How to work with Gcode System Commands Properly

Get Help
1

I am very new to most of this so please forgive my ignorance. Basically I am wanting to control a servo motor with a python program using the Gcode System Command. So what I did was proof out my python code so that it properly executes. It is located in /share/Swipper.py. I then created a .sh program that simply calls this python program and it's located in the same folder. I then assigned OCTO10 to /share/Swipper.sh & . This run on the terminal of Octoprint doesn't seem to modify the Servo position but when I am on CLI I try to run ./share/Swipper.sh and it says no attribute found. So then I "cd" into the /share folder and run ./Swipper.sh and it performs exactly as I would expect. So I am wondering how do I need to write these programs in order to get OCTO10 to work properly. It seems like nothing I am trying is having an effect. Below is my code:

<Swipper.sh>

#!/bin/bash
sudo python3 /share/Swipper.py &

any help would be much appreciated.

2

Do you have passwordless sudo configured? By default OctoPi does not and you need the password for most commands (there are exceptions for services and shutdown).

Test the script locally too.

3

I actually did get it to finally work. I found how to use my password in an echo statement to allow the "sudo" command and then I found that in the octoprint settings that I need to add it a little differently.

So my script looks like this:

#!/bin/bash
echo <mypassword> | sudo python3 /share/Swipper.py &

and my OCTO10 settings are simply

/share/Swipper.sh &
4

Holy cow, DO NOT DO THIS. Use sudo and the sudoers file, don't hard code your password in some random script :astonished:

2 Likes