Re: [Bluez-users] /dev/rfcomm256 ...?

[Marcel Holtmann <marcel@holtmann.org>]

Hi Thomas,

> >> rfcomm devices with a number > 255 (e.g. /dev/rfcomm256) in "/etc/
> >> bluetooth/rfcomm.conf" seem to be ignored by rfcommd. Is this a hard
> >> limit, or does anyone know a simple way to increase this? We
> >> currently have about 400 devices that should go into that file.
> >
> > yes, that is a hard limit. We only have 256 minor device numbers
> > available and that is actually quite a lot. Describe your use case,
> > because creating more than 256 TTY seems not like one of the best ways
> > to go.
> 
> Thanks. We have 400 robots, numbered from 1 to 400 (with a couple of  
> gaps) and equipped with a bluetooth chip (serial port profile). We  
> don't need to communicate with more than 5 at the same time, but  
> these 5 robots can be picked at random from the 400. Hence, we need  
> to be able to establish a connection to all of them at any time.
> 
> Up to now, we only used the first 200 and put all them in /etc/ 
> bluetooth/rfcomm.conf with "bind yes". This worked reasonably well  
> (apart from the problems with concurrent access that I mentioned in  
> another post). Is there a more elegant way?

rewrite your application to use the RFCOMM socket directly. In this case
you don't have this limit at all.

Regards

Marcel




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