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Project record

OpenCat

OpenCatFramework for building and programming quadruped robots.MIT
Field notes / 132OpenCat
I / Function

Framework for building and programming quadruped robots.

OpenCat provides firmware and programming tools for quadruped robots using the legacy NyBoard platform, including the original Bittle and Nybble. It coordinates servos, walking gaits, and IMU input on Arduino-based hardware, with programming and control options including C/C++ and Python. The repository supports robot setup and calibration; current ESP32-based Petoi hardware uses a separate implementation.

OpenCat README · Reviewed 2026-10-28

A four-legged cane-and-ceramic automaton lifts one jointed foot around a suspended magenta balancing stone.
Awesome Open* · Field recordOpenCatOP-7FAC8011 · Folio 132Domain: Robotics & Hardware
  1. 01 / Feature noteQuadruped motion

    Coordinate up to twelve servos on NyBoard hardware for robot movement and gait execution.

    Feature source ↗
  2. 02 / Feature noteRobot calibration

    Calibrate the IMU and robot joints during setup using the documented firmware and control interfaces.

    Feature source ↗
II / Repository record

GitHub stars

5,538

Detected license

MIT

Repository created

2021-01-03

Repository push

2026-09-08

III / Observations & evidence

GitHub stars

Unknown

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Window mismatch; awaiting refresh

Cached history uses a different month window; chart withheld until aligned.

Latest attempt: ok · Checked 2026-10-15T23:34:55.975088+00:00 · Last successful fetch 2026-10-15T23:34:55.975088+00:00 · Provider source

Hacker News stories

Unknown

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Not recorded

OpenSSF Scorecard

Unknown

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Unavailable

No result returned.

Checked 2026-10-27T00:58:00Z · Latest attempt: not found · Provider source

IV / Release record

GitHub release

1.2.5

Published 2025-06-23

i
Available

Checked 2026-11-04T04:26:56Z · Last successful fetch 2026-11-04T04:26:56Z · Value fetched 2026-11-04T04:26:56Z · Provider source

V / Where it runs

Unknown

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Not reviewed