What is pala-one-firmware?

PaulLagier/pala-one-firmware is the C++ firmware source code for Pala One, a small DIY E-Ink reading device created by Paul Lagier. E-Ink (electronic ink) is the same low-power display technology used in dedicated e-readers: it only consumes power when the screen changes, making it ideal for battery-powered reading devices. The stated goal is a simple, distraction-free reading device that feels minimal, portable, and easy to build while looking more like a finished product than a typical electronics hobby project. The device is built around a module called the Heltec Wireless Paper (versions V1.1 and V1.2 are both supported), housed in a 3D-printed case and powered by a LiPo battery with USB-C charging. Features listed in the README include TXT book support, adjustable font size, adjustable line spacing, deep sleep mode to save power, and reading progress saving. The firmware is compiled using Arduino IDE from a single source file. Beyond the core firmware, the project supports small add-on programs called Apps, which are compiled as separate binary files and uploaded to the device over WiFi, no re-flashing required. The device creates its own WiFi network called PALA-XXXXXX, and apps are uploaded via a browser at a local web address. Apps are written in C and call into the firmware through a function table called the PalaAPI (currently version 3), which provides functions for drawing to the screen, reading button input, timing, and simple file storage. Each compiled app must be under 48 KB. The repository contains only the firmware source. Physical design files such as STL files, assembly guides, and 3D printable files are available separately via Ko-fi.