BLE connection problems with some Android devices

RE: BLE connection problems with some Android devices

JONATHAN LL — Thu, 30 Sep 2021 14:59:01 GMT

Hi,

Can see that there is a connection issue but not much more.

This is not a proper sniffer trace, but uncertain if it would shed much more light on the situation. I think this is a inaccuracy by the mobile phone, we do se this issue time to time.

you can read more bout the sniffer here: https://infocenter.nordicsemi.com/topic/ug_sniffer_ble/UG/sniffer_ble/intro.html?cp=10_5

Regards,
Jonathan

RE: BLE connection problems with some Android devices

John Henschel Jr — Mon, 20 Sep 2021 22:26:17 GMT

Hi, Jonathan!

We sniffered our BLE connection problem. I will add here our rtt_viewer_log and our nRF_connect_log (nRF Connect Desktop).

Could you please verify? Thanks!

devzone.nordicsemi.com/.../rtt_5F00_viewer_5F00_log.log devzone.nordicsemi.com/.../nRF_5F00_connect_5F00_log_5F00_2021_2D00_09_2D00_20T21_5F00_54_5F00_44.619Z_2D00_log.txt

RE: BLE connection problems with some Android devices

JONATHAN LL — Tue, 14 Sep 2021 14:59:21 GMT

Oki thanks for the update.

As for reason to why some phones might not work is because if the clock on the device is on the edge of what is ok and the phone is also somewhat inaccurate then the difference might be to big and the devices are not able to properly communicate. Sometimes phones use some cheaper components and the tolerances are not as good. This might be one reason for why Zen Fone 4, Xiaomi Mi Mix 3 do not seem to connect.

Where you able to test with more than one Zen Fone 4and Xiaomi Mi Mix 3 ?

Regards,
Jonathan

RE: BLE connection problems with some Android devices

Bruno Saraiva — Tue, 14 Sep 2021 14:30:31 GMT

It is a custom board, but the nRF IC is pre-assembled in a Fanstel BT40E module.
As for sniffing, I'll ask my colleague to check if he has a nRF52840 board at hand and we will get back here, just so that we can have some progress before waiting for the delivery of a dongle.

RE: BLE connection problems with some Android devices

JONATHAN LL — Tue, 14 Sep 2021 14:05:23 GMT

Hi Bruno,

There is no support for the nrf53 in nRF sniffer at the moment.

You can check out the dongle: Buy Nordic Semiconductor products online - nordicsemi.com

if it is a custom board\device are you using external crystals or the internal ?

Regards,
Jonathan

RE: BLE connection problems with some Android devices

Bruno Saraiva — Tue, 14 Sep 2021 11:36:41 GMT

Hi Jonathan, I'm part of this development group as well.

Can the nRF5340-PDK board be used with the Sniffer tool? If not, maybe the nRF5340-DK?
I looked at the list of boards here and those are not included, although I suspect they have the necessary hardware.
https://www.nordicsemi.com/Products/Development-tools/nRF-Sniffer-for-Bluetooth-LE
Regards

Bruno

RE: BLE connection problems with some Android devices

JONATHAN LL — Tue, 14 Sep 2021 11:07:35 GMT

Hi,

Is it a custom board?

Can you provide a sniffer trace?

Regards,
Jonathan