Delay during StartUp

HEck · December 29, 2020 at 10:19 AM

Hi Community,

I need a starup-delay of about 30s after power-on of my RasPi4, to wait until other components of my entertainment equipment are ready. I´m quite sure, there is a delay-command available in the OS-layer, but I have right now not an idea about the syntax and how/where I have to insert it.

Thank you for your hints

Henry

elonesna · December 29, 2020 at 12:58 PM

Quote from HEck

I need a starup-delay of about 30s after power-on

Putting a large general system boot delay is never a good alternative, but if this is what you want you can write "sleep 30s" in /storage/.config/autostart.sh

HEck · December 29, 2020 at 4:13 PM

Hi elonesna,

thank you for your suggestion. Yes, it could be, that some other tasks are running into a timeout. But if the delay is on the beginning of the startup, it should not disturb other stuff. I´ll try it.

My alternative solution is a voltage pull down on the HW-reset pin for this 30s after power-on. But I want to avoid this additional HW effort.

Greetings

Henry

**Da Flex** · December 29, 2020 at 4:46 PM Official Post

As I learned recently, the Kodi process starts after autostart.sh execution, so this approach should work for you.

HEck · December 30, 2020 at 9:37 AM

Fine!!

But when I want to enter the autostart.sh, I could not find the ".config" folder in "storage". I`m using the "File Manager" in Kodi "Add a source" Could you please explain me StepByStep how to find the autostart.sh and how to edit this file. Would be very nice!

Greetings

Henry

ghtester · December 30, 2020 at 12:09 PM

Use putty (putty.exe) or another SSH client to connect to your RPi 4 ( the SSH service needs to be enabled in Settings / LibreELEC / Services ), username = root, password = libreelec , then use nano editor to create or edit existing autostart.sh file:

nano /storage/.config/autostart.sh

elonesna · December 30, 2020 at 12:42 PM

Quote from HEck

explain me StepByStep

You need a quick linux course, there are many on the internet, you will have no trouble finding one.

For the moment, type the following commands from an SSH console connected to LE to create your autostart.sh file:

Code

echo "#!/bin/sh" > /storage/.config/autostart.sh
echo "sleep 30s" >> /storage/.config/autostart.sh
chmod +x /storage/.config/autostart.sh
reboot # to test

**chewitt** · December 31, 2020 at 4:56 AM Official Post

Code

echo "sleep 30s" >> /storage/.config/autostart.sh

^ this is wrong, it should be "30" not "30s"

**mglae** · December 31, 2020 at 9:41 AM

Optional suffix is possible:

Code

 # sleep --help
BusyBox v1.31.0 (2020-10-25 23:41:19 UTC) multi-call binary.

Usage: sleep [N]...

Pause for a time equal to the total of the args given, where each arg can
have an optional suffix of (s)econds, (m)inutes, (h)ours, or (d)ays

autoexec.sh does not need to be executable, to create or add the delay just do:

Code

echo "sleep 30" >> /storage/.config/autostart.sh

HEck · December 31, 2020 at 10:39 AM

Dear All,

thank you very much for your kind support. It´s working now.

Greetings and a happy new year

Henry

elonesna · December 31, 2020 at 11:16 AM

Quote from chewitt
Code
echo "sleep 30s" >> /storage/.config/autostart.sh
^ this is wrong, it should be "30" not "30s"

Sorry, I like the simple rules, the scripts naming the shell and as executable files, and the sleep command always with the suffix [s, m, h, d], and always checking that they work because there are too many linux that do not follow the rules.