Jay,
It's quite a while since I did this, before jamvm was in the buildroot. I used kaffe, and was able to compile the JNI stuff with this after compiling kaffe for gumstix. But kaffe's performance was very poor.
Nick

On 14/02/06, Jay Petersen <jay@blueshift3.com> wrote:
Craig,
        Basically I'm looking to use a bluetooth api from java.  There are a couple
of different kinds, those that piggy back via javax.comm (I have rxtx working
so that is covered), or tie directly into the BlueZ layer via JNI (the
aventana route).
        I was having trouble reading data to and from the serial port and have had
zero luck as of yet compiling any of the JNI stuff for the gumstix yet.

The Serial Port method:
        I did some digging and notice in the S30Bluetooth init.d script it fires off
hciattach /dev/ttyS3...  However, reading or writting to it gets me no
results.  I have tried rfcomm0, but it doesn't list as a valid serial port
from the rxtx package, and to be honest I'm not sure how to bind the local
bluetooth adapter to a local serial port like that.  I used rfcomm to get
onto the board when I got it yesterday because I am still waiting for ups to
deliver my STUART board ;) hehehe
        I tried creating a symlink between the two and the serial api didn't barf,
but it sat quiet also.

The JNI method:
        I was able to get the avetana BlueZ jni stuff compiled, and scanning on my
desktop box.  I just need to figure out how to get the native stuff compiled
down for the gumstix.

for what it's worth i'm going to post someplace everything I've been doing to
get mine up and running with bt etc...

Thanks,
-Jay

On Tuesday 14 February 2006 12:12, Craig Hughes wrote:
> On Feb 14, 2006, at 7:33 AM, Jay Petersen wrote:
> > haha sorry, that last one was for Ed.
> >
> > Nick,
> >     If you dont mind me asking but how did you get it to communicate
> > with the bt
> > module?  Did it access it via ttyS3?
>
> Jay, not sure I'm understanding what you're trying to do -- you want
> to talk HCI to the bluetooth module from Java, instead of using the
> kernel's HCI translation layer?  Do you have the data sheet for the
> bluetooth module to know what HCI commands it responds to for the
> basic setup stuff (like setting up baud rate, flow control, etc)?  Or
> do you want to use Java to talk over a bluetooth serial port to a
> remote device, in which case you should be having Java open /dev/
> rfcomm0 instead of /dev/ttyS3
>
> C
>
>
>
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