nrf52840-promicro SKILL.md skillA
nrf52840-promicro from alexex1993/mcu-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add alexex1993/mcu-skills/nrf52840-promicro@git:20261030.816967fPins git:20261030.816967f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- alexex1993/mcu-skills
- Path
skills/nrf/nrf52840-promicro/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261030.816967f, committed Oct 30, 2026
- First version recorded
- Aug 27, 2026
- Size
- 17,024 bytes
- Repository stars
- 26
- License
- MIT
Firmware development for the ProMicro nRF52840 (V1940) — the nice!nano v2 compatible clone also sold as SuperMini nRF52840, nRF52840 Pro Micro or nRFMicro (nRF52840 QIAA, Cortex-M4F @ 64 MHz, 1 MB flash / 256 KB RAM, BLE 5 + 802.15.4, native USB, Adafruit UF2 bootloader with SoftDevice S140). Covers the PlatformIO + Adafruit nRF52 Arduino setup for a board that ships in neither, the vendored board definition and Pro Micro pin map, USB CDC via TinyUSB, Bluefruit BLE, the 32.768 kHz crystal that…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# ProMicro nRF52840 (V1940) A nice!nano v2 clone: nRF52840 module on a Pro Micro footprint, USB-C, factory Adafruit UF2 bootloader with SoftDevice S140 6.1.1. Sold as *ProMicro nRF52840*, *SuperMini nRF52840*, *nRF52840 Pro Micro*; the ZMK/QMK wireless keyboard crowd is where most of the documentation lives. Its failure modes are quiet and all look like "the board is dead": the board is in neither PlatformIO's board list nor the Arduino core's variant list, so half of what a tutorial tells you to type does not apply; a missing 32.768 kHz crystal hangs the SoftDevice with USB still enumerated; and `Serial` does not exist until you include a library that the code never otherwise mentions. - `reference/board-hardware.md` — the complete board reference: full pin map (silkscreen → Arduino number → P0.xx/P1.xx → peripheral), power, flash and RAM maps, bootloader layout, clocks, **plus** a development guide (Part II: §7 toolchain, §8 peripheral cookbook, §9 flashing and recovery, §10 the Zephyr board target, §11 symptom → cause → fix table). - `reference/recipes.md` — copy-paste code: `platformio.ini`, the board JSON, …
Read the whole file at its exact version.
How to install
mdr add alexex1993/mcu-skills/nrf52840-promicro@sha256:4ff1f44971485905The line at the top of this page pins the label git:20261030.816967f, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_qxbi7gbaldihzyx2)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Aug 27, 2026 and Oct 30, 2026, about one every 64 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261030.816967f latest | 2026-10-30 | 816967f | 17,024 B | A | view · diff |
| git:20260827.86b4e50 | 2026-08-27 | 86b4e50 | 16,961 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (17024 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
alexex1993/mcu-skills · 26 stars · license MIT · pushed 2026-10-30 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_qxbi7gbaldihzyx2 GET https://markdownregistry.com/api/v1/resolve?ref=alexex1993/mcu-skills/nrf52840-promicro GET https://markdownregistry.com/api/v1/blob/4ff1f449714859055ca1a1ed25d813ce690f9260c9ce455f418a101dd07b4176
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.