Re: advertising data


Tamra <tamrako@...>
 

Hi all,

Thanks for the help. From what I can tell "ad" from  "struct net_buf_simple *ad" is the payload, and so I'm wondering what format is the payload in. (i.e if i convert it to binary where in the Bluetooth spec can I find what these values mean?

Thanks,
Tamra


On Tue, Jun 26, 2018 at 6:37 AM, Johan Hedberg <johan.hedberg@...> wrote:
Hi,

On Tue, Jun 26, 2018, Luiz Augusto von Dentz wrote:
> > On Tue, Jun 26, 2018 at 3:55 AM, Tamra <tamrako@...> wrote:
> >> I'm looking at the central_hr example. I was wondering what information is
> >> packed into the net_buf_simple *ad? The function and output is below.
> >>
> >> static void device_found(const bt_addr_le_t *addr, s8_t rssi, u8_t type,
> >>              struct net_buf_simple *ad)
> >>
> >> [DEVICE]: 34:3c:99:ab:65:6d (random), AD evt type 3, AD data len 31, RSSI
> >> -83 data: 2818606536
> >
> > The type you will be able to find in the assigned number for GAP:
> >
> > https://www.bluetooth.com/specifications/assigned-numbers/generic-access-profile
> >
> > AD payload format for each type is described in the CSS, for instance
> > type 3 is <<Complete List of 16-bit Service UUIDs>> which consists in
> > a list of 16-bit Service UUIDs.
>
> Actually the event type is no the AD type, sorry about that, so 0x03
> refers to BT_LE_ADV_NONCONN_IND.

I'd like to add here that we've just merged a new helper API for parsing
the advertising data:

        https://github.com/zephyrproject-rtos/zephyr/pull/8560

This pull request also included updating the central_hr sample, so you
might want to take a second look at that code.

Johan

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