advertising packets include gatt attribute data

RE: advertising packets include gatt attribute data

Abner — Wed, 16 Mar 2022 02:30:03 GMT

Hi,

Ok i got it, it helped me a lot,thank you!

Best regards,

Alan

RE: advertising packets include gatt attribute data

Einarh — Mon, 14 Mar 2022 10:30:19 GMT

Hello!

All of the characteristic property values, including "broadcast property" are only relevant if you are planning to establish a connection.

These values are meant to give information about the characteristics you're sharing to the devices you connect to, so if you're planning to only broadcast these values will never be used.

The "Service Data AD Type" is a formatting type for your advertising data. You can place data you want to broadcast in a data field like this, but you'll have to update it manually, for instance with ble_advertising_advdata_update().

Hope this clears things up,

Einar

RE: advertising packets include gatt attribute data

alanking — Sat, 12 Mar 2022 02:44:33 GMT

Hi：

yes，ble_advertising_advdata_update() it does work，but i do not want to use it，I am looking for another possible way，for example using the “Broadcast property”，it said “If set, allows this characteristic value to be placed in advertising packets, using the Service Data AD Type”，so I think this might be a possible way.

But I may have misunderstood the concept of “Broadcast property” and “Service Data AD Type”，if so，what is their meaning exactly，i want to figure it out，and are there any reference examples for these two concepts？

Thanks again！

RE: advertising packets include gatt attribute data

Einarh — Fri, 11 Mar 2022 12:25:16 GMT

Why would ble_advertising_advdata_update() not work for your application?

Don't you just want to change the data in the advertisement, or am I misunderstanding?

If I've misunderstood, can you please explain what you are trying to do?

-Einar

RE: advertising packets include gatt attribute data

alanking — Fri, 11 Mar 2022 09:34:32 GMT

Hi!

Thank you for your reply,I just checked the Beacon project,it seems to broadcast fixed datas using the manufacturer AD type，but what I want to achieve is a dynamic broadcasting that the broadcast data follows the change of the characteristic attribute value.

I know there is a way to dynamically update broadcast data using the function "ble_advertising_advdata_update()" ,but it requires application participation,does the softdevice supports automatic update of broadcast data according to the "add_char_params.char_props.broadcast = 1" ?

And again am I misunderstanding the meaning of Service Data AD Type and Broadcast Property?

thank you！

RE: advertising packets include gatt attribute data

Einarh — Fri, 11 Mar 2022 08:57:09 GMT

Hello!

Yes this should be possible, it sounds like you want to use your peripheral unit as a beacon.

Have you looked at the Beacon transmitter sample application?

Best regards,

Einar