website/input/projects/3d-printing/octotray.md

title: OctoTray description: Linux PyQt tray application to control OctoPrint parent: 3d-printing position: 35 comments: true github: https://git.xythobuz.de/thomas/OctoTray

date: 2021-05-08

…back to 3D-Printing overview

To quickly print new stuff on one of my printers, I am using the OctoPrint integration of PrusaSlicer. Unfortunately, it does not allow me to turn on the printers power supply using the Raspberry Pi. But it is possible to do that via the OctoPrint REST API. Because of that, I wrote a small tool to trigger the power of my printers that lives in the system tray. It runs on Linux using the Python Qt5 bindings.

You need to enter the hostnames / IPs and the API keys of your printers at the beginning of the python file in the repo. The program will automatically detect if you are using the PSU Control OctoPrint Plugin it will use that to toggle the power. Otherwise it looks for custom system commands, named “all on” and “all off”, as described in the OctoPrint docs. Mine look like this.

system:
    actions:
    -   action: all on
        command: gpio -g mode 20 out && gpio -g write 20 0 && gpio -g mode 26 out
            && gpio -g write 26 0
        name: Turn on printer & lights
    -   action: all off
        command: gpio -g write 20 1 && gpio -g mode 20 in && gpio -g write 26 1 &&
            gpio -g mode 26 in
        confirm: You are about to turn off the printer and the lights.
        name: Turn off printer & lights
    -   action: lights on
        command: gpio -g mode 20 out && gpio -g write 20 0
        name: Turn on lights
    -   action: lights off
        command: gpio -g write 20 1 && gpio -g mode 20 in
        name: Turn off lights
    -   action: printer on
        command: gpio -g mode 26 out && gpio -g write 26 0
        name: Turn on printer
    -   action: printer off
        command: gpio -g write 26 1 && gpio -g mode 26 in
        confirm: You are about to turn off the printer.
        name: Turn off printer

You can find the project on my Gitea server or on GitHub.

I also wrote a bit more about my OctoPrint setups on this page.