nRF5340 - Bluetooth constantly disconnects

[MartaOp]

Hi, 

I've tried the Heart Rate sample code (both from hex and source file) and in both cases, I encounter the same problem - constant disconnection. When it finally connects it's fine but most of the time it looks like this:

To connect I'm using a phone with Android  8.0.0.

Source code is taken from master branch (https://github.com/nrfconnect/sdk-nrf/tree/master) but I checked from 1.3.0 too with the same result.

For programming, I've used Segger Embedded Studio v4.52. 

Thanks, 

Marta

[Øyvind]

Hello Marta, 

I assume you are using the Bluetooth: Peripheral HR found under the Zephyr samples? It does not look like this has been tested with nRF5340. I would recommend looking at the official tested Bluetooth samples found under NCS samples. Have you tried any of these?

Thanks!

Kind regards,
Øyvind

[MartaOp]

Hi Øyvind,

Yes, I've tried Bluetooth: NFC pairing and Bluetooth: Peripheral HIDS mouse - in both cases I struggle to connect. 

I've also checked hex files Hear Rate Demo (https://www.nordicsemi.com/Software-and-tools/Development-Kits/nRF5340-PDK/Download#infotabs) and again the connection is unreliable.

Thanks,

Marta 

[Øyvind]

Hi Marta, 

Thanks for the update. I will talk to our developers and get back to you within today or Monday. 

Kind regards;
Øyvind

[MartaOp]

Thank you!

[Øyvind]

Hi Marta, 

Can you please add the following line to prj.conf

CONFIG_BT_LL_NRFXLIB=y

Let me know how that works for you.

-Øyvind