Switch on computer with RS232 - AVS Forum

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Tweaks and Do-It-Yourself

bdman32
03:08 AM Liked: 0
post #1 of 8
06-16-2014 | Posts: 2
Joined: Jun 2014
Hey guys,
I'm new here, so if I am in the wrong place, let me know.

Is their a way to switch on a home theater PC with an rs232 command. I have a calypso cb-1000 as a controller and a Acer Travelmate 6460, which is great, but I would like the controller to turn the machine on. I am easy to do DIY.

Any suggeststions are welcome

Thank you in advance, BDMAN32
rayzak
02:08 PM Liked: 0
post #2 of 8
06-16-2014 | Posts: 7
Joined: Jun 2014
Although I never done it, I am assuming that would be relatively easy to write using C# or Java implementing one of the PELCO protocols...
I might be wrong, but protocol is there; you just need to send a recognizable set or bits using an interface. Does not sound complicated
jautor's Avatar jautor
04:36 PM Liked: 417
post #3 of 8
06-16-2014 | Posts: 8,497
Joined: Jun 2001
Except that any PC / Laptop in any "standby" mode will not respond to an RS232 command. The only port active would be the Ethernet NIC, which you could use to bring the unit out of standby using the Wake-on-LAN "magic packet". I believe folks have done that using iRule even...

Using an external AC power switch will only work if the computer supports a 'Power Restore State' so that the machine will power on (not remain in standby) when AC power is applied.
EricN's Avatar EricN
11:32 PM Liked: 211
post #4 of 8
06-29-2014 | Posts: 1,265
Joined: May 2002
Quote:
Originally Posted by jautor View Post
Except that any PC / Laptop in any "standby" mode will not respond to an RS232 command. The only port active would be the Ethernet NIC, which you could use to bring the unit out of standby using the Wake-on-LAN "magic packet".
It's called Wake-on-Ring. Using a COM port to wake a pc has been around for a long time and you can still find motherboards that support it. Putting 5v on pin 9 (Ring Indicator) is all it takes.
jautor's Avatar jautor
12:02 AM Liked: 417
post #5 of 8
06-30-2014 | Posts: 8,497
Joined: Jun 2001
Quote:
Originally Posted by EricN View Post
It's called Wake-on-Ring. Using a COM port to wake a pc has been around for a long time and you can still find motherboards that support it. Putting 5v on pin 9 (Ring Indicator) is all it takes.
I suspect any motherboard suitable for use as a HTPC probably lacks actual serial (COM) ports, so you'd be looking for USB support through an RS232 adapter, and I'd be surprised if there was support for it through all that... But if one exists, that certainly would be an easy path.
EricN's Avatar EricN
08:19 AM Liked: 211
post #6 of 8
06-30-2014 | Posts: 1,265
Joined: May 2002
Quote:
Originally Posted by jautor View Post
I suspect any motherboard suitable for use as a HTPC probably lacks actual serial (COM) ports
Many motherboards still have an internal COM header. You make them external with one of these:

http://www.amazon.com/StarTech-com-S.../dp/B001Y1F0HW
bdman32
04:54 PM Liked: 0
post #7 of 8
07-01-2014 | Posts: 2
Joined: Jun 2014
The machine does have an internal COM Port, so that is fiine, the OS is ubuntu so i am not sure how that would go down
And it is an Acer Travelmate 6460 Laptop
jautor's Avatar jautor
02:19 PM Liked: 417
post #8 of 8
07-05-2014 | Posts: 8,497
Joined: Jun 2001
Quote:
Originally Posted by EricN View Post
Many motherboards still have an internal COM header. You make them external with one of these:

http://www.amazon.com/StarTech-com-S.../dp/B001Y1F0HW
D'oh! It didn't even occur to me that the headers would still exist and be populated... That would be a good solution!
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