nrf52840, trying to use hci_usb application

RE: nrf52840, trying to use hci_usb application

maybe — Fri, 10 Nov 2023 08:00:44 GMT

yes, thank you for your help! wish u have a nice day.

RE: nrf52840, trying to use hci_usb application

Einar Thorsrud — Fri, 10 Nov 2023 07:57:21 GMT

I see. Then I guess things are mostly OK, except setting a static address. I am not able to figure out why you get the "Can't read local name " error message comes from, but it should not matter, and the sample should work out of the box and does so on my end as well (scanning, advertising, etc).

RE: nrf52840, trying to use hci_usb application

maybe — Fri, 10 Nov 2023 01:24:39 GMT

Hi,

I am trying to verify the Bluetooth functionality of the development board. Although I encountered an error message saying 'can't read the local name,' I found that I can actually scan for nearby devices using the command "hcitool lescan." Therefore, I believe there is no issue with the Bluetooth functionality. Thank you for your assistance and follow-up during this period.

RE: nrf52840, trying to use hci_usb application

Einar Thorsrud — Thu, 09 Nov 2023 15:07:34 GMT

Hi,

I have still not had any luck being able to set static address on Ubuntu 22.04, there is something fishy as it seems successful, also when observing from btmon. But the address is not used. I am still looking into it, though.

By the way, may I ask what you end goal is?

RE: nrf52840, trying to use hci_usb application

maybe — Tue, 07 Nov 2023 02:11:14 GMT

hi,

The first linux distrosis in 22.04 Ubunto, and i have tested it on OpenWrt 21.02, they got the same behavior.

RE: nrf52840, trying to use hci_usb application

Einar Thorsrud — Mon, 06 Nov 2023 15:10:46 GMT

Hi,

As mentioned, I see the same "Can't read local name on hci0: I/O error (5)" on my end. I have not been able to narrow down what causes this what causes this. The interface still works, tough.

Regarding setting a static address I see the same on Ubuntu 22.04. Regardless of which static address I configure, a random address is being used. I will look more in to it and get back to you.

In the mean time I wonder if you have tested on any other Linux distros and if you see a different behavior there?

RE: nrf52840, trying to use hci_usb application

maybe — Fri, 03 Nov 2023 02:17:13 GMT

hi,

i changed the hci_usb example into unmodified edition, but when i try to set the static address for the bt device, though there are no errors, the information of the devices stated that the address is not changed. Because it shows that setting the static address is successful here, but after powering on, it displays the initial address again. I suspect that the address is being reinitialized when the 'power on' command is executed. Is this a possibility?

RE: nrf52840, trying to use hci_usb application

maybe — Fri, 03 Nov 2023 01:10:44 GMT

hi,

Does that mean i should not trying to revice the bluetooth address in main.c file, but using the command line like what you did.

RE: nrf52840, trying to use hci_usb application

Einar Thorsrud — Thu, 02 Nov 2023 14:25:13 GMT

Hi,

I see the same "Can't read local name on hci0: I/O error (5)" on my end using Ubuntu 22.04 and nRF Connect SDK 2.5.0, with the unmodified hci_usb example. I have not been able to narrow down what cause this, though. That said, I am not seeing any issues, using btmgmt (as explained in this old post) the controller works.

I also expect you should be able to set the static address there without modifying the controller, doing something like this:

    power off
    static-addr cc:00:00:00:00:00
    power on

RE: nrf52840, trying to use hci_usb application

maybe — Thu, 02 Nov 2023 09:59:33 GMT

Thanks for replying, in prj.conf file, i added following configuration

CONFIG_BT_CTLR=y

CONFIG_BT_LL_SW_SPLIT=y

CONFIG_LOG=y

CONFIG_LOG_BACKEND_RTT=y

CONFIG_LOG_MODE_DEFERRED=y
and changed CONFIG_CONSOLE from n to y.
In the main.c file, i added a header file, and I added a few lines of code to the original int main() function

#include <ll.h>

int main(void)

{

int ret;

int btaddr;

uint8_t arr[] = {0xDE, 0xAD, 0xBE, 0xEF, 0x12, 0x34};

btaddr = ll_addr_set(0, arr);

#if defined(CONFIG_USB_DEVICE_STACK_NEXT)

ret = enable_usb_device_next();

#else

ret = usb_enable(NULL);

#endif

if (ret != 0) {

printk("Failed to enable USB");

return 0;

}

printk("Bluetooth over USB sample\n");

return 0;

}

Next, I made some changes to the CMakeLists.txt file：

target_include_directories(app PRIVATE $ENV{ZEPHYR_BASE}/subsys/bluetooth/controller/include)

target_link_libraries(subsys__bluetooth)

Those are all the changes I made to the configuration files and source code. Next, I performed the 'west build' and 'west flash' operations, both of which did not report any errors. After flashing, I connected the development board to the computer via a USB data cable. Then, I ran 'hciconfig -a', and that's when I encountered the 'can read local name' error I mentioned earlier.

And lastly the nRF Connect SDK version is 8.32. thank you again.

p.s.Bluetooth drivers by using BlueZ in a Linux environment.

RE: nrf52840, trying to use hci_usb application

Einar Thorsrud — Thu, 02 Nov 2023 07:41:43 GMT

Can you show me step by step what you are doing? Starting with any changes you make and how you configure the firmware on the nrf (though I strongly suggest reverting y our changes even though they don't seem problematic to try to isolate the issue).

Then how you connect to the computer, and every single command on the command line including the response you get back. This way I will be able to understand what you are doing and try to reproduce on my end.

Lastly, which nRF Connect SDK version are you using?

RE: nrf52840, trying to use hci_usb application

maybe — Thu, 02 Nov 2023 01:15:22 GMT

hi, here is some additional information, i am using Linux Ubuntu，
Distributor ID: Ubuntu
Description: Ubuntu 22.04.3 LTS.

RE: nrf52840, trying to use hci_usb application

maybe — Wed, 01 Nov 2023 14:27:16 GMT

Sure! But I'm already off work and at home right now, so I can only provide a rough summary of the information. I can give you more detailed information tomorrow. First, in the main.c file of hci_usb, I defined an arbitrary MAC address for Bluetooth. After burning the program and connecting it to the computer, I entered 'hciconfig -a' in the terminal. I saw 'hci0' displaying the MAC address I defined, but the Bluetooth status may show as 'DOWN.' To bring up the Bluetooth device, I used the command 'hciconfig hci0 up.' All the related 'hciconfig' operations resulted in an error message saying "can't read local name." After that, when I used the 'hciscan' command, it displayed "scanning," but then reported an error: "Inquiry failed not supported."

RE: nrf52840, trying to use hci_usb application

Einar Thorsrud — Wed, 01 Nov 2023 14:15:22 GMT

That is good to know. Can you share the full command sequence you use on your computer to set up Bluetooth with the nRF as controller? (along the lines explained in the documentation here)? Which Linux distro and version are you using? Any other information that could be relevant?

RE: nrf52840, trying to use hci_usb application

maybe — Wed, 01 Nov 2023 14:02:48 GMT

hi! thanks for the reply, and the answer is no. if i do not call to ll_addr_set(), only flash the hci_usb application on board, it will also get the error: can't read local name.

RE: nrf52840, trying to use hci_usb application

Einar Thorsrud — Wed, 01 Nov 2023 13:58:07 GMT

Hi,

Is it so that you only get this error ("Can't read local name on hci0: I/O error (5)") when you include the code the call to ll_addr_set() on the nRF side?