CrossPoint Reader: Firmware for the Xteink X4 e-paper display reader
Summary
CrossPoint Reader provides an open-source firmware for the Xteink X4 e-paper reader with EPUB support and extensive customization. It uses PlatformIO on the ESP32-C3, includes a caching system on SD cards to reduce RAM usage, and documents installation, debugging, and development workflows. It emphasizes independence from the manufacturer and offers KOReader Sync integration and OTA updates.