Is it possible to record HCI logs using nRF52840?

[Michael-1965]

Hi all.

I have written an application using a softdevice and I want to analyse an interesing behavior I don't understand at the moment.
So I want to record a trace/log of the used HCI commands to see what's going on on deeper levels.

Is this possible?

Thanks in advance
Cheers Michael

[Michael-1965]

HI Vidar.

I have used your code to monitor the not resolved advertised addresses.
My address to resolve is not listed in this list.
This means the address has been resolved immediately after the first appearance? Right?

But it is still possible that the connection-request it not sent immediately after resolving the address after the same advertisement.
How long does it take to resolve a random address? Maybe it takes too long, so the next advertisement has to be used for the connection request or the connect request can't be sent just after resolving the address due to other limitations.

Cheers Michael

[Vidar Berg]

Hi Michael,

The address resolving happens on the fly.

Michael-1965 said:

My address to resolve is not listed in this list.

The application is responsible for managing the list, and it should contain IRK for your peer device, not the address. Does the "input address" ever match your address though?

Cheers,

Vidar

[Michael-1965]

On the fly: this means much faster than 150us?

Yes, the IRK is visible in the list, but I don't see the advertised address of my device as "input address".
But Nordic has connected to my device.

I use white lists.

[Vidar Berg]

It takes typ. 48 us according to the PS here: AAR Electrical Specification, fast enough to resolve addresses in real-time.

Michael-1965 said:

I don't see the advertised address of my device as "input address".
But Nordic has connected to my device.

Can you post a sniffer trace that shows the connect request?

 

[Michael-1965]

2766.Test.zip
I have made a trace, recorded the logs and added a screenshot with some explanations.
GPIO lines for button press and led display are also included in the trace. When the LED is enabled I would expect a connection request will already be sent during the first advertisement group.

Thanks in advance
Cheers Michael

[Vidar Berg]

Thank you. However, I'm not seeing any connection requests in the trace you sent. Is the LED and BUTTON signals used to indicate activity on the scanner side? Either way I will have to take a closer at this Monday.

[Michael-1965]

Yes, the Nordic board is a kind of remote control. A button is pressed, the led is enabled and a command is sent

.

Have a nice weekend.

Cheers Michael