit company identifier.

RE: User/custom data in advertising packets?

Nikita — Thu, 14 Aug 2014 12:37:46 GMT

Yes, you can send data like this. If your data is related to some service then you can send it as service data (for example send current battery state info related to battery service). See this: devzone.nordicsemi.com/.../

RE: User/custom data in advertising packets?

michurin — Thu, 14 Aug 2014 11:51:30 GMT

Does it make sense to output data in such way?

RE: User/custom data in advertising packets?

Nikita — Thu, 14 Aug 2014 06:27:08 GMT

If you're asking whether you can update your manufacturer specific data by calling advertising_init(adv_flags, new_data_val) then yes, you can do it like this.

RE: User/custom data in advertising packets?

michurin — Thu, 14 Aug 2014 02:19:30 GMT

Does it make any sense if I want to output some value via advertising package to use manufacturer specific data? if so, then

typedef union {
    uint8_t  adv_manuf_data_data[1];
    int16_t  val;
} actual_data_u;
   /*****/
static void advertising_init(uint8_t adv_flags, int16_t val) 
{
    actual_data_u my_data;
  /****/  
   actual_data.val = val;
   adv_manuf_data_array.p_data = my_data.adv_manuf_data_data;
   adv_manuf_data_array.size = sizeof(adv_manuf_data_data); 
   /****/
}

When I need to change then I'll call this function again.

Thank you.

RE: User/custom data in advertising packets?

leo — Fri, 20 Jun 2014 11:34:35 GMT

thx :) it works now!

RE: User/custom data in advertising packets?

leo — Sun, 15 Jun 2014 12:10:45 GMT

hi Torbjørn,

unfortunately the attachment isn't available any more. Could you please upload it again? Thanks in advance! :)

RE: User/custom data in advertising packets?

ovrebekk — Thu, 14 Nov 2013 16:08:08 GMT

I am glad I could be of assistance ;)

RE: User/custom data in advertising packets?

Maximilian Müller — Mon, 04 Nov 2013 20:54:14 GMT

Hi Torbjørn,

Thanks for the hint.

I used the "NRF_FICR->DEVICEADDR[0]" and "NRF_FICR->DEVICEADDR[1]" lines of code in order to retrieve the Device address and then I send it as part of the manufacturerSpecificData together with the company ID. (in the advdata_update routine of the ble_app_temp project)

Thank you,

Cordially,

Maximilian Müller

RE: User/custom data in advertising packets?

Ole Morten — Fri, 16 Aug 2013 10:04:21 GMT

Please note that Pål is a stack developer, and doesn't know the SDK very well. :-) He therefore focuses on how the softdevice API is made.

If you use the SDK, you're most likely better off looking at Torbjørn's answer below, as the SDK wraps up the setting of advertisement data quite nicely. By using it, you can set the data up in C structs instead of pure data arrays. Take a look at the ble_advdata_t type, and especially its p_service_data_array and p_manuf_specific_data fields.

RE: User/custom data in advertising packets?

ovrebekk — Thu, 15 Aug 2013 12:31:40 GMT

For a small example of how to include manufacturer specific data in the advertise packet please have a look at the attached example. It is based on the HRS example in the SDK, the only change is to the advertise packet.

Regards Torbjørn

ble_app_hrs_manufacturer_data.zip

RE: User/custom data in advertising packets?

Pål Håland — Thu, 15 Aug 2013 11:39:34 GMT

When I refer to GAP then I'm talking about the Bluetooth 4.0 Specification - Volume 3, Part C,

Specification can be found here: https://www.bluetooth.org/en-us/specification/adopted-specifications

RE: User/custom data in advertising packets?

sd — Wed, 14 Aug 2013 12:13:15 GMT

Where exactly are you referring to when you say "GAP (11.1)"?

RE: User/custom data in advertising packets?

Pål Håland — Wed, 14 Aug 2013 12:03:32 GMT

The first byte is the length of this field, the second one is the ID for manufacturer specific data.

Have a look at GAP (11.1) for information on how do do this information.

RE: User/custom data in advertising packets?

sd — Wed, 14 Aug 2013 12:02:18 GMT

Thanks! What would 'Service Data' look like? (Some of these fields are a mystery to me... what do the first two bytes mean?)

RE: User/custom data in advertising packets?

Pål Håland — Wed, 14 Aug 2013 12:00:05 GMT

uint8_t adv_data[] = {0x07, 0xFF, (COMPANY_ID & 0xFF), ((COMPANY_ID >> 8) & 0xFF), 0x01, 0x02, 0x03, 0x04, 0x05};

this is Manufacturer Specific Data, data length 5, don't think we have any examples using this

RE: User/custom data in advertising packets?

sd — Wed, 14 Aug 2013 11:54:07 GMT

Are there an example of this working? I can't find any use of these structures in the SDK. My attempts so far don't work.

RE: User/custom data in advertising packets?

Pål Håland — Wed, 14 Aug 2013 10:35:58 GMT

It should be reflected immediately if I recall it correctly

RE: User/custom data in advertising packets?

sd — Wed, 14 Aug 2013 10:26:41 GMT

Thanks! Will changes to these fields be reflected immediately, or a stop/resume of advertising be needed?

RE: User/custom data in advertising packets?

Pål Håland — Wed, 14 Aug 2013 10:22:33 GMT

The best place to add user/custom data is in the field Service Data (GAP 11.1.10) if you have a 16bit UUID service or in the Manufacturer Specific (Data GAP 11.1.4) if you have a 16 bit company identifier