Determine TV state

eroj · October 3, 2016 at 11:28 AM

Hi

I'm using Libreelec on a RPi3.
My TV backend (TVHeadend) is running on my HTPC.
Therefore my RPi connetcs to the HTPC to watch TV.
Due the fact that the HTPC is not turned on all the time, I would like to do the following:

When I turn on my Philips TV, which is connected to the RPI, Libreelec should recognize this and turn on the HTPC via WoL.
Scripting this is no problem, but I wasn't able to find a file where I could find the TV connection state.
Something like connected/disconnected or on/off.
Additionally this state should also turn to the opposite when I turn off the TV.

If I could find a file which offers this information. I could run a cronjob for that.

Thanks in advance for help.

**popcornmix** · October 5, 2016 at 1:32 PM

Some TVs will assert hotplug when powered on and deassert it when powered off (but some leave it always asserted).
Run "tvservice -s" (e.g. from ssh) with TV powered and unpowered and check if the number after "state" changes.

If that doesn't work you may be able to monitor events. Run "tvservice -M" and then power off and on. Does it report anything?