Hi Luiz,
Am 01.02.23 um 22:37 schrieb Luiz Augusto von Dentz:
Hi Martin,
On Wed, Feb 1, 2023 at 1:25 PM Martin Petzold <martin.petzold@xxxxxxxx> wrote:
Hi,
Linux 5.10, BlueZ 5.55
I have a remote control which implements Bluetooth LE. If I use the
default Bluetooth daemon, I am able to pair and trust using
bluetoothctl. If the connection is lost after a while (or days) and a
button on the remote control is pressed, the daemon re-connects
automatically (because the device is paired). This is basically what I need.
But, I would also like to manually set notifying for characteristics
(Report) on the HID service within my application (Java via d-bus). This
is not possible anymore (also not via bluetoothctl) because the "hog"
(or "input") plugin manages the input device and the related HID
services are now hidden.
I then added "--noplugin=input,hog" to my Bluetooth daemon. Which is
okay, because I don't need this support for Kernel HID. Great, now the
HID services are available (also using bluetoothctl), but the peripheral
does not re-connect automatically any more. I always have to connect
manually first. I also have no signal on the d-bus when I press the
button of the remote control, when it is disconnected.
How can I enable automatic re-connect for devices, when these plugins
are disabled?
The only other way I was thinking of is to leave the "hog" plugin
enabled and use the operating system HID interface. However, my
application runs as non-root which makes it complicated and also I would
like to have direct connection and control to my device.
https://github.com/bluez/bluez/blob/master/doc/gatt-api.txt#L390
Thanks, I have implemented and registered the HID profile using
org.bluez.GattProfile1 and now the device (remote control) re-connects
automatically.
However, when I enable notifying on the Report characteristics of the
HID service after I received the first device properties update (with
services resolved), I miss the first Report event. If I press a button,
the remote re-connects and dbus events for device properties updated are
fine, but I don't have a Report event. If I then press again, I do get a
Report event, because I set notifying on the Report characteristics.
Setting notify seems to be too late.
What is the trick to get also the first button pressed as a Report
characteristic event?
At the moment I only have the HID service
(00001812-0000-1000-8000-00805f9b34fb) in the properties map of the
org.bluez.GattProfile1.
Thanks,
Martin
--
Martin Petzold (Inhaber & Geschäftsführer)
TAVLA Technology GmbH
Im Dau 14
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E-Mail: martin.petzold@xxxxxxxx
