# rogerclarkmelbourne/STM32duino-bootloader

Bootloader for STM32F103 boards, for use with the Arduino_STM32 repo and the Arduino IDE

Repository: https://github.com/rogerclarkmelbourne/STM32duino-bootloader
Canonical: https://ross.abutalabs.com/products/stm32duino-bootloader
Language: C
License Family: other
Last push: 2024-04-16T14:57:10+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4128, "days_push": 869, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1083, forks 524 (observed 2026-08-28T04:03:31.329505+00:00)

## What it is
A USB bootloader for STM32F103 microcontroller boards, derived from the Leaflabs maple-bootloader, designed for use with the Arduino_STM32 core and Arduino IDE. It supports Maple boards and generic STM32F103 boards with multiple build targets for different LED and button pin configurations.

## Use cases
- upload Arduino sketches to STM32F103 boards over USB without a serial adapter
- flash firmware to generic STM32F103 blue pill boards
- use DFU protocol to program STM32 microcontrollers
- enable USB re-enumeration on boards without Maple reset hardware
- bootload Maple mini and Maple clone boards

## When to choose
- you are using the Arduino_STM32 core with the Arduino IDE on STM32F103 hardware
- you want USB firmware uploads on a Maple or generic STM32F103 board without a USB-serial converter
- you need a lightweight, hobby-grade bootloader for STM32F103

## When to avoid
- you are using the official STM32duino core (STM32Duino core by STMicroelectronics) which uses its own bootloader approach
- you need a certified, standards-compliant USB implementation for commercial or safety-critical products
- your board is not STM32F103 or lacks a ~1.5k pull-up on PA12

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: embedded, developer-tools
- domain: embedded-systems, hardware, developer-tools
- platform: embedded, cross-platform
- tags: stm32, bootloader, arduino, dfu, firmware, microcontroller

## Member repositories
- rogerclarkmelbourne/STM32duino-bootloader (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:31.329505+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 2026-08-30T06:51:12.101587+00:00, confidence not recorded.
  - readme: https://github.com/rogerclarkmelbourne/STM32duino-bootloader (fetched 2026-08-28T04:03:31.329505+00:00, sha 6bdad149284a)
- Data as of 2026-08-30T08:39:29.467469+00:00.