Hello together,

I am having a problem with starting a script via CODESYS. My goal is to create a screenshot via a button click or via an input. For doing this I am using the
"Sys Process Execute Command" command (no spaces of course, but it screws up the layout somehow). I altered the CODESYSControl.cfg to

[SysProcess]
Command=AllowAll

and I created a script named takeScreenshot which looks like:

\#!/bin/sh
DISPLAY=:0 scrot -d 1 'screenshot.png'

I made it executable with

sudo chmod +x /usr/bin/takeScreenshot

Finally I tested the script with typing ```

takeScreenshot

``` in the terminal and it works like a charm.

So I started to implement the command in Codesys like this:

IF take_Screenshot AND NOT take_Screenshot_old THEN
   sCommand := 'takeScreenshot';
   SysProcess.Sys Process Execute Command(sCommand, ADR(Result));
END_IF
take_Screenshot_old:=take_Screenshot;

Now the problem: It does not work
As a result I get "0" and no screenshot. But if I am trying another command like "reboot" or "ifdown" it works without any problems. I dont have a clue. Can someone help?

Thanks and Greetings
Andy

You could pipe the console output to a file and see what turns up. Perhaps something like this

IF take_Screenshot AND NOT take_Screenshot_old THEN
   sCommand := 'takeScreenshot >> log.txt';
   SysProcess.Sys Process Execute Command(sCommand, ADR(Result));
END_IF

Hi Rick,

thank you for your reply.
Unfortunatly the command is not executed by the Raspberry Pi (unlike a reboot command or similar). So no log is being created. Although it works when I am typing the exact same command in the Raspi terminal.

Greetings
Andreas

In the Codesys Log (cat /tmp/codesyscontrol.log) I get the following message

I tried to use "" as sCommand as well with the same result.