[mythtv-users] 2 Backends, 1 backend use the serial port of the other?

Derek Battams derek at battams.ca
Mon Dec 19 09:49:46 EST 2005

Quoting Jason Sharpe <mythtv.list at gmail.com>:

>> Message: 3
>> Date: Mon, 19 Dec 2005 00:30:31 -0600
>> From: Kevin Kuphal < kuphal at dls.net>
>> Subject: Re: [mythtv-users] 2 Backends, 1 backend use the serial port
>>        of the  other?
>> To: Discussion about mythtv <mythtv-users at mythtv.org >
>> Message-ID: <43A65387.4010406 at dls.net>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>> Jason Sharpe wrote:
>> > Hello!
>> >
>> > I am 98% done with my mythtv whole house setup! I have learned alot
>> > and look forward to tweaking this sucker out!
>> >
>> > I have 2 standalone backends, the master has a DCT3200 via firewire
>> > and a HD-3000 (OTA) in it. Both inputs working pretty flawlessly
>> > (knock on wood). I intend to have the master hold all of the
>> > recordings from the 2 BEs (about 1TB in the master so that should be
>> > enough for now)
>> >
>> > I wanted to setup a slave BE to do all the transcoding, Comm flagging,
>> > nuvexport etc so the master BE can focus on recording. I find that 80%
>> > of my recordings take place on nights and weekends  along with 100% of
>> > the viewing at the same time so why not let the slave do the other
>> > tasks while the master is hard at work recording and serving to the
>> > frontends.
>> >
>> > One of the last steps of this entire project is turning off the TiVo
>> > (YAY!) and moving my DishNetwork receiver onto myth. I have read of
>> > the headaches of getting a HD-3000 (using DVB drivers) and a PVR-250
>> > working in the same box so I installed a PVR-250 into the slave BE.
>> >
>> > To start, I am not running LIRC on any frontend or backend for remote
>> > control use. I have PS/2 IR keyboards and learning remotes to make it
>> > easy. (that way I can whip out the IR keyboard and use it to browse
>> > the web/email when I I don't want to fire up my laptop.)
>> >
>> > I have a serial IR blaster from www.irblaster.info
>> > <http://www.irblaster.info> that I need to use to control the
>> > DishNetwork box. My issue is that the slave BE does not have a serial
>> > port on it. However my master BE sits right next to the slave and it
>> > does have a serial port. I have LIRC working on the master and
>> > blasting correctly using /dev/lircd.
>> >
>> > Being a linux newbie I am probly asking a basic question, but with the
>> > PVR-250 in my slave BE is there a way to have my slave BE use the
>> > serial port on my master BE to blast to control the DishNetwork box?

Just a quick thought.  If you really wanted the master to IR blast for 
the slave then you could setup the channel change script for the slave 
to simply be an ssh /telnet call to the master, which then calls the 
actual channel change script.  It's reliability and responsiveness 
could be questioned, but assuming it's a wired ethernet connection 
between the two then I think the call would be reliable.  The only draw 
back is that it might be a few extra seconds to change channels.

Just an idea...

  - Derek

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