RT-AC66U - Excute script every 10 seconds

[SaSa]

*newbie alert*

I followed a guide for setting up a virtual presence sensor. The scripts, called "CheckIfHome" look for a specific MAC address connected to a router and reports to a smarthouse controller. The scripts it self is working well when I execute it manually trough Putty. The script is in the folder /jffs/scripts.

Link to the thread where I found the script.
(https://community.smartthings.com/t/release-asuswrt-wifi-presence/37802).

However, I need help to make a script that runs "CheckIfHome" automatically every 10 seconds (or more often). From the thread mentioned above; the author of the script "CheckIfHome" made a script called "init-start". This script will execute "CheckIfHome" every 15 seconds. Unfortunately this is not working well for me. Not idea why.

The init-start script looks like this:

#!/bin/sh
cru a CheckIfHome "* * * * * /jffs/scripts/CheckIfHome"
cru a CheckIfHome15 "* * * * * sleep 15; /jffs/scripts/CheckIfHome"
cru a CheckIfHome30 "* * * * * sleep 30; /jffs/scripts/CheckIfHome"
cru a CheckIfHome45 "* * * * * sleep 45; /jffs/scripts/CheckIfHome"

After rebooting the router and I run the command cru l;

admin@RT-AC68U-FCC0:/tmp/home/root# cru l
* * * * * /jffs/scripts/CheckIfHome #CheckIfHome#
* * * * * sleep 15; /jffs/scripts/CheckIfHome #CheckIfHome15#
* * * * * sleep 30; /jffs/scripts/CheckIfHome #CheckIfHome30#
* * * * * sleep 45; /jffs/scripts/CheckIfHome #CheckIfHome45#
sarwar@RT-AC68U-FCC0:/tmp/home/root#

The sleep command works for my router.

The issue is that instead of "CheckIfHome" is executed every 15 seconds, it's executed every 40-50 seconds. No matter how I modify the "init-start"

Most likely I'm doing some basically wrong. Any help would be highly appreciated.

 

[RMerlin]

You are making this way more complicated than it needs to be. Have init-start directly run CheckIfHome, and modify CheckIfHome instead to be a continual loop, with a sleep 15 within that loop.

 

[SaSa]

You are making this way more complicated than it needs to be. Have init-start directly run CheckIfHome, and modify CheckIfHome instead to be a continual loop, with a sleep 15 within that loop.

Thanks for your reply. Any input how this code should be looking like? Cheers

 

[ColinTaylor]

#!/bin/sh

# Do some stuff
 
while sleep 15
do
    # Do some more stuff
done

 

[swetoast]

hehe basic shell scripting