ClaudSkills / Engineering / engineering-misc

Stm32f401rc Blackpill

Q: What is a Claude Code skill and how does the Stm32f401rc Blackpill skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Stm32f401rc Blackpill is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Engineering · Sub-category: engineering-misc · Last updated: 2026-10-25

Firmware development for the 40-pin "Black Pill"-format board with an STM32F401RCT6 (STM32F401RC, LQFP64, 256 KB flash, 64 KB RAM, 84 MHz) that ships with the WeAct Studio HID Bootloader (USB 0483:572A, flash 0x08000000-0x08003FFF, app at 0x08004000) — its PC13 LED, KEY button on PA0, 25 MHz HSE, USB-C on USB_OTG_FS, and the PlatformIO + STM32Cube HAL setup around them, including a USB CDC virtual COM port for printf debugging. Use when working on this board, an unbranded F401RCT6 Black Pill clone, or any STM32F401/F411 board that enumerates as "WeAct Studio HID Bootloader": project setup, platformio.ini, linking at 0x08004000, flashing through the HID bootloader or ROM DFU, the app starting behind a bootloader (VTOR, SysTick, clock hand-off), clock/PLL configuration for 84 MHz plus 48 MHz USB, printf/serial console over USB (no /dev/cu or COM port), a blink that never starts or hangs in HAL_Delay, entering or recovering the bootloader, or debugging why something on the board does not work.

Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

Board-specific firmware knowledge. The board's defining feature is not the chip but what sits in the first 16 KB of its flash: WeAct's HID bootloader. Almost every failure on this board comes from code that assumes it owns 0x08000000 and a freshly reset chip — neither is true here. Read the reference files rather than guessing.

What this skill does

Stm32f401rc Blackpill is a community-contributed Claude Code skill in the engineering-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/stm32f401rc-blackpill/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when working on this board, an unbranded F401RCT6 Black Pill clone, or any STM32F401/F411 board that enumerates as "WeAct Studio HID Bootloader": project setup, platformio.ini, linking at 0x08004000, flashing through the HID bootloader or ROM DFU, the app starting behind a bootloader (VTOR, SysTick, clock hand-off), clock/PLL configuration for 84 MHz plus 48 MHz USB, printf/serial console over USB (no /dev/cu or COM port), a blink that never starts or hangs in HAL_Delay, entering or recovering the bootloader, or debugging why something on the board does not work.

Who uses this skill

The Stm32f401rc Blackpill Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 211,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/stm32f401rc-blackpill
curl -L https://claudskills.com/skills/stm32f401rc-blackpill/SKILL.md \
  -o ~/.claude/skills/stm32f401rc-blackpill/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/stm32f401rc-blackpill/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/stm32f401rc-blackpill/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\stm32f401rc-blackpill\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Stm32f401rc Blackpill Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/stm32f401rc-blackpill/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Stm32f401rc Blackpill skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Stm32f401rc Blackpill skill?

Use Stm32f401rc Blackpill when your Claude Code task falls under the Engineering category — specifically in the engineering misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Stm32f401rc Blackpill" or describe the task and let Claude pick). Browse related skills at /category/engineering/.

What is a Claude Code skill and how does the Stm32f401rc Blackpill skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Stm32f401rc Blackpill is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/alexex1993/mcu-skills/blob/HEAD/skills/stm32/stm32f401rc-blackpill/SKILL.md
License: MIT
Author: alexex1993
Website: https://habr.com/ru/articles/1076082/

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

alexex1993. (2026). Stm32f401rc Blackpill [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/stm32f401rc-blackpill/

BibTeX

@misc{stm32f401rc-blackpill-2026,
  author    = {alexex1993},
  title     = {Stm32f401rc Blackpill [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/stm32f401rc-blackpill/}
}

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Security scan

Grade A · scanned 2026-10-25 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

✓ Prompt injection
✓ Data exfiltration
✓ Supply chain
✓ Reverse shell
✓ Credentials
✓ Execution
✓ Filesystem
✓ Persistence
✓ Obfuscation
✓ Network

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/stm32f401rc-blackpill/#security)

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Browse all Engineering skills → Top 100 skills

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