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Re: Serial I/O (Ham Radio)



On Mon, 2005-09-12 at 08:26 -0700, Brian D. McGrew wrote:
> Good morning, here's an interesting question for anyone how does packet
> radio on Fedora or anyone who just has a good understanding of serial
> communications (I used to think I did).
> 
> I've got this Kamtronics KPC-3 TNC (terminal node controller) which is
> essentially a 9600 baud modem that connects a ham radio to a computer.
> 
> Using FC4 I can use either minicom or seyon to talk to the serial port
> and it works, once.  I set the port to be /dev/tty0 9600-8N1 and the
> first time I start up I'm good.
> 
> The problem is that once I quit I can't get restarted.  It requires a
> recycle of the TNC and a reboot of the computer.
> 
> Anyone have any ideas?
> 
> TIA,
> 
> -brian
> K6ICY
>  
> Brian D. McGrew { brian visionpro com || brian doubledimension com }
> ---
> > Those of you who think you know it all,
>   really annoy those of us who do!
> 

Brian,

Could it be incompatible modem init or hangup strings?  

Is the computer reboot really required, cycling the TNC alone does not
solve the problem.  If so, verify that you have the handshaking correct.

Also check dmesg once the serial port hangs up.  Maybe something is
logging a message.

Bob...


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