peripheral_hids_keyboard only works with some hosts

RE: peripheral_hids_keyboard only works with some hosts

isimon — Thu, 07 Mar 2024 20:56:36 GMT

mlac many thanks, good luck with your projects.

RE: peripheral_hids_keyboard only works with some hosts

mlac — Thu, 07 Mar 2024 20:20:12 GMT

You have to learn Zephyr fundamentals, like Kconfig, which is needed for this. I've also worked my way through the Zephyr / nRF SDK / Bluetooth documentation over the course of months. I'm sorry, but I'm too busy nowadays.

RE: peripheral_hids_keyboard only works with some hosts

isimon — Thu, 07 Mar 2024 18:33:44 GMT

mlac sorry for bothering you but I'm really new to this environment...trying to implement Hung answer I look for CONFIG_NFC_OOB_PAIRING in the example but I don't see where is it defined

Could you please help me or else sending me the code you have working properly?

Many thanks in advance

RE: peripheral_hids_keyboard only works with some hosts

mlac — Thu, 07 Mar 2024 17:26:00 GMT

It works on Android. I don't have an iPhone.

RE: peripheral_hids_keyboard only works with some hosts

isimon — Thu, 07 Mar 2024 17:23:02 GMT

Thanks mlac , will try the suggestion and will report it back. Does it work for you even on Android and iPhone?

RE: peripheral_hids_keyboard only works with some hosts

mlac — Thu, 07 Mar 2024 16:04:22 GMT

You pasted the URL incorrectly and should have left a space between the URL and the closing ")", resulting in the correct HIDS keyboard recognized but not character sent address. Now I can see your post after removing the closing ")" character from the end of the URL.

Now that I read your problem, I'm sorry to say I didn't encounter it. The keyboard sample worked well for me, even on my Mac. I had a problem with the mouse sample, but after enabling the encryption as suggested, it worked on my Mac, too.

RE: peripheral_hids_keyboard only works with some hosts

isimon — Thu, 07 Mar 2024 15:26:09 GMT

by the way the page I mention does exist

RE: peripheral_hids_keyboard only works with some hosts

isimon — Thu, 07 Mar 2024 15:10:35 GMT

can you please send me the link of Hung answer?

RE: peripheral_hids_keyboard only works with some hosts

mlac — Thu, 07 Mar 2024 14:49:04 GMT

isimon: The page you linked no longer exists, and the question I asked has been answered by Hung, so I don't understand what you mean by "the lack of response".

RE: peripheral_hids_keyboard only works with some hosts

isimon — Thu, 07 Mar 2024 13:56:39 GMT

I wonder if any Nordic stuff reads this tickets...is very difficult to understand the lack of response

RE: peripheral_hids_keyboard only works with some hosts

isimon — Wed, 28 Feb 2024 15:29:23 GMT

Hi Hung/Mlac, I have been following this post because I want to use the HID keyboard routine and I would like to hear from you what to do next...

I don't know what to do next, will there be a new HID keyboard example or what?

Many thanks in advance , Regards

RE: peripheral_hids_keyboard only works with some hosts

Hung Bui — Wed, 28 Feb 2024 13:31:28 GMT

Hi Mlac,

I think the example followed the requirement of the SIG profile. The keyboard profile has encryption requirement (obviously as you don't want what you type to be transmitted openly) when the mouse profile requirement are more relax as the movement of the mouse, even when tracked doesn't expose too much risk.

I would assume it's only on MAC that encryption is required.

RE: peripheral_hids_keyboard only works with some hosts

mlac — Wed, 28 Feb 2024 13:00:43 GMT

Sorry, I was wrong about CONFIG_BT_HIDS_DEFAULT_PERM_RW_ENCRYPT; It's not enabled by default, indeed. The sample works on my Mac when this option is enabled.

Will you add CONFIG_BT_HIDS_DEFAULT_PERM_RW_ENCRYPT=y to the prj.conf of this sample so that others won't encounter this issue?

RE: peripheral_hids_keyboard only works with some hosts

Hung Bui — Wed, 28 Feb 2024 08:42:51 GMT

Hi mlac,

Could you clarify how you find CONFIG_BT_HIDS_DEFAULT_PERM_RW_ENCRYPT enabled by default ?
Please check the code: https://github.com/nrfconnect/sdk-nrf/blob/v2.5.1/samples/bluetooth/peripheral_hids_mouse/prj.conf

As you can find in the trace you provided, the link with the Macbook was not encrypted.

RE: peripheral_hids_keyboard only works with some hosts

mlac — Tue, 27 Feb 2024 16:12:50 GMT

Hi Hung,

The CONFIG_BT_HIDS_DEFAULT_PERM_RW_ENCRYPT option is enabled by default in the prj.conf of the peripheral_hids_mouse peripheral_hids_mouse sample, so I don't understand what has changed.

You wrote earlier that you could also reproduce this issue. I assume you haven't changed the CONFIG_BT_HIDS_DEFAULT_PERM_RW_ENCRYPT=y option either when testing the peripheral_hids_mouse sample.

RE: peripheral_hids_keyboard only works with some hosts

Hung Bui — Tue, 27 Feb 2024 13:36:44 GMT

Hi mlac,
Could you try testing the peripheral_hids_mouse again , this time with

CONFIG_BT_HIDS_DEFAULT_PERM_RW_ENCRYPT=y

It seems to work for me.

RE: peripheral_hids_keyboard only works with some hosts

mlac — Thu, 15 Feb 2024 15:36:18 GMT

Thanks for confirming this bug, Hung. I will work on other parts of my project until this gets fixed.

I keep this conversation unresolved until the issue gets fixed.

