# Duet3D/RepRapFirmware

OO C++ RepRap Firmware

Repository: https://github.com/Duet3D/RepRapFirmware
Canonical: https://ross.abutalabs.com/products/reprapfirmware
Language: C
License: GPL-3.0
License Family: copyleft
Last push: 2026-09-02T18:05:57+00:00

## Health v2 (maintenance only)
Score: 87/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 100, release rhythm 62, longevity 100
- inputs: {"age_days": 4618, "days_push": 0, "days_rel": 92, "gap_med": 91, "n_releases_24m": 6}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1047, forks 588 (observed 2026-09-03T02:15:05.686389+00:00)

## What it is
RepRapFirmware is object-oriented C++ firmware for controlling 3D printers and related devices on ARM Cortex-based electronics such as ATSAM4E, ATSAM4S, SAME70 and SAME5x boards. It is the firmware running on Duet controller boards and is licensed under GPLv3.

## Use cases
- control a 3D printer with Duet electronics
- run RepRap-style printers on ARM Cortex microcontrollers
- customize printer firmware behavior in C++
- port printer control firmware to supported SAM processors
- manage motion, heating and G-code execution on a printer board

## When to choose
- you use Duet or compatible ARM Cortex-based controller boards
- you want a mature, actively maintained open-source 3D printer firmware
- you need object-oriented C++ firmware you can extend
- you want RepRapFirmware features like its G-code dialect and platform support

## When to avoid
- your board only runs AVR processors like Arduino Mega
- you prefer Marlin's large community and configuration ecosystem
- you need LPC1768/STM32 support without using the separate fork
- you want a firmware configured purely through GUI tools without C++ knowledge

## Facets
- artifact type: application
- maturity: active
- function: embedded, robotics, simulation
- domain: embedded-systems, hardware
- platform: embedded, cpp
- tags: 3d-printing, firmware, reprap, cnc, gcode, arm-cortex, duet, automation

## Member repositories
- Duet3D/RepRapFirmware (main) score 87

## Provenance
- Observed fields: from GitHub, fetched 2026-09-03T02:15:05.686389+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:01:54.509863+00:00, confidence not recorded.
  - readme: https://github.com/Duet3D/RepRapFirmware (fetched 2026-09-03T02:15:05.686389+00:00, sha c439aba91d87)
- Data as of 2026-08-30T08:39:29.467469+00:00.