CrossPoint Reader: Open Source Firmware Transforms Xteink X4 eReader Experience

The Xteink X4 is a compact eBook reader that's smaller than most smartphones, measuring just 114 x 69 x 5.9mm (4.49 x 2.72" X 0.23") and weighing only 74 grams (2.6 ounces). The company positions it as an eReader that sticks magnetically to the back of a phone, though it also works as a standalone pocket-sized device with a 4.2 inch E Ink display. Priced at $69, it's an affordable option for readers who prioritize portability.

However, the out-of-the-box experience with the default firmware has frustrated some users. The stock software is quite limited, supporting only DRM-free EPUB and TXT files along with basic image formats like JPEG, PNG, and BMP. Users are restricted to just two font sizes (medium and small), and since the device lacks a touchscreen, navigation relies entirely on unlabeled physical buttons whose functions change depending on the current screen.

Enter CrossPoint Reader, an ambitious open source firmware replacement that's already making waves in the Xteink community. Despite the X4 being a relatively new device that launched only a few months ago, an active community has emerged, releasing tools and documentation to enhance the user experience. CrossPoint Reader represents one of the most comprehensive efforts to date.

This firmware replacement addresses many of the default software's shortcomings by offering:

• Better text formatting and eBook layouts
• More font sizes and configuration options
• An improved menu system
• Better tools for transferring eBooks to the device
• Support for additional languages

While CrossPoint Reader is still a work in progress, it's already functional enough to significantly improve the Xteink X4 experience. Some planned features remain incomplete, such as support for adding custom fonts and viewing images within EPUB files. Additionally, certain hardware limitations can't be overcome through software alone - the device notably lacks a backlight, requiring a clip-on light for use in dimly lit environments.

The display itself, while sharp for its size at 220 pixels per inch (480 x 800 pixels resolution), won't match the crispness of premium eReaders with 300 ppi displays. However, the Xteink X4's small form factor remains its key selling point, making it easy to carry everywhere.

Powered by an ESP32 microcontroller with a 650 mAh battery promising up to two weeks of battery life, the device also includes a 32GB microSD card for storage, USB Type-C port, and support for WiFi and Bluetooth.

For users who aren't ready to commit to a complete firmware replacement, the Xteink community has developed various third-party apps and tools. These include options for managing the device from an Android phone, using Calibre to batch process EPUB files optimized for the X4, converting eBooks into X4-friendly images that preserve formatting, and converting manga or comics to compatible formats.

The emergence of CrossPoint Reader highlights an interesting trend in the eReader market - even budget devices can benefit from community-driven software improvements. As more users seek customization and enhanced functionality from their reading devices, open source firmware projects like this could become increasingly common, particularly for devices with capable hardware but limited software.

For Xteink X4 owners looking to get more from their device, CrossPoint Reader represents a compelling option that transforms a basic eReader into a more capable and customizable reading tool without requiring hardware upgrades.