RE: peripheral_hids_keyboard only works with some hosts

Hung Bui — Thu, 15 Feb 2024 15:28:18 GMT

Hi Mlac,
I'm not so familiar with MAC device, but I did a test on a Macbook Air here and saw the same issue.
Doesn't seem pairing is occurring. I will need to check internally here to see why.
My suggestion in the mean time is to take a look at the nRF Desktop and check why it works with nRF Desktop but not the BLE mouse sample.

RE: peripheral_hids_keyboard only works with some hosts

mlac — Thu, 15 Feb 2024 14:33:56 GMT

Thanks for explaining what `nrfjprog --recover` does, Hung. It makes sense.

The nrf_desktop sample did work. I can connect it to my Mac, and the mouse pointer moves when pressing the buttons.

The peripheral_hids_mouse sample still doesn't work, even if I run `nrfjprog --recover` before flashing it, and my Mac doesn't remember any pairing information from before because when it does, it always offers to forget it for the device.

Would you be able to test peripheral_hids_mouse on a Mac? I use a MacBook Air M1, 2020 running macOS Ventura 13.6.3, but any new Mac with an M chip should work.

RE: peripheral_hids_keyboard only works with some hosts

Hung Bui — Thu, 15 Feb 2024 10:28:50 GMT

Hi mlac,

When you do "nrfjprog --recover" the whole flash memory of the chip will be erased. If you simply erase and flash the new code without a full erase, the settings partition will retain, meaning all the bond in your test will still be in the flash. It could be the reason why you can't pair the MAC device because it exceed the maximum of pair information in the setting partition.

From what I can see in the sniffer trace, the mouse did send the notification to the MAC. So there must be an issue interpreting the data on MAC that doesn't result in the mouse movement.

One thing I noticed is that there were no pairing/bonding with the mouse. Could you check why ? It could be reason the MAC doesn't show mouse movement.
I assume the mouse works fine on other machine, correct ?

Could you try using the nRF Desktop application ? It can also emulate a desktop mouse on a DK.
https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/applications/nrf_desktop/README.html#

RE: peripheral_hids_keyboard only works with some hosts

mlac — Wed, 14 Feb 2024 16:03:24 GMT

Hi Hung,

I remembered that in a similarly strange but different situation when I upgraded my application to MCUboot, and it kept crashing shortly after boot, I used the `nrfjprog --recover` command successfully, and I tried it again for this issue, and it solved the problem for the keyboard sample.

How did `nrfjprog --recover` fix the issue? I'm starting to get dependent on this command without understanding what's happening in the background.

As for the mouse, now it pairs, but when I press the buttons, the mouse pointer doesn't move on the Mac, so I'm attaching the updated log and capture:

devzone.nordicsemi.com/.../mouse_2D00_mac_2D00_2.pcapng

devzone.nordicsemi.com/.../mouse_2D00_mac_2D00_2.txt

RE: peripheral_hids_keyboard only works with some hosts

Hung Bui — Wed, 14 Feb 2024 15:31:00 GMT

Hi Mlac,

Regarding the trace between mouse and MAC, it doesn't seem they do pairing. Could you please test again and make sure the sniffer follows the mouse ?
The log say "Unable to get keys for", it either returned by bt_keys_get_addr() or bt_keys_get_type(). In both case it's related to that an old key can not be retracted or it can not create a new slot for the key.
Have you made sure you erased the whole flash before testing ? I am under the impression that it reached the maximum number of device can be paired.

Another option is to enable CONFIG_BT_KEYS_OVERWRITE_OLDEST so that it will overwrite the old key.

If that doesn't help, could you add a breakpoint in the code where "Unable to get keys" is printed out in smp.c (there are 10 locations). We need to know which exact function causing the issue.

RE: peripheral_hids_keyboard only works with some hosts

mlac — Wed, 14 Feb 2024 14:14:46 GMT

Hi Hung,

I haven't had CONFIG_NFC_OOB_PAIRING enabled, and I've enabled CONFIG_BT_SMP_LOG_LEVEL_DBG for the following tests as requested:

devzone.nordicsemi.com/.../keyboard_2D00_mac.pcapng

devzone.nordicsemi.com/.../keyboard_2D00_mac.txt

devzone.nordicsemi.com/.../keyboard_2D00_phone.pcapng

devzone.nordicsemi.com/.../keyboard_2D00_phone.txt

devzone.nordicsemi.com/.../mouse_2D00_mac.pcapng

devzone.nordicsemi.com/.../mouse_2D00_mac.txt

devzone.nordicsemi.com/.../mouse_2D00_phone.pcapng

devzone.nordicsemi.com/.../mouse_2D00_phone.txt

The phone connection attempts were successful, and the Mac connection attempts were unsuccessful.

RE: peripheral_hids_keyboard only works with some hosts

Hung Bui — Wed, 14 Feb 2024 11:36:15 GMT

Hi again,
Please also add CONFIG_BT_SMP_LOG_LEVEL_DBG=y to the code and send us the log if it actually show any extra information on why it reject the pairing request.

RE: peripheral_hids_keyboard only works with some hosts

Hung Bui — Wed, 14 Feb 2024 10:21:04 GMT

Hi Mlac,

Thanks for the trace. I can see that the nRF52840 rejected the pairing with "Unspecific reason".

I'm checking internally to see why this happens.
I assume you were testing with unmodified peripheral_hids_keyboard sample ? ( with CONFIG_NFC_OOB_PAIRING=n ?)
Could you send us the trace when it can connect and pair with other device not the MAC so we can compare ?

Could you try testing with the peripheral_hids_mouse and check if you have the same problem (and give us the trace)