Custom BLE profile creation

RE: Custom BLE profile creation

Edvin — Mon, 11 Nov 2024 10:07:48 GMT

Hello,

Not quite sure what you mean about that. Do you mean retransmissions? All packets are retransmitted until they are acknowledged by the receiver, meaning the received CRC of the packet is correct. If that doesn't happen for a given amount of time, the link will disconnect. This happens after a time called Supervision Timeout, which is a value that the peripheral and central agree on upon connection. Typically, in our samples, this is 4 seconds, but you can set your desired value using

CONFIG_BT_PERIPHERAL_PREF_TIMEOUT= units of 10ms units.

Best regards,

Edvin

RE: Custom BLE profile creation

pal_722 — Fri, 08 Nov 2024 08:44:14 GMT

Thank you for the reply!

Will try to implement and update the progress.

I have another doubt, do you know how long does the data remain over the air while transmitting data via BLE?
Is it something that we can control?

RE: Custom BLE profile creation

pal_722 — Fri, 08 Nov 2024 08:30:54 GMT

Ok. I'll try to check with that.
Thank you so much

RE: Custom BLE profile creation

Edvin — Wed, 06 Nov 2024 10:17:46 GMT

I agree with Turbo J , that the Nordic UART Service (NUS) is quite easy to modify to do what you want.

Alternatively, you can have a l look at the Bluetooth Low Energy course in Nordic's Developer Academy. This will take you, step by step, through the process of advertising, and creating your own custom service from scratch. What you will end up with is something close to the Led Button Service (LBS), which works pretty much like a light bulb / light switch combo, but knowing how to set this up from scratch, together with having a peek at the peripheral_uart sample that implements the NUS, you should be able to set up your own custom service that can send strings of data.

Best regards,

Edvin

RE: Custom BLE profile creation

Turbo J — Tue, 05 Nov 2024 10:51:03 GMT

The NUS service is a non-standard profile and not terribly difficult to customize. Alternatively you could just use it directly with your app - but I recommend using at least a different UUID.