[Bluez-users] Keyboard woe

[Bluez-users] Keyboard woe

[John Morton]

I've just picked up a luggable bluetooth keyboard for use with a cellphone, 
but I'd like to get it going under linux. This is proving to be a challenge.

So far the USB bluetooth dongle seems to work fine, and I can gather 
information about the keyboard, ie:

> hcitool inq
Inquiring ...
        00:0A:3A:30:D4:40       clock offset: 0x60be    class: 0x001f00
> hcitool info 00:0A:3A:30:D4:40
Requesting information ...
        BD Address:  00:0A:3A:30:D4:40
        Device Name: KEYBOARD
        LMP Version: 1.1 (0x1) LMP Subversion: 0x2c2
        Manufacturer: Cambridge Silicon Radio (10)
        Features: 0xbc 0x06 0x07 0x00 0x00 0x00 0x00 0x00
                <encryption> <slot offset> <timing accuracy> <role switch>
                <sniff mode> <RSSI> <channel quality> <CVSD> <paging scheme>
                <power control>

After some reading I discover that I need to get going hidd to use the 
keyboard and I'd need to connect manually first to perform pairing. (This I 
find in the Debian readme, but no where else - is there documentation I'm 
missing?)

The first time I run hidd --connect 00:0A:3A:30:D4:40 it fails with an oblique 
error message about not being able to open an input device. I have to run 
strace to find out which (/dev/input/uinput) then grep the kernel source to 
work out which module needs building (CONFIG_INPUT_UNINPUT).  Again - have I 
missed some vital piece of documentation, here, because googling was rather 
unreliable...

Now, when I run it, I get a connection, but I'm a bit lost as to what ought to 
happen. What I'm getting is every key press on the bluetooth keyboard 
producing an unknown event code, ie:

> hidd --connect 00:0A:3A:30:D4:40
Connected to 00:0A:3A:30:D4:40 on channel 1
Press CTRL-C for hangup
Unknown event code 1
Unknown event code 64
Unknown event code 2
Unknown event code 3
Unknown event code 4

(String was 1234)

What _should_ be happening?

And what can I do to produce some debugging output of use to any developers on 
the list?

TIA,
John


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Re: [Bluez-users] Keyboard woe

[Marcel Holtmann]

Hi John,

> I've just picked up a luggable bluetooth keyboard for use with a cellphone, 
> but I'd like to get it going under linux. This is proving to be a challenge.
> 
> So far the USB bluetooth dongle seems to work fine, and I can gather 
> information about the keyboard, ie:
> 
> > hcitool inq
> Inquiring ...
>         00:0A:3A:30:D4:40       clock offset: 0x60be    class: 0x001f00
> > hcitool info 00:0A:3A:30:D4:40
> Requesting information ...
>         BD Address:  00:0A:3A:30:D4:40
>         Device Name: KEYBOARD
>         LMP Version: 1.1 (0x1) LMP Subversion: 0x2c2
>         Manufacturer: Cambridge Silicon Radio (10)
>         Features: 0xbc 0x06 0x07 0x00 0x00 0x00 0x00 0x00
>                 <encryption> <slot offset> <timing accuracy> <role switch>
>                 <sniff mode> <RSSI> <channel quality> <CVSD> <paging scheme>
>                 <power control>
> 
> After some reading I discover that I need to get going hidd to use the 
> keyboard and I'd need to connect manually first to perform pairing. (This I 
> find in the Debian readme, but no where else - is there documentation I'm 
> missing?)
> 
> The first time I run hidd --connect 00:0A:3A:30:D4:40 it fails with an oblique 
> error message about not being able to open an input device. I have to run 
> strace to find out which (/dev/input/uinput) then grep the kernel source to 
> work out which module needs building (CONFIG_INPUT_UNINPUT).  Again - have I 
> missed some vital piece of documentation, here, because googling was rather 
> unreliable...
> 
> Now, when I run it, I get a connection, but I'm a bit lost as to what ought to 
> happen. What I'm getting is every key press on the bluetooth keyboard 
> producing an unknown event code, ie:
> 
> > hidd --connect 00:0A:3A:30:D4:40
> Connected to 00:0A:3A:30:D4:40 on channel 1
> Press CTRL-C for hangup
> Unknown event code 1
> Unknown event code 64
> Unknown event code 2
> Unknown event code 3
> Unknown event code 4
> 
> (String was 1234)
> 
> What _should_ be happening?
> 
> And what can I do to produce some debugging output of use to any developers on 
> the list?

please get us the SDP records for this device. Use sdptool with "browse"
or "records" commands to fetch them. You might have a non-HID device
that needs special support in hidd.

Regards

Marcel



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Re: [Bluez-users] Keyboard woe

[John Morton]

On Friday 18 August 2006 06:24, Marcel Holtmann wrote:
>
>  > Inquiring ...
>  >         00:0A:3A:30:D4:40       clock offset: 0x60be    class: 0x001f00
>  >
>  > > hcitool info 00:0A:3A:30:D4:40
>  >
>  > Requesting information ...
>  >         BD Address:  00:0A:3A:30:D4:40
>  >         Device Name: KEYBOARD
>  >         LMP Version: 1.1 (0x1) LMP Subversion: 0x2c2
>  >         Manufacturer: Cambridge Silicon Radio (10)
>  >         Features: 0xbc 0x06 0x07 0x00 0x00 0x00 0x00 0x00
>  >                 <encryption> <slot offset> <timing accuracy> <role
>  > switch> <sniff mode> <RSSI> <channel quality> <CVSD> <paging scheme>
>  > <power control>

>  please get us the SDP records for this device. Use sdptool with "browse"
>  or "records" commands to fetch them. You might have a non-HID device
>  that needs special support in hidd.

> sdptool records 00:0A:3A:30:D4:40
Service Name: SPP slave
Service RecHandle: 0x10000
Service Class ID List:
  "Serial Port" (0x1101)
Protocol Descriptor List:
  "L2CAP" (0x0100)
  "RFCOMM" (0x0003)
    Channel: 1
Language Base Attr List:
  code_ISO639: 0x656e
  encoding:    0x6a
  base_offset: 0x100

I stumbled on a useful review of the device, under the Freedom brand:

http://www.geekzone.co.nz/content.asp?contentid=5236

So it's definitely a serial rather than HID device. How much of a struggle 
would it be to build drivers for it, given that there is already similar code 
for the EPoX presenter?

John


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Re: [Bluez-users] Keyboard woe

[Marcel Holtmann]

Hi John,

> >  please get us the SDP records for this device. Use sdptool with "browse"
> >  or "records" commands to fetch them. You might have a non-HID device
> >  that needs special support in hidd.
> 
> > sdptool records 00:0A:3A:30:D4:40
> Service Name: SPP slave
> Service RecHandle: 0x10000
> Service Class ID List:
>   "Serial Port" (0x1101)
> Protocol Descriptor List:
>   "L2CAP" (0x0100)
>   "RFCOMM" (0x0003)
>     Channel: 1
> Language Base Attr List:
>   code_ISO639: 0x656e
>   encoding:    0x6a
>   base_offset: 0x100

please redo it with "sdptool records --raw <bdaddr>".

> I stumbled on a useful review of the device, under the Freedom brand:
> 
> http://www.geekzone.co.nz/content.asp?contentid=5236
> 
> So it's definitely a serial rather than HID device. How much of a struggle 
> would it be to build drivers for it, given that there is already similar code 
> for the EPoX presenter?

You need to know what protocol are they using or I need a donation of
such a keyboard to actually hack the protocol.

Regards

Marcel



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Re: [Bluez-users] Keyboard woe

[John Morton]

On Friday 18 August 2006 23:10, Marcel Holtmann wrote:
>  please redo it with "sdptool records --raw <bdaddr>".

> sdptool records --raw 00:0A:3A:30:D4:40
Sequence
        Attribute 0x0000 - ServiceRecordHandle
                UINT32 0x00010000
        Attribute 0x0001 - ServiceClassIDList
                Sequence
                        UUID16 0x1101 - SerialPort
        Attribute 0x0004 - ProtocolDescriptorList
                Sequence
                        Sequence
                                UUID16 0x0100 - L2CAP
                        Sequence
                                UUID16 0x0003 - RFCOMM
                                UINT8 0x01
        Attribute 0x0006 - LanguageBaseAttributeIDList
                Sequence
                        UINT16 0x656e
                        UINT16 0x006a
                        UINT16 0x0100
        Attribute 0x0100
                String SPP slave

>  You need to know what protocol are they using or I need a donation of
>  such a keyboard to actually hack the protocol.

Unfortunately, I bought it because I can't afford anything better at the 
moment, but they can be picked up for less than retail on Trademe (a local 
eBay-a-like trading site), so if my fortunes improve, I'll try and arrange 
it.

Might try contacting the manufacturers as they might prove to be helpful. 
Stranger things have happened...

Thanks,
John


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