[mythtv-users] Frontend USB to TV RS232 serial?

[Dave Richardson]

> On Monday 03 August 2009 18:20:56 Paul Bender wrote:
>> Brian Wood wrote:
>> > On Monday 03 August 2009 17:40:32 Paul Bender wrote:
>> >> mythtv at derdev.com wrote:
>> >>> On a frontend without any available serial ports (RS232) and plenty
>> of
>> >>> available USB ports, is there an easy/obvious solution to connect
>> the
>> >>> frontend to an HDTV's RS232 serial port for power on/off control?
>> >>>
>> >>> I see lots of USB to Serial converters but they don't seem to
>> terminate
>> >>> in the male serial connection needed to link up to the TV...
>> Barking
>> >>> up the wrong tree here?
>> >>
>> >> I connect to my Sharp Aquos HDTV using a USB-to-RS232 cable along
>> with
>> >> an RS232 null modem (aka gender-bender) connector/cable.
>> >
>> > There seems to be some confusion about the difference between a null
>> > modem and a "gender bender".
>>
>> Thank you for the clarification. As I have never used a null-modem that
>> was not a gender-bender and I have never used a gender-bender that was
>> not a null-modem, I had always assumed that they were the same thing.
>
> A true gender-bender has a one-to-one mapping of the pins, a null modem
> swaps
> pins 2 and 3 (at least) to change DTE to DCE.
>
> A lot of null modems swap gender, but most gender changers are not null
> modems, you must have run into minority benders.
>
> --
> Brian Wood
> beww at beww.org

We're on the verge of taking this conversation where it shouldn't go... ;-)
Thanks again!