Transforming the LILYGO T5 E-Paper S3 Pro into a DIY Bike Computer

The OpenