# peng-zhihui/L-ink_Card

Smart NFC & ink-Display Card

Repository: https://github.com/peng-zhihui/L-ink_Card
Canonical: https://ross.abutalabs.com/products/l-ink_card
Language: C
License: GPL-3.0
License Family: copyleft
Last push: 2021-01-10T08:11:47+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2265, "days_push": 2061, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 7630, forks 1817 (observed 2026-08-28T04:10:02.112422+00:00)

## What it is
An open-source hardware and firmware project for a smart NFC card with an e-ink display, built on an STM32L051 MCU and ST25DV NFC chip. It includes PCB schematics, firmware, 3D-printable case files, a companion Android app, and a custom DAP-Link debugger design.

## Use cases
- build a DIY smart NFC access card with an e-ink display
- clone multiple IC access cards into one physical card
- learn STM32 low-power firmware development
- 3D print a custom case for an e-ink NFC badge
- customize what an NFC card displays via a companion app

## When to choose
- you want an open-source, hackable multi-card NFC badge with a display
- you need complete hardware files (schematics, gerbers, BOM) plus firmware in one project
- you want a hands-on embedded project combining NFC, e-ink, and STM32

## When to avoid
- you need software-level ISO 14443 card emulation - this version only switches discrete UID chips
- you want a polished consumer product rather than a DIY build requiring soldering and flashing
- you need active development or support - the project has not been updated since early 2021

## Facets
- artifact type: application
- maturity: maintenance
- function: embedded
- domain: embedded-systems, hardware, iot, developer-tools
- platform: embedded, c
- tags: nfc-card, e-ink, stm32, st25dv, diy-hardware, access-card, open-hardware, 3d-printable, nfc, e-ink-display, hardware-design, android

## Member repositories
- peng-zhihui/L-ink_Card (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:02.112422+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 2026-08-29T17:36:47.477921+00:00, confidence not recorded.
  - readme: https://github.com/peng-zhihui/L-ink_Card (fetched 2026-08-28T04:10:02.112422+00:00, sha 92d3119dfa63)
- Data as of 2026-08-30T08:39:29.467469+00:00.