Extended advertising and central role compatibility

RE: Extended advertising and central role compatibility

AritzM — Mon, 03 Jan 2022 16:00:58 GMT

Hi Hung,

That is correct. I have two boards running the same code and I enable/disable advertising with a couple of buttons.

I have done several tests by changing advertising and scanning intervals and I can confirm that advertising packets on both 1M and Coded PHY are being detected. I guess there is a compromise with the scanning and advertising intervals.

I am happy to close this ticket Hung.

Thank you very much for your time and support.

Regards,

RE: Extended advertising and central role compatibility

Hung Bui — Mon, 03 Jan 2022 14:13:01 GMT

Hi Artisz,

Just to clarify, issue with scanning, do you have the issue if you don't do advertising on device A and only do scanning ? Have you tried to reduce the advertising interval on device A ?

I assume you have verified that device B was actually doing some advertising (using a phone for example).

RE: Extended advertising and central role compatibility

AritzM — Mon, 03 Jan 2022 13:04:13 GMT

Hi Hung,

Thank you very much for your reply.

I have done a couple of tests and that fixes the first error I had. I can enable now both advertising sets in 1M and coded PHY at the same time.

However, unfortunately I am still seeing the second error: device A scanning does not detect Coded PHY advertising packets from device B if advertising is enabled on device A.

Could you please double check that error with the R&D team?

Regards,

RE: Extended advertising and central role compatibility

Hung Bui — Mon, 03 Jan 2022 12:35:15 GMT

Hi Aritz,

I have received a tip from the R&D team. You should be able to fix the issue by configure:
CONFIG_SDC_SLAVE_COUNT=2 or more.

This by default is 1 and it only allows one slave connection. (I assume this is ignored when CONFIG_BT_CENTRAL =n)

RE: Extended advertising and central role compatibility

AritzM — Mon, 03 Jan 2022 08:59:42 GMT

Morning Hung,

Do you have any updates on this ticket please?

Thanks,

RE: Extended advertising and central role compatibility

Hung Bui — Thu, 30 Dec 2021 13:24:08 GMT

Hi Artiz,
Thanks for the code. I have reproduced the issue here. I have sent the question to our Bluetooth team and will keep you updated if I have an answer from them.
Happy New Year !

Hung

RE: Extended advertising and central role compatibility

AritzM — Thu, 23 Dec 2021 17:21:59 GMT

Hi Hung,

I am finishing for today and 2021 year. I will be back to work the 3rd of January.

Thanks for your time.

Happy New year!

Regards

RE: Extended advertising and central role compatibility

AritzM — Thu, 23 Dec 2021 16:26:07 GMT

Hi Hung,

Apologies my network connection is not very good today and I am having problems to upload the whole "build" folder.

I have uploaded just the code and settings files.

If you send me an email address, I could send you the whole project.

Regards,

RE: Extended advertising and central role compatibility

AritzM — Thu, 23 Dec 2021 16:11:38 GMT

devzone.nordicsemi.com/.../reactec_5F00_test_5F00_nrf52840.rarHi Hung,

I managed to reproduce the two errors I am seeing in our custom board with a nRF52840 evaluation board.

1. When enabling the second advertising set, bt_le_ext_adv_start() function is giving BT_HCI_ERR_CONN_LIMIT_EXCEEDED error and advertising is not started.

2. When enabling one only set of advertising (either legacy advertising or extended one in Coded/"M PHY), the scanning code stops working on Coded/2M PHY, it does not detect advertising packets.

Please find attached the whole project folder. Please copy it into "ncs\v1.8.0\nrf\samples\bluetooth" folder.

RE: Extended advertising and central role compatibility

AritzM — Thu, 23 Dec 2021 12:45:45 GMT

Hi Hung,

Thanks for your response.

I have double checked CONFIG_BT_MAX_CONN in autoconfig.h file and it is set to 10 as well.

At the moment I am working with a custom board, let me build the project to run in the nRF52840-DK board and I will send the whole project to you.

Please find attached autoconf.h file.

devzone.nordicsemi.com/.../1184.autoconf.h

RE: Extended advertising and central role compatibility

Hung Bui — Thu, 23 Dec 2021 12:32:50 GMT

Hi Aritz,

Could you double check in autoconfig.h that's generated by compiling, to see if CONFIG_BT_MAX_CONN is set to 10 or something else?
I suspect that there could be the chance that the BLE controller was not configured to support more than 2 connections.

Could you send the full project so we can compile and test here ?