Unable to connect to Samsung S21

RE: Unable to connect to Samsung S21

ovrebekk — Fri, 12 Jul 2024 08:00:45 GMT

Hi Glenn

If you are still having problems with this I would recommend opening a new ticket. This is actually my last day in Nordic, and I won't be able to follow up unfortunately.

Best regards
Torbjørn

RE: Unable to connect to Samsung S21

GJChristman — Wed, 26 Jun 2024 15:26:55 GMT

Hi folks,

I am having the same issue with my Samsung S21 Android 14 phone not connecting to one of my projects. My old S9, Galaxy TAB10, and iPhone all connect it it with no problem.

The project device is an NRF52832 SOC running code based on the samples and the V2.3 toolchain. I've tried another of the same devices compiled with the V2.6.1 toolchain with the exact same results.

I can supply Pcap file generated with the NRF Sniffer that might help shed some light on this issue if you could tell me where to upload it.

Thanks for your help!

-Glenn

RE: Unable to connect to Samsung S21

ovrebekk — Wed, 19 Jun 2024 07:57:07 GMT

Hi Jonas

The link you point to is from 2017, and while it is true that a much older version of the Zephyr controller was qualified, the later versions are not.

It is true that the documentation today doesn't properly state this limitation, and we are planning to improve this in a future update. The plan is to include a text like the one below:

The SoftDevice Controller is the supported Bluetooth controller in the nRF Connect SDK. Application examples in the SDK use the SoftDevice Controller as the default controller, and it is the controller used for release testing of the SDK. The Bluetooth support includes:

Implementation of new Bluetooth LE controller features.
Valid qualification (QDID) for each SDK release.
Support request can be addressed on Devzone (link)

The Zephyr Bluetooth LE Controller is a community supported Bluetooth controller which is part of the Zephyr Project. It is the default Bluetooth controller when using Zephyr RTOS stand-alone. It is possible to configure projects in nRF Connect SDK to use the Zephyr Controller, but Nordic Semiconductor do not intend to support this configuration for production.

Best regards
Torbjørn

RE: Unable to connect to Samsung S21

_jonas_ — Tue, 18 Jun 2024 13:10:57 GMT

Hi Torbjørn,

I'm quite happy with the Zephyr LL Controller since it also shrinks down the image size by a lot. I did some searching online but could not find any information on it not being qualified for certification. Can you give me some more insights into this. Maybe an article or a forum post? I found this Building a qualified BLE Controller with Zephyr OS 1.9++ which suggests the opposite does't it?

Anyway I will do the sniffing tomorrow and let you know about the results.

Jonas

RE: Unable to connect to Samsung S21

ovrebekk — Tue, 18 Jun 2024 10:16:49 GMT

Hi Jonas

I would not recommend using the Zephyr controller in a production design, as it doesn't have the necessary Bluetooth qualification needed to certify your product.

If you are able to share a sniffer trace showing both the non working SoftDevice based implementation and the working one based on the Zephyr controller I can share it with the Bluetooth developers, and try to get to the bottom of the issue.

Best regards
Torbjørn

RE: Unable to connect to Samsung S21

_jonas_ — Mon, 17 Jun 2024 19:50:47 GMT

Hello, thank you for your answer and sorry for the late reply.

I managed to fix the problem by using Zephyr's Link Layer library instead of the Nordic Softdevice.

Kind regards

Jonas

RE: Unable to connect to Samsung S21

ovrebekk — Mon, 10 Jun 2024 08:54:14 GMT

Hi Jonas

What kind of application are you running on the peripheral side? Is it based on one of the standard SDK samples?

Would you be able to capture a sniffer trace when the issue occurs, so we can look into it in more detail?

If you don't have a professional Bluetooth sniffer available it is possible to use the nRF Sniffer.

Best regards
Torbjørn