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3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: !functionalprint@kbin.social or !functionalprint@fedia.io
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As you've already noticed, the default way to get Octoprint running is by running it on an RPi with OctoPi as its operating system and connecting that to your printer using a serial connection, which basically means connecting a USB cable in your case.
The docker container gets interesting if your home server is physically close enough to your printer that you can connect the printer directly. Then you can just mount the serial connection into the container and run Octoprint there, cutting out the need for a RPi.
As others already said, the Prusa Mini also has PrusaLink integrated into its , which is an alternative to Octoprint and only needs the printer connected to your network via Ethernet or Wi-Fi with the Wi-Fi upgrade.