# OpenEPaperLink/OpenEPaperLink

The OpenEPaperLink core project

Repository: https://github.com/OpenEPaperLink/OpenEPaperLink
Canonical: https://ross.abutalabs.com/products/openepaperlink
Homepage: https://openepaperlink.org
Language: C
License: NOASSERTION
License Family: other
Last push: 2026-08-25T17:18:47+00:00

## Health v2 (maintenance only)
Score: 92/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 80, longevity 97
- inputs: {"age_days": 1369, "days_push": 8, "days_rel": 57, "gap_med": 63.5, "n_releases_24m": 9}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1810, forks 180 (observed 2026-08-28T04:05:39.485412+00:00)

## What it is
OpenEPaperLink is an open-source alternative firmware and 802.15.4-based protocol for repurposing commercial electronic shelf labels (e-paper tags) as custom wireless displays. It consists of tag firmware and ESP32-based access point firmware, with a web interface and Home Assistant integration for driving display content.

## Use cases
- turn electronic shelf labels into custom e-paper displays
- build a DIY e-ink dashboard with ESP32 access point
- show Home Assistant sensor data on e-paper tags
- repurpose store price tags for home automation
- create low-power wireless e-paper signage
- flash custom firmware onto ZBS243-based shelf labels

## When to choose
- you want an open, self-hosted alternative to proprietary ESL systems
- you already own compatible electronic shelf labels and an ESP32
- you need extremely low-power (µA-level) wireless e-paper displays
- you use Home Assistant and want tags as integrated devices

## When to avoid
- you need commercial/production deployment - the license is CC BY-NC-SA (non-commercial)
- you want plug-and-play without flashing hardware or building access points
- you need high-bandwidth image streaming - transfers are ~5kB/s
- you require guaranteed real-time updates - check-in latency is 40+ seconds

## Facets
- artifact type: application
- maturity: active
- function: embedded, networking, self-hosted
- domain: iot, embedded-systems, hardware
- platform: embedded, iot, cross-platform
- tags: e-paper, electronic-shelf-labels, 802.15.4, esp32, firmware, home-assistant, e-ink, wireless-protocol, diy-hardware, automation

## Member repositories
- OpenEPaperLink/OpenEPaperLink (main) score 92

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:39.485412+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 2026-08-30T03:21:17.286690+00:00, confidence not recorded.
  - readme: https://github.com/OpenEPaperLink/OpenEPaperLink (fetched 2026-08-28T04:05:39.485412+00:00, sha 2a621dd86feb)
  - homepage: https://openepaperlink.org (fetched 2026-08-29T11:00:01.681499+00:00, sha 90c82ede08de)
  - site_page: https://install.openepaperlink.org/ (fetched 2026-08-29T11:00:01.684168+00:00, sha 61061b608628)
- Data as of 2026-08-30T08:39:29.467469+00:00.