Best way to communicate user details from app to device over GATT?

RE: Best way to communicate user details from app to device over GATT?

nik2k — Wed, 04 Sep 2024 07:34:37 GMT

Yup I decided to go with a custom service + custom characteristics. I was a little unsure about the the permissions and properties to assign to the characteristics when setting up the server so I'll have a look at the service you mentioned and how they do things, for reference. Thanks.

RE: Best way to communicate user details from app to device over GATT?

Sigurd — Mon, 02 Sep 2024 07:46:34 GMT

Hi!

We have e.g. the User Data Service, that can have these characteristics:

Unfortunately, I don't' see any available ready implementation of this service.

https://www.bluetooth.com/wp-content/uploads/Files/Specification/HTML/Assigned_Numbers/out/en/Assigned_Numbers.pdf?v=1725262480086

But if you have your own phone app, then you will get more flexibility with your own custom service/characteristic. So in your use-case, I would recommend that approach.

RE: Best way to communicate user details from app to device over GATT?

billtsai — Wed, 28 Aug 2024 03:42:49 GMT

Hi,

You can use Data Length Extension to increase transfer size.

Following is Nordic academy article which explains Data length and MTU.

https://academy.nordicsemi.com/courses/bluetooth-low-energy-fundamentals/lessons/lesson-3-bluetooth-le-connections/topic/connection-parameters/