correct shutdown procedure

[richbass]

Is it ok to shutdown my rpi using the ‘shutdown’ command while QLC+ is running, or is it important to press the exit icon in the main toolbar first?

(obviously unsaved changes will be lost)

[mcallegari]

Debian/Raspbian includes systemd, so when you invoke 'shutdown' or 'halt', systemd will nicely stop all the running services in the proper order. QLC+ is one of them.
You can shutdown/reboot from the web interface too. No need to ssh or access the UI every time.

[richbass]

Thanks Massimo

I have wired up a button that invokes shutdown, so it’s very simple to shutdown the pi with one button push, but wanted to make sure I wasn’t going to corrupt any files

[cannopa]

Hi,

I'm trying to set up an unattended lightig display, running on the Raspberry Pi, which I need to switch on and off at set times. I was planning to just use a time switch for the power for the Pi. Starting the display at power on is fine but if I just kill the power to the Pi then the fixtures remain on, following the last command they received.

I'd thought from this thread that if I schedule a shutdown, before killing power, QLC+ would stop the function and turn off the lights but this isn't the case.

I'd thought one solution could be to run a CRON job to kill the current QLC+ and then start another QLC+ Workspace with all fixtures off, but I can't figure out how to access that second workspace from a command line.

I wondered if anyone could suggest ideas as to how I can schedule a graceful shutdown to QLC+ and the running function?

Hope I'm not highjacking this thread, I think it's close enough to the original question but apologies if it should be a new topic.

(P.S. I'm a Linux novice and QLC+ newbie!)
(P.P.S. - I'v no means to just kill the power to the fixtures)

[richbass]

What dmx interface do you use?
When I shutdown my pi the lights go out (using an enttec usb dmx pro interface, and a homemade interface using the pi uart port).
Maybe your interface retains last state of it loses power(?)

[GGGss]

This behaviour is an option inside the fixtures itself also... (mostly you can choose between: refrain previous data, go black, go to automated mode, ...)

[cannopa]

o you use?

The DMX interface is a Xinfly http://amzn.eu/d/5X5nQY6 . It wasn't very expensive so I guess I might just get what I pay for! But you've got me thinking, if I keep the powered hub up supporting the DMX interface and just power down the Pi - that might make a difference. I'll test that tomorrow when I'm there.

[cannopa]

This behaviour is an option inside the fixtures itself also... (mostly you can choose between: refrain previous data, go black, go to automated mode, ...)

I have Chauvet Tour fixtures which do have this option, but I also have MTC PAR64 and PAR144 fixtures which unfortunately don't (according to the data sheet I have).

[cannopa]

But you've got me thinking, if I keep the powered hub up supporting the DMX interface and just power down the Pi - that might make a difference.

Nope, this doens't work, I tried keeping power on the DMX adapter when the Pi powers off and still the fixtures remain at their last command with the adapter I have.
So, the only solution I can see is to schedule, via CRON, to launch a QLC file, not the default one, but one which will just reset all the fixture to black.
I'm using Massimo's excellently crafted image for the Pi but I'm not sure I can actually access workspaces, that I've downloaded via the web interface, to use on the CRON command. Any assistance here would be appreciated (or other solutions!).

[Stringfamily]

cannopa,

I used the script function in QLC+ to create a shutdown function:
systemcommand:/sbin/shutdown

Then I created a Scene that turns off all fixtures.

Then I created a chaser and added 1. The scene to turn off fixtures and 2. The shutdown function.

Works beautifully!

[dgallo]

it's not requisite to create a function and a chaser, the script can induce a blackout before the shutdown :

blackout:on
wait:2s
systemcommand:/sbin/shutdown arg:

Daniel

[markzvo]

?

are you asking?

or telling?