Project fall with repeatedly call nrf_ble_scan_start(&m_scan);

[devcolorama]

Hi!
SDK17.1 S132 nRF52832

I use hrs_c example and it works. But I added adertising code and wanna use both central and periperial at same time. Works, but until the moment when I make connect to my central and disconnect. After disconnect I start 

nrf_ble_scan_start(&m_scan);

again and got 

NRF_BREAKPOINT_COND;

project fall inside 

ret_code_t nrf_ble_scan_start(nrf_ble_scan_t const * const p_scan_ctx)

function.

I can't understand the reason.

There is no any warnings regarding memory in RTT debagger.

So, how to use both central and peripherial at same time? I used it before on SDK15.

[Einar Thorsrud]

Hi,

NRF_BREAKPOINT_COND;

Were is this? In the error or hardfault handler? If so, can you check from which file name and line number you ended up there? And assumign it was form an error check, which error code was it?

[devcolorama]

[Einar Thorsrud]

Hi,

You say the error happen within nrf_ble_scan_start() and wth the error code and stack trace in mind, the error code 0x3204 matches BLE_ERROR_GAP_DEVICE_IDENTITIES_IN_USE which shoud only be returned from sd_ble_gap_device_identities_set(). This is indirectly called via the peer manager's pm_device_identities_list_set() function, so perhaps this is it? (if using a whitelist, you will get a NRF_BLE_SCAN_EVT_WHITELIST_REQUEST event as a callback after calling nrf_ble_scan_start(), and upon that you typically call pm_device_identities_list_set().

It looks like you are experiencing the same as in this post? In short, you cannot change the identity while it is being used. 

[devcolorama]

Hi!

Thanks for the answer.
I used white list with scanning. How can I fix this error? 
But this error appears when I have added peripherial mode also. WO this mode- only scan- works properly, I able to recall nrf_ble_scan_start many times.
But with added periperial mode- advertising- I got this error on 2nd call nrf_ble_scan_start.

Sorry, I can't understand you what should I fix?

[Einar Thorsrud]

The key is that you cannot chagne the identity while it is being used. I do not have an overview of what you do, but most likely the problem is that you are also advertising. If so, stop advertising first.

[devcolorama]

Which identity I changed? 
Why If I comment advertising code- all works?
Therefore, I didn't change any identity when I start scan again.
The reason in additional advertising code.

Ok, what should I check also? Which code need I check for figure out it?

I don't remember that in SDK15, for example, I had same problem. I advertised and run scan again and it worked.

So, any idea what should I check?

[Einar Thorsrud]

Hi,

You update the whitelist when you start scanning. This is shown in the stack trace, and is the same as what happened in this case. And it is not allowed to chagne this while in use. The most straight-forward would be to stop advertising before you start scanning (as that involves updating the whitelist), or not using whitelist in one of the cases.

[devcolorama]

Hi!

Do you mean, I use white list for advertising?

If first I make start scanning (already whtelist should be implemented with scanning), and 2nd I run advertising with whitelist. 

I don't need whitelist with advertising. 

But if I correct understood you, start advertising will involves updating the whitelist. Correct?