On Thu, May 23, 2002 at 05:19:08PM -0500, Chris Kotrla wrote:
> Hello,
> 
> I'm trying to install the Belkin F5U109 USB-serial adapter in my debian
> install running 2.4.18.  Searching google for help yielded some mails from
> this list, but I didn't find anything conclusive.
> 
> Evidently the belkin module is not the right one to use, but rather the
> mct_u232 is the module that has support for the belkin F5U109.  I install
> it and usbserial, and everything looks good when I plug it in:
> 
> ---
> May 23 16:54:47 cottonmouth kernel: hub.c: USB new device connect on
> bus1/2, assigned device number 3
> May 23 16:54:47 cottonmouth kernel: usbserial.c: Magic Control Technology
> USB-RS232 converter detected
> May 23 16:54:47 cottonmouth kernel: usbserial.c: Magic Control Technology
> USB-RS232 converter now attached to ttyUSB0 (or usb/tts/0 for devfs)
> ---
> 
> Note that it's not actually a Magic Control Technology USB-RS232
> converter; its a Belkin.  I'm guessing Magic Control Tech OEMed the
> product?

Belkin OEMed the product.

> Anyway, the device has three lights on it: LINK, TX, and RX.  The link
> light is always on when it's plugged in.  When I echo 'some stuff' >
> /dev/ttyUSB0, the LINK light blinks, but nothing else happens.  On a
> windows box, when I send stuff, the TX light does blink (as it should).

Does the data go through properly?

> The device I'm trying to control only works at 2400 baud, so I set the
> baudrate: stty 2400 < /dev/ttyUSB0.  The device doesn't show any sign of
> being sent anything, though.

stty doesn't send data, what do you think should be sent?

> Anyone know what I'm doing wrong here?  As far as I can tell, the mct_u232
> should work fine.  I checked the source code and saw a comment indicating
> that it was updated to support the Belkin F5u109.
> 
> Any help would be appreciated!

Have you tried using a serial based program to talk to the device,
instead of just "echo"?  I've found that echo doesn't work very well for
serial devices, but programs like minicom or kermit work just fine.
Have you tried them?

thanks,

greg k-h

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