CrossPoint Reader

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About CrossPoint Reader

CrossPoint Reader is an open-source firmware for the Xteink X4 e-paper reader, designed as a fully customizable and privacy-friendly alternative to the stock firmware. Built using PlatformIO for the ESP32-C3 microcontroller, CrossPoint focuses on delivering an optimized EPUB reading experience on constrained hardware while giving users complete control over their device. It supports EPUB 2 and EPUB 3 rendering, configurable layouts, Wi-Fi uploads, OTA updates, KOReader Sync integration, multilingual reading support, and extensive customization options for fonts, display, and reading workflows. The project emphasizes openness, hackability, and community-driven development for e-paper reading devices.

Key Features

• Open-source replacement firmware for Xteink X4
• EPUB 2 and EPUB 3 parsing and rendering
• Image support within EPUB documents
• Saved reading position and progress tracking
• Wi-Fi book upload and OTA firmware updates
• KOReader Sync integration for cross-device progress
• Customizable fonts, layout, and display settings
• Screen rotation support
• Multi-language EPUB reading support
• Lightweight firmware optimized for ESP32-C3 hardware
• SD card caching system for low-memory operation
• Community-driven extensibility and customization

Useful Links