How to catch and interpret CEC signal from TV @LibreELEC

JimmySmith · January 8, 2019 at 6:41 PM

Didnt find anything in this thread yet, so I wonder, if following workaround is doable:

Add option to shutdown/startup kodi service (systemctl) to the usual Sleep/Hibernate functions. So it could be assign for example to CEC TV turn on/off actions. Or additionaly also by keypress through lirc/remote?

Not sure if this is possible (especially turn-on) part, ie. if using Lirc/remote.xml (maybe lircd) need kodi service running to process keypress. And the same thing for CEC..

Is this total nonsense, or something, what could be done?

**vpeter** · January 8, 2019 at 7:27 PM

For IR you can use irexec.

For keyboard I was using actkbd to restart kodi when kodi become non-responsive. (Gladly it is not needed anymore for last few months.)

No idea for CEC (only tested few times).

JimmySmith · January 8, 2019 at 8:00 PM

Thanks.. That sounds promising and propably deserves some digging

Triggering events manually (need to use two more buttons, but better than 20% CPU all the time)

Keyboard input

I dont use keyboard anywhere, from the quick google seems that actkbd would must be ported.

IR remoted environments looks easy:

Create /storage/.config/lircrc

Code

begin
prog = irexec
button = KEY_UP
config = systemctl start kodi
end
begin
prog = irexec
button = KEY_DOWN
config = systemctl stop kodi
end

lircrc deamon isnt started in LE automatically, when lircrc is present, so we need to start it via autostart.sh / etc

irexec -d /storage/.config/lircrc

CEC-related inputs:

I think libCEC should handle inputs even when Kodi service is down - otherwise I dont know, how would be possible to wakeup sleep/hibernated device through it. How to catch input and execute command is another thing.. I look on the Input-libCEC settings, but I dont see there CEC related option, how to "wake-up" Kodi box, when TV is turned ON. Correct me please, if I am mistaken.

Next big question is, if this could be

Automated solution

Shutdown Kodi - I can imagine grep kodi.log, to find, if there is inactivity, or use some Addon (1 / 2) to trigger stop action instead screensaver etc.

Startup Kodi - Here is really troublemaker. Only thing I imagine there is CEC environments, so Kodi would be started (ie. script would be called) when connected TV is turned ON. But here I am struggling still. How to catch and interprete CEC command: outside Kodi, but just on Linux LibreELEC level?