HID over BLE

[Thomas Gagneret]

Hi everyone,

I was wondering why the specification has created a new BLE profile instead of using HID over BLE (and reuse the same protocol defined for USB) ?

My goal is not to change the spec but only to have technical explanation about this choice :)

Thank you

[Philipp Junghannß]

good question especially as that could have made it easier to integrate FIDO with BT devices without needing extra support from the OS (like windows 10 has) after all FIDO2 over USB works also in systems that dont have OS level support if the browser supports it, like with Windows 8 or Linux.

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[Thomas Gagneret]

Hi,

I've done some testing, and it works fine using HID over BLE on Linux and Windows (in a browser) :).

So, like you said, it would have been easier (mostly for Linux which does not support FIDO over BLE for now I think).

[Jay Huang]

Hello Thomas,

I am also working on HID over BLE and would like to discuss some questions I have. I have a working authenicator via USB HID. 

I modified HID BLE GATT table by adding character of input and output report. But when I use webauthn to register, it shows "Unknown device state (code: 1,9, 0x80070057")"

I noticed that the host did not send output report at all, so I think either my webAuthn did not accept BLE over HID, or the descriptor is different from USB?