moggieuk/Happy-Hare
MMU software driver for Klipper (ERCF, Tradrack, Box Turtle, Night Owl, QuattroBox, Angry Beaver, 3MS, VVD, KMS, EMU...) observed · 2026-09-03
Health v2 · maintenance only
74/100
- Activity 100
- Release rhythm 35
- Longevity 83
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 1171
- days_rel: n/a
- days_push: 0
- n_releases_24m: 0
Adoption not part of the score
1055 stars · 240 forks observed · 2026-09-03
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Happy Hare is a universal Klipper extension (Python modules and macros) that drives multi-material units (MMUs) and automated filament changers for multi-color 3D printing. It supports many MMU designs such as ERCF, Tradrack, Box Turtle, 3MS, and QuattroBox, with an installer and extensive configuration options.
Use cases
- control a multi-material unit with Klipper for multicolor prints
- automatically swap filaments during a 3D print
- set up an ERCF or Box Turtle filament changer
- switch MMU hardware without rewriting printer firmware
- calibrate and configure filament sensors and selector movement
When to choose
- you run Klipper and want multi-color printing with an MMU or filament changer
- you want one software driver that supports many MMU designs
- you need configurable macros and an installer for popular MMU hardware
When to avoid
- your printer runs Marlin or another non-Klipper firmware
- you want a plug-and-play commercial solution with no configuration
- you only do single-material printing
Facets
library · maturity active
embedded workflow-automation developer-tools configuration-management hardware embedded-systems python embedded klipper 3d-printing mmu filament-changer multicolor-printing ercf firmware-extension automation linux
1 source
- readme: https://github.com/moggieuk/Happy-Hare · fetched 2026-09-03 · f2e6d1441f57
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| moggieuk/Happy-Hare | main | 74 |
For agents
markdown · JSON · MCP: product_card(name="moggieuk/Happy-Hare")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem