Re: BLE OOB - pairing/bonding - local-oob - HCI UART Zephyr issue?


Hi Johan,

Thanks for clarifying this one out, that is already a great relief. Honestly I'm a little bit stuck with what I want to do about security in my BLE architecture.
So far I was able to combine a number of technologies on different HW boards each running different SW stacks. 
However when trying to start implementing security I'm getting stucked. 

So what I had in mind as proof of concept for my setup:
  • On a BBB running Linux 4.20 I run a BLE central application based on QT BLE SW, connected to this BBB is a nRF52 DK running Zephyr and the hci_uart BLE connectivity stack.
  • On another nRF52 board I'm running the Zephyr  HR demo peripheral application. 
  • The BLE central application can successfully connect to the HR demo application and read out the simulated HR values.

Now I wanted to add security, so far QT BLE has not explicit way of providing this, so I'm having to do it outside the QT BLE stack (unfortunately...).
As I will not have any input or output device for verification, the idea is to implement NFC OOB unless you already say this is not an option. 

So the idea is first to tryout a setup without the NFC functionality for exchanging the data.
Thus my idea was first:
to readout the local OOB of both devices and to exchange them "manually" by running the remote oob command via the btmgmt tool of BlueZ.

However despite the SSP issue I wrongly thought needed to be set. I see that also the btmgmt complains when trying to readout de local oob data.
As mentioned in my previous post, the btmgmt throws an error saying it is not supported to Read Out Local OOB info.

So here ends my story for the moment...

Any "better" idea's how to continue from here.
Honestly I love the concept of the Zephyr BLE connectivity as it allows us to keep on the "open source" BlueZ track. Also being able to use QT for running the BLE stack is a great advantage and speeds up the development work and also the quality of the implementation.
Nevertheless also the Zephyr project is also great way to go in our BLE design we have in mind.  So keep up the good work, we love it!!! 

Thanks in advance for your help on this topic.

Best regards,

Best regards,

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