Re: Raspberry Pi

This is not a specification issue, but an implementation and maintenance
cost issue.

The Chromium implementation does not officially support Linux.  ChromeOS is
a controlled distribution where bluez versioning and patches are maintained
and is officially supported.

https://github.com/WebBluetoothCG/web-bluetooth/blob/master/implementation-status.md
notes "Linux is partially implemented and not supported. The
chrome://flags/#enable-experimental-web-platform-features flag must be
enabled."  Ensuring that bluez is up to date may allow it to just work for
you, though at times there are patches to bluez needed.

If Raspberry Pi developers wished to improve support for Chromium
on Raspberry Pi the chromium.org discussion groups would be a good place to
discuss.

On Tue, Sep 8, 2020 at 4:38 PM Großkurth, Dominik <
dominik.grosskurth@ies.tu-darmstadt.de> wrote:

> Hello,
>
> I’m electrical engineer at a university and use web-bluetooth since 3 or 4
> months. It is a great way to communicate with our sensors and overall, I’m
> very happy, thank you very much.
> Today I tried my page with a Raspberry Pi (Hardware Version 4, fresh
> installed, fully updated/upgraded, Chromium Browser) and I was able to
> search for devices but I was not able to get any information from the
> services. Also the
> https://googlechrome.github.io/samples/web-bluetooth/device-information-characteristics.html
> example can’t read the device information services. Is the Raspberry Pi
> simply not supported? Should I open an issue on github?
>
> The behavior with your App (BLE Peripheral Simulator) on a working windows
> 10 Chrome Version 85.0.4183.83
>
> Requesting any Bluetooth Device...
> Connecting to GATT Server...
> Getting Device Information Service...
> Argh! NotFoundError: No Services matching UUID
> 0000180a-0000-1000-8000-00805f9b34fb found in Device.
>
> OK the service is not available but the connection is still OK and my page
> works fine on the machine.
>
> The behavior with your App (BLE Peripheral Simulator) on a Raspberry Pi 4
> Chromium-Browser Version 78.0.3904.108 (Official Build) Built on Raspbian
>
> Requesting any Bluetooth Device...
> Connecting to GATT Server...
> Getting Device Information Service...
> Argh! NetworkError: GATT Server is disconnected. Cannot retrieve services.
> (Re)connect first with `device.gatt.connect`.
>
> The behavior with your App (BLE Peripheral Simulator) on a Raspberry Pi 4
> Chromium Version 83.0.4103.116 (Developer Build) built on Debian 10.2
>
> Requesting any Bluetooth Device...
> Connecting to GATT Server...
> Getting Device Information Service...
> Argh! NetworkError: GATT Server is disconnected. Cannot retrieve services.
> (Re)connect first with `device.gatt.connect`.
>
>
>
>
>
> Best regards,
>
> *Dominik Großkurth, M.Sc. *
>