Product

yemaozi9873.7″ black-and-white e-ink terminal

The production board from the YEMAOZI e-ink terminal platform. One device that is an e-book reader, a music player, an audiobook player, a comic reader and a diary — plus a single-page web console that manages all of it.

Open the web console Full technical notes Back to home

Capabilities

Five jobs, one panel

Not five apps in one shell. The refresh cost of an e-ink panel rules out carrying much at once, so this interface compresses six entries onto one page, and every page answers exactly one question.

E-books

TXT and EPUB, four type sizes, and your place is remembered across power loss. Chinese goes through a GB18030 table, so older non-UTF-8 files do not turn to noise.

Music

A library off the TF card. MP3, FLAC and WAV. While it plays, only the region that changed is refreshed — the panel never strobes.

Audiobooks

Organised by book and chapter, each chapter keeping its own place. Sleep timer and playback speed included.

Comics

MOBI and EPD, read a page at a time, resampled from grey to mono so the strokes stay clean.

Calendar & to-dos

Lunar dates and solar terms computed on the device, no network. To-dos live on the card, shared by the device and the web console.

Web console

Join the access point and manage books, media, backups, battery and firmware updates from a browser.

Interface

The interface

Six entries on one page. Each page answers exactly one question.

yemaozi987 desktop: a now-playing card up top, six app icons in the middle, a to-do reminder at the bottom. — DesktopSix entries, a now-playing card on top, a to-do line below. No cursor on a touch panel, so no selection frame.

yemaozi987 music player: a status row on top, a record and waveform in the middle, then track name, timing, progress bar, volume and skip buttons. — Music playerRecord, waveform, progress and volume, refreshed as it plays.

yemaozi987 audiobook page: a back arrow and title up top, a cover with vertical title and author, then chapter, progress bar, four round transport keys and two setting chips. — AudiobookVertical cover type, chapter, progress and four round keys.

Calendar page: days carrying to-dos are marked with a small box. — CalendarA month with lunar dates and solar terms; to-dos marked as small boxes.

yemaozi987 music library: a title up top, then numbered track names. — Music libraryLibrary off the TF card; tapping a row plays it.

Settings page: eight tiles in two columns. — SettingsEight tiles in two columns; each carries a border, an icon and a label, nothing else.

Hardware

A 3.7-inch black-and-white panel in a warm white shell, with a perforated speaker grille and a camera across the top. Small enough to hold in one hand on a commute, and it fits on a bedside table.

Panel	3.7″ 240 × 416 black-and-white, fast refresh
Touch	Capacitive multi-touch
SoC	ESP32-S3 dual core
Memory	16 MB flash / 8 MB PSRAM
Audio	I2S digital amplifier, on-board speaker and headphone out
Storage	TF card for media and fonts
Network	WiFi access point and station, Bluetooth
Keys	Power, volume up, volume down, play/pause
Power	Single lithium cell, battery estimated from voltage

yemaozi9873.7&Prime; black-and-white e-ink terminal