# vroland/epdiy

EPDiy is a driver board for affordable e-Paper (or E-ink) displays.

Repository: https://github.com/vroland/epdiy
Canonical: https://ross.abutalabs.com/products/epdiy
Homepage: https://vroland.github.io/epdiy-hardware/
Language: C
License: LGPL-3.0
License Family: copyleft
Last push: 2026-08-23T20:29:17+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 95, longevity 100
- inputs: {"age_days": 2497, "days_push": 10, "days_rel": 32, "gap_med": 0, "n_releases_24m": 4}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1911, forks 265 (observed 2026-08-28T04:05:53.156677+00:00)

## What it is
EPDiy is a driver board and accompanying software library for driving affordable E-Paper (E-Ink) display modules, typically salvaged from e-readers, using ESP32/ESP32-S3 microcontrollers. It provides 4bpp 16-grayscale rendering support with WiFi/Bluetooth connectivity, LiPo battery charging, and drivers for both ESP-IDF and Arduino.

## Use cases
- drive a cheap e-ink display from an old e-reader with an ESP32
- build an e-paper weather station
- make an e-paper picture frame
- create a serial terminal display for a Raspberry Pi
- build a battery-powered e-ink dashboard
- display images from Immich on an e-paper screen
- build a low-power e-ink music player dashboard

## When to choose
- you want to drive bare e-paper display matrices with 16-level grayscale at good speeds
- you need WiFi/Bluetooth alongside an e-ink display
- you want ultra-low deep sleep power draw on battery
- you prefer ESP-IDF or Arduino tooling for embedded display projects

## When to avoid
- you need a ready-made consumer e-ink module with connector and support out of the box
- your display is not one of the supported matrix-based e-paper panels or lacks a compatible connector/adapter
- you need fast full-color e-paper updates
- you require Arduino IDE performance on V7 boards, where update speeds are significantly lower

## Facets
- artifact type: library
- maturity: active
- function: embedded, graphics, sdk, developer-tools
- domain: embedded-systems, hardware, cross-platform, developer-tools
- platform: embedded, iot, cpp, c
- tags: e-paper, e-ink, esp32, esp32s3, display-driver, arduino, esp-idf, diy-hardware, lipo-battery, grayscale

## Member repositories
- vroland/epdiy (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:53.156677+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 2026-08-30T03:11:02.928355+00:00, confidence not recorded.
  - readme: https://github.com/vroland/epdiy (fetched 2026-08-28T04:05:53.156677+00:00, sha 7921800d978a)
  - homepage: https://vroland.github.io/epdiy-hardware/ (fetched 2026-08-29T10:49:58.446634+00:00, sha 91ab3c335242)
- Data as of 2026-08-30T08:39:29.467469+00:00.