Re: [Bluez-users] Concurrent access

[Marcel Holtmann <marcel@holtmann.org>]

Hi Thomas,

> We have several devices (robots) that we want to access at the same  
> time from several processes via bluetooth (rfcomm virtual serial  
> port). Each process first opens a connection to one robot (/dev/ 
> rfcommNN), then communicates with the robot for a while and finally  
> disconnects.
> 
> When I launch several processes (about 3-5) at the same time, usually  
> only one of them succeeds to connect. If I constantly try to open the  
> devices (in a loop, wait a second and call "open" again), a couple of  
> them are connected after a while, but not all. Is there a way to make  
> that work? Does anyone else have experience with concurrent access to  
> the bluetooth libs?

the baseband of a Bluetooth chip is only capable of paging one device at
a time. We already had this discussion. You should better look at the
mailing list archive.

Regards

Marcel




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