[mythtv-users] Directv with usb 2 serial adapters

[Tim Litwiller]

no, the mythtv box has no hardware serial ports so I need usb2serial on both
ends of the nul modem cable.



On 7/23/07, John Pierce <john.j35 at gmail.com> wrote:
>
> On 7/21/07, Tim Litwiller <timlitw at gmail.com> wrote:
> > I need help from someone who has done this before.
> >
> > This might be more a linux question than mythtv question but it relates
> to
> > my mythtv setup
> >
> > I am running fedora core 6
> > with 2 directv D12-300 STB's
> >
> > I followed the wiki and got usb to serial adapter cord and nul modem
> cables
> > that are the same chip as the recommended and I don't get the
> /dev/ttyUSB*
> > device when I plug them in.
> >
> > So I enabled the 1 serial port on the mother board - and tried that, but
> I
> > am guessing that I need to specify somewhere the speed to communicate
> thru
> > the port.
> >
> > Is anyone here willing to  step me thru diagnosing why the usb->
> > serial(rs232) ports to initialize correctly? and the see if we can get
> the
> > directv.pl script to make the STB respond?
> >
> >
> Ok, you have the serial null modem cable plugged into the computer and
> then the usb->serial adapter plugged into the null modem cable and
> then the other end of the usb->serial adapter plugged into the stb,
> correct?
>
> Ok, on a suse 10.2 with directv.pl I send the command to /dev/ttyS0
> not the usb device.
>
> After a recent upgrade I had to modify the directv.pl script to set
> the baud rate to 9600 from 115200 that it originally worked with.
>
> #$baudrate = "115200";
> $baudrate = "9600";
> $serport = "/dev/ttyS0";
>
> #
> # Box type, set with box_type command
> #
> $box_type = "D11";
>
> Notice that the baud rate is set to 9600 and the serial port is /dev/ttyS0
>
> When I set mine up it just worked.
>
> Hope this helps!
>
> --
> John
> Registered Linux User 263680, get counted at
> http://counter.li.org
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