Marlin firmware is the world’s most popular 3D printer firmware. It runs on an 8-bit controller board, making it affordable, and it’s fully open source and free to use. It’s ideal for companies like Creality, who produces the Ender 3, to modify and add to their machines.
While the Ender 3 is a great machine – it was even our winter 2018/19 pick for the “Best 3D Printer Under $200” – its lower cost means some extras are not included. But, fear not, this guide will explain how to upgrade your Ender 3 using Marlin.
If you don’t have an Ender printer, check out our general guide on installing firmware.