xteink-plugins

A plugin system for customizing and extending https://github.com/crosspoint-reader/crosspoint-reader firmware on your xteink device. Plugins are applied as source-level patches before the firmware is compiled and flashed.

Plugins

Dark Mode

Adds a Dark Mode option to the Plugins settings tab and the web interface Settings page. When enabled, the screen is inverted after each page render, producing white-on-black text across all reader formats (EPUB, TXT, and XTC).

State	Effect
Disabled	Normal display (default)
Enabled	Screen inverted — white text on black background

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Smaller Fonts

Adds a Smaller Fonts option to the Plugins settings tab and the web interface Settings page. When enabled, your chosen reader font is transparently substituted with a smaller variant — no need to change your font preference.

Mode	Effect
Disabled	No change (default)
Smaller	Drops the current font size down by one step (e.g. Bookerly 16 → 14)
Smallest	Drops the current font size down by two steps (e.g. Bookerly 16 → 12)

Supports Bookerly, Noto Sans, and OpenDyslexic. The plugin also generates and embeds Bookerly at 8pt and 10pt — sizes not included in the stock firmware.

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Lockscreen

Adds a customizable Lockscreen experience to your xteink device.

This plugin introduces a dedicated lockscreen activity that is shown when the device wakes or powers on.

Features:

• Custom lockscreen activity integrated into firmware
• Four-digit PIN configurable on plugin enable
• Displays on device wake or power-on
• Replaces default wake screen behavior
• Clean UI consistent with CrossPoint Reader

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Bookerly Font

Adds the Bookerly font to your xteink device, available as a reader font option alongside the built-in Noto Serif, Noto Sans, and OpenDyslexic fonts.

• Generates Bookerly at 12pt, 14pt, 16pt, and 18pt during install
• Also generates 8pt and 10pt variants for use with the Smaller Fonts plugin
• Selectable via Settings → Reader → Font

Requires the Smaller Fonts plugin to be installed if you want to use Bookerly at sizes below 12pt.

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Hardcover Sync

Automatically syncs your reading progress between your xteink device and https://hardcover.app.

• Extracts ISBN metadata from EPUB files to identify books
• Tracks reading progress (page numbers) while you read
• Automatically syncs progress for books with > 0% completion
• Marks books as "Read" when you reach 100%+ completion
• Requires a Hardcover API token configured in Settings

Books without ISBN metadata or at 0% completion are skipped. 100%+ completed books are automatically moved to your "Read" shelf on Hardcover.

Requirements:

• Active internet connection via WiFi
• Hardcover account and API token
• Books with embedded ISBN metadata

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GitHub Sync

Syncs .epub files from a private GitHub repository to your device on boot.

• Downloads new or updated books from your configured repo automatically on startup
• Skips files already on the device that haven't changed
• Configurable via Settings → Plugins → GitHub Sync (username, personal access token, repo, branch)
• Credentials can also be pre-configured during install

Requirements:

• Active internet connection via WiFi
• GitHub account with a repository containing your .epub files
• Personal access token with read-only Contents access to the repo

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Requirements

• Python 3.10+
• PlatformIO (pio on your PATH)
• git
• Your xteink device connected via USB

Install Python dependencies with:

pip3 install -r requirements.txt

Usage

From the root of this repository, run:

python3 install.py

To auto-accept all plugin prompts, pass --yes (or -y):

python3 install.py --yes

By default this uses the default build environment. To use a different environment pass --environment (or -e):

python3 install.py --environment slim python3 install.py --environment gh_release

Flags can be combined:

python3 install.py -y -e gh_release

Environment	Description
default	Debug logging enabled, version from current git branch (recommended)
gh_release	Info logging only, version hardcoded to release tag
slim	No serial logging, smallest binary size

The installer will:

1. Clone the CrossPoint Reader source repository
2. Prompt you to select which plugins to install and apply them as patches
3. Build the firmware with PlatformIO
4. Auto-detect your device's serial port and flash the firmware

Note: This script modifies and flashes custom firmware to your device. The author accepts no responsibility for any damage that may occur to your device as a result of using this installer.

Repository Structure

xteink-plugins/
├── install.py              # Interactive installer: clone → patch → build → flash
└── plugins/
    ├── darkmode/
    │   ├── patch.py
    │   ├── DarkModePlugin.h/.cpp
    │   └── DarkModeSettingsPage.h/.cpp
    ├── smallerfonts/
    │   ├── patch.py
    │   ├── SmallerFontsPlugin.h/.cpp
    │   └── SmallerFontsSettingsPage.h/.cpp
    ├── lockscreen/
    │   ├── patch.py
    │   ├── LockscreenPlugin.h/.cpp
    │   ├── LockscreenSettingsPage.h/.cpp
    │   └── LockscreenActivity.h/.cpp
    ├── bookerly/
    │   ├── patch.py
    │   └── BookerlyPlugin.h/.cpp
    ├── hardcover/
    │   ├── patch.py
    │   ├── HardcoverPlugin.h/.cpp
    │   └── HardcoverSyncActivity.h/.cpp
    └── githubsync/
        ├── patch.py
        ├── GitHubSync.h/.cpp
        └── GitHubSyncSettingsActivity.h/.cpp

Troubleshooting

Linux: Permission denied when flashing

If you see an error like: Could not open /dev/ttyACM0, the port is busy or doesn't exist or Permission denied

Run:

sudo usermod -aG dialout $USER

Log out and log back in for the change to take effect, then re-run install.py.

Windows: 'pio' is not recognized

If you see: 'pio' is not recognized as an internal or external command

Run in PowerShell:

$env:PATH += ";$env:USERPROFILE.platformio\penv\Scripts" [Environment]::SetEnvironmentVariable("PATH", $env:PATH, "User")

If Python was installed from the Microsoft Store:

$scripts = (Get-ChildItem "$env:USERPROFILE\AppData\Local\Packages" -Filter "Scripts" -Recurse -ErrorAction SilentlyContinue | Where-Object { $_.FullName -like "Python" } | Select-Object -First 1).FullName $env:PATH += ";$scripts" [Environment]::SetEnvironmentVariable("PATH", $env:PATH, "User")

Restart your terminal and re-run install.py.

Adding a Plugin

1. Create a new directory under plugins/ with your plugin's name.
2. Add a patch.py file with a patch(repo_dir: str) function.

The installer will automatically discover and offer to install any directory under plugins/ that contains a patch.py.