bluetooth 2.0 is extremely slow

Mike Cronenworth mike at cchtml.com
Thu Mar 27 01:24:26 UTC 2008


Hi all,

I've lived with slow transfer speeds long enough. Ever since I purchased 
an ASUS Bluetooth 2.0+EDR USB adapter it has always taken *minutes* 
instead of *seconds* to transfer files from my cell phone to my computer 
and vice versa.

Fedora 8, latest updates.
Nokia N95-1, latest firmware.

Both are Bluetooth 2.0+EDR devices.

It took *40 seconds* to transfer a 1 megabyte picture. I timed this with 
'watch -n 1 date' for grins, so I can't give you nanosecond numbers, but 
even a rough estimate shows that transfer speeds are *abysmal* and need 
to be addressed. Ideally it should be taking less than 10 seconds to 
transfer the same image file on a true 2.0+EDR setup. I have two 
different computers with the same Asus adapter. Same speeds.

I saw someone fixed this by forcing larger MTUs. 
http://lists.freebsd.org/pipermail/...ary/000847.html 
<http://lists.freebsd.org/pipermail/freebsd-bluetooth/2007-January/000847.html>

Before modifying the OpenOBEX sources, I posted a message on their 
board, but I haven't heard anything yet. Does anyone have any experience 
with this?

Thanks,
Mike




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