Advertising Manufacturer data wrong after connect->disconnect

RE: Advertising Manufacturer data wrong after connect->disconnect

Joakim Jakobsen — Wed, 20 Jun 2018 12:29:13 GMT

Hi.

Sorry for the delay.

When you want to update the advertising data (both advertisement packet and/or scan response packet) without stopping the advertisement, you are correct in using the ble_advdata_set() function.
This will in turn call the sd_ble_gap_adv_data_set() to pass encoded advertising data to the stack.

When it comes to disable whitelist, you can take a look at this function; ble_advertising_restart_without_whitelist()
Note that this will restart the advertisment.

If you have any problems using these functions, you could try debugging your application to find out more exactly what going wrong.
If you can't find the answer to your issue by searching around devzone, you are more than welcome to post follow-up questions here, and I'll do my best to help you solve them.
Posting your code might help shed som light on what the issue might be.

Best regards,
Joakim.

RE: Advertising Manufacturer data wrong after connect->disconnect

ckoechli — Thu, 14 Jun 2018 08:22:57 GMT

I might have found the origin of the problem:

To update the advertising information, I was calling the functions advertising_stop to stop it, ble_advdata_set (ble_advdata.c) to update the manufacturer data and advertising_start (main.c of the ble_app_template example) to restart advertising.

The latter function calls ble_advertising_start passing m_advertising as a parameter. I then noticed that m_advertising was not updated by ble_advdata_set probably causing the trouble.

I also use the same advertising update function to suspend whitelisting (with m_advertising.whitelist_temporarily_disabled = true; ) and display a flag in the manufacturer data to tell the user that the peripheral is bondable.

In order to solve the problem, I replaced the call to ble_advdata_set with a call to advertising_init. I find it a bit ugly but at least it works.

I realy need to:

- enable and disable whitelisting

- update the manufacturer data

Is there a way to do it without stoping and restarting advertising ?

if not is there a way to do a cleaner implementation without rewriting the ble_advertising functions ?

Christian

RE: Advertising Manufacturer data wrong after connect->disconnect

Joakim Jakobsen — Thu, 07 Jun 2018 06:49:25 GMT

Hi!

So the advertising is stopped when you establish a connection. And it seems that when you disconnect and your application receives the disconnection event, the advertising is restarted using the original advertisment data.

I would take a look at how the disconnection event is handled, and make sure that the advertisment is started using the correct data.

Also, as a side note; When posting a question on devzone, it is often easier to help solve your issue when information about which SDK, device, softdevice etc. is included in the question.

Let me know if you have any further questions.

Best regards,
Joakim.