# bitcraze/crazyflie-firmware

The main firmware for the Crazyflie Nano Quadcopter, Crazyflie Bolt Quadcopter and Roadrunner Positioning Tag.

Repository: https://github.com/bitcraze/crazyflie-firmware
Canonical: https://ross.abutalabs.com/products/crazyflie-firmware
Language: C
License: GPL-3.0
License Family: copyleft
Last push: 2026-08-26T11:37:38+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 86, longevity 100
- inputs: {"age_days": 4576, "days_push": 7, "days_rel": 13, "gap_med": 66.0, "n_releases_24m": 9}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1532, forks 1272 (observed 2026-08-28T04:04:59.555178+00:00)

## What it is
The main open-source firmware for Bitcraze's Crazyflie Nano Quadcopter, Crazyflie Bolt, and Roadrunner Positioning Tag, written in C. It provides flight control, positioning, and expansion capabilities for these small drone platforms.

## Use cases
- flash custom firmware onto a Crazyflie quadcopter
- modify drone flight control code for research experiments
- build a Roadrunner positioning tag for indoor localization
- develop custom drone behaviors for swarm robotics
- contribute to open-source drone firmware

## When to choose
- you own a Crazyflie 2.x, Bolt, or Roadrunner device and want to customize its behavior
- you are doing robotics research with small quadcopters
- you need a well-documented open-source drone firmware to extend

## When to avoid
- you need firmware for a different drone platform
- you want a high-level drone SDK without touching embedded C code
- you need a plug-and-play commercial drone solution

## Facets
- artifact type: application
- maturity: active
- function: embedded, robotics, simulation
- domain: robotics, embedded-systems
- platform: embedded, cross-platform
- tags: quadcopter, firmware, crazyflie, drone, positioning, roadrunner, real-time, drones, linux

## Member repositories
- bitcraze/crazyflie-firmware (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:59.555178+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 2026-08-30T04:31:18.726653+00:00, confidence not recorded.
  - readme: https://github.com/bitcraze/crazyflie-firmware (fetched 2026-08-28T04:04:59.555178+00:00, sha 76dee62f71e0)
- Data as of 2026-08-30T08:39:29.467469+00:00.