News:

Rule #1 - Be Patient - Rule #2 - Don't ask when, if you don't contribute - Rule #3 - You have coding skills - LinuxMCE's small brother is available: http://www.agocontrol.com

Main Menu

hdmi cec

Started by domotiqa.com, February 17, 2010, 02:53:57 PM

Previous topic - Next topic

domotiqa.com

here an interresting project:
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1261237176/60

to control device througt hdmi cable !
[url="http://www.domotiqa.com"]http://www.domotiqa.com[/url] - home automation

jimbodude

part of the standard, but the communication isn't standardized:
http://en.wikipedia.org/wiki/HDMI#CEC

domotiqa.com

ok however, if you look in the project some people stores the command that work (on/off...)

Could be cool to use hdmi command instead of IR
[url="http://www.domotiqa.com"]http://www.domotiqa.com[/url] - home automation

jimbodude

Yes, it would be similar to the RS232 interfaces - where every vendor has their own way of doing things.

totallymaxed

Quote from: jimbodude on February 18, 2010, 02:36:01 PM
Yes, it would be similar to the RS232 interfaces - where every vendor has their own way of doing things.

Exactly right. Thats the basic problem CEC... it will end up being a different implementation for each vendors hardware. Therefore another mess :-(

Andrew
Andy Herron,
CHT Ltd

For Dianemo/LinuxMCE consulting advice;
@herron on Twitter, totallymaxed+inquiries@gmail.com via email or PM me here.

Get Dianemo-Rpi2 ARM Licenses [url="http://forum.linuxmce.org/index.php?topic=14026.0"]http://forum.linuxmce.org/index.php?topic=14026.0[/url]

Get RaspSqueeze-CEC or Raspbmc-CEC for Dianemo/LinuxMCE: [url="http://wp.me/P4KgIc-5P"]http://wp.me/P4KgIc-5P[/url]

Facebook: [url="https://www.facebook.com/pages/Dianemo-Home-Automation/226019387454465"]https://www.facebook.com/pages/Dianemo-Home-Automation/226019387454465[/url]

[url="http://www.dianemo.co.uk"]http://www.dianemo.co.uk[/url]

domotiqa.com

yep, however, if you have a look in the link of my previous post, you'll see that:http://www.andrewncarr.com/hdmi/hdmi-cec-codes.xls

A good start !
[url="http://www.domotiqa.com"]http://www.domotiqa.com[/url] - home automation

jimbodude

My point was that CEC doesn't seem to solve any problems that RS232 doesn't solve, except one less cable.

wierdbeard65

Just browsing and stumbles across this one.

My TV does have HDMI, but not RS232, another problem this would solve.....
Paul
If you have the time to help, please see where I have got to at: [url="http://wiki.linuxmce.org/index.php/User:Wierdbeard65"]http://wiki.linuxmce.org/index.php/User:Wierdbeard65[/url]

jimbodude

Quote from: wierdbeard65 on February 22, 2010, 06:22:54 PM
My TV does have HDMI, but not RS232, another problem this would solve.....

Assuming that your TV can handle CEC communications...  As I understand it, most do not support those features yet.

wierdbeard65

Damn!   >:(

As they say, as one door closes another one slams in your face!  :'(
Paul
If you have the time to help, please see where I have got to at: [url="http://wiki.linuxmce.org/index.php/User:Wierdbeard65"]http://wiki.linuxmce.org/index.php/User:Wierdbeard65[/url]

dowster

from what ive heard every device model has its own id code for its hdmi, maybe have a trainer built into lmce and have it tell you what buttons to press so it can capture the codes, then upload them to the wiki or something. im not good at coding yet so im just throwing this out there. scrutinize away  :P

sambuca

Unfortunately, there are very limited (if any) support for accessing CEC through graphics cards. This is a hardware and driver issue, which we have no control over.

When/if that is solved, your suggestion might work. But putting the codes in the wiki is a big NO-NO!! We have a device template system for such things (this is how IR codes are stored today). I suggest you try to understand device templates, as it will make it easier to understand the system

best regards,
sambuca

Marie.O

Regarding HDMI-CEC, as pointed out elsewhere in the forum. There is a USB2HDMI-CEC device available. If anyone is willing to do dev work on integrating it into our system, or sponsor other people to do so, lmce has all the plumbing in place to control devices via HDMI-CEC.
If I helped you, feel free to buy me a coffee: [url="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=2VKASZLTJH7ES"]https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=2VKASZLTJH7ES[/url]

wierdbeard65

Pos,

I've done a quick search of the forum and can't find the thread you refer to. I appreciate it may come to nothing, but I'd like to monitor the thread anyway  ;D CAn you post a link to it please?

Thanks!
Paul
If you have the time to help, please see where I have got to at: [url="http://wiki.linuxmce.org/index.php/User:Wierdbeard65"]http://wiki.linuxmce.org/index.php/User:Wierdbeard65[/url]

Marie.O

If I helped you, feel free to buy me a coffee: [url="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=2VKASZLTJH7ES"]https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=2VKASZLTJH7ES[/url]