[Bluez-users] Limitation of emulator ?

[Bluez-users] Limitation of emulator ?

[Varat Chaikasetsin]

Hello ,
   I'm doing  my final year project about routing in Scatternet.I need to have 
lots of BT devices for this project so I decided to use "hciemu" to simulate 
many BT devices instead of using the real ones.
   Everthing seems to be allright with that emulator but now I'm facing a big 
problem. I can't simulate BT device more than 15 devices (hci0 - hci15).I  
use "hciemu localhost:xx" command to simulated all devices. 
   Moreover, when I've simulated 15 devices then pluged the USB device in ,I 
can't see or use that USB device by using "hciconfig" command.
    What am I doing wrong? what should I do ? or it's a limitation of the 
emulator ?
    Thanks for your help.
Regards,
Varat



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Re: [Bluez-users] Limitation of emulator ?

[Marcel Holtmann]

Hi Varat,

>    I'm doing  my final year project about routing in Scatternet.I need to have 
> lots of BT devices for this project so I decided to use "hciemu" to simulate 
> many BT devices instead of using the real ones.
>    Everthing seems to be allright with that emulator but now I'm facing a big 
> problem. I can't simulate BT device more than 15 devices (hci0 - hci15).I  
> use "hciemu localhost:xx" command to simulated all devices. 
>    Moreover, when I've simulated 15 devices then pluged the USB device in ,I 
> can't see or use that USB device by using "hciconfig" command.
>     What am I doing wrong? what should I do ? or it's a limitation of the 
> emulator ?

the kernel side has no limit of attached devices, but the userspace
tools like hciconfig etc. are limited to maximal 16 devices.

Regards

Marcel




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[Bluez-users] Re: Limitation of emulator ?

[Varat Chaikasetsin]

Hi Marcel

> Hi Varat,
> >    I'm doing  my final year project about routing in Scatternet.I need to 
have 
> > lots of BT devices for this project so I decided to use "hciemu" to 
simulate 
> > many BT devices instead of using the real ones.
> >    Everthing seems to be allright with that emulator but now I'm facing a 
big 
> > problem. I can't simulate BT device more than 15 devices (hci0 - hci15).I  
> > use "hciemu localhost:xx" command to simulated all devices. 
> >    Moreover, when I've simulated 15 devices then pluged the USB device 
in ,I 
> > can't see or use that USB device by using "hciconfig" command.
> >     What am I doing wrong? what should I do ? or it's a limitation of the 
> > emulator ?
> 
> the kernel side has no limit of attached devices, but the userspace
> tools like hciconfig etc. are limited to maximal 16 devices.
> 
> Regards
> 
> Marcel 

     I've tried to change the HCI_MAX_DEV parameter in " bluez-libs-
2.4/include/hci.h " before reinstalling it as your suggestion.After that, I 
intalled these utilities

bluez-utils-2.3
bluez-pan-1.1
bluez-sdp-1.5
bluez-bluefw-1.0
bluez-hcidump-1.5
bluez-hciemu-1.0  

     first time that I changed it's max number to 8 it worked. I can simulate 
only 8 device but later, when I try to change it to other value and reintall 
all of libraries and uitilities the way I did before ,it doesn't work !.
     What am I doing wrong ? or Do I have to install libraries and utilities in 
order ?
 
Regards,
Varat  






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Re: [Bluez-users] Re: Limitation of emulator ?

[Marcel Holtmann]

Hi Varat,

>      I've tried to change the HCI_MAX_DEV parameter in " bluez-libs-
> 2.4/include/hci.h " before reinstalling it as your suggestion.After that, I 
> intalled these utilities
> 
> bluez-utils-2.3
> bluez-pan-1.1
> bluez-sdp-1.5
> bluez-bluefw-1.0
> bluez-hcidump-1.5
> bluez-hciemu-1.0  
> 
>      first time that I changed it's max number to 8 it worked. I can simulate 
> only 8 device but later, when I try to change it to other value and reintall 
> all of libraries and uitilities the way I did before ,it doesn't work !.
>      What am I doing wrong ? or Do I have to install libraries and utilities in 
> order ?

maybe you have to recompile everything. The install order is bluez-libs,
bluez-utils and then the rest.

Regards

Marcel




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