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Optimized firmware for RepRap 3D printers based on the Arduino platform.

# Marlin 3D Printer Firmware

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Additional documentation can be found at the Marlin Home Page.Please let us know if Marlin misbehaves in any way. Volunteers are standing by!

Marlin 2.0

Marlin 2.0 takes this popular RepRap firmware to the next level by adding support for much faster 32-bit and ARM-based boards while improving support for 8-bit AVR boards. Read about Marlin’s decision to use a “Hardware Abstraction Layer” below.

Download earlier versions of Marlin on the Releases page.

Building Marlin 2.0

To build Marlin 2.0 you’ll need Arduino IDE 1.8.8 or newer or PlatformIO. Detailed build and install instructions are posted at:

Supported Platforms

Platform|MCU|Example Boards ——–|—|——- Arduino AVR|ATmega|RAMPS, Melzi, RAMBo Teensy++ 2.0|AT90USB1286|Printrboard Arduino Due|SAM3X8E|RAMPS-FD, RADDS, RAMPS4DUE LPC1768|ARM® Cortex-M3|MKS SBASE, Re-ARM, Selena Compact LPC1769|ARM® Cortex-M3|Smoothieboard, Azteeg X5 mini, TH3D EZBoard STM32F103|ARM® Cortex-M3|Malyan M200, GTM32 Pro, MKS Robin, BTT SKR Mini STM32F401|ARM® Cortex-M4|ARMED, Rumba32, SKR Pro, Lerdge, FYSETC S6 STM32F7x6|ARM® Cortex-M4|The Borg, RemRam V1 SAMD51P20A|ARM® Cortex-M4|Adafruit Grand Central M4 Teensy 3.5|ARM® Cortex-M4| Teensy 3.6|ARM® Cortex-M4|

Submitting Changes

Marlin Support

For best results getting help with configuration and troubleshooting, please use the following resources:


The current Marlin dev team consists of:


Marlin is published under the GPL license because we believe in open development. The GPL comes with both rights and obligations. Whether you use Marlin firmware as the driver for your open or closed-source product, you must keep Marlin open, and you must provide your compatible Marlin source code to end users upon request. The most straightforward way to comply with the Marlin license is to make a fork of Marlin on Github, perform your modifications, and direct users to your modified fork.

While we can’t prevent the use of this code in products (3D printers, CNC, etc.) that are closed source or crippled by a patent, we would prefer that you choose another firmware or, better yet, make your own.

To restore the repository download the bundle


and run:

 git clone MarlinFirmware-Marlin_-_2019-12-03_11-42-32.bundle 

Uploader: MarlinFirmware
Upload date: 2019-12-03