Beginner guide to editing Marlin firmware - step by step - UPDATE IN DESCRIPTION

UPDATE: Much of this is relevant, but you can no longer use Arduino to easily compile for 8 bit boards. Fortunately VS code with the Auto Build Marlin extension makes it better than ever. Full guide here:    • Updated Marlin firmware setup guide -...  

By request: a beginner’s guide on editing Marlin 3D printer firmware. This video explains what firmware is, the differences between firmware source and compiled firmware, where to get the firmware and editing software, basic concepts, specific scenarios, uploading and troubleshooting. Once you overcome the initial barrier, things will become much clearer and you’ll lean quickly.

Thanks to the Marlin developers for providing free, capable firmware, with a large range of premade configurations to help us out!

If you have any great tips for beginners, please add them in the comments.

Marlin firmware GitHub: https://github.com/MarlinFirmware/Marlin
Marlin configurations GitHub: https://github.com/MarlinFirmware/Con...
TH3D firmware download (still Marlin, but easier to configure for some printers and if you have TH3D mods): https://support.th3dstudio.com/hc/en-...
Visual Studio Code download (8 bit or 32 bit boards): https://code.visualstudio.com/

Previous relevant videos:
Marlin explained:    • Marlin firmware explained: What it is...  
Updated Marlin 2.0 software setup:    • Updated Marlin firmware setup guide -...  
Setting up Arduino IDE for Creality Melzi board:    • Ender 3 vanilla Marlin update: Concis...  
Burning a bootloader for Ender 3:    • Ender 3: How to install a bootloader ...  

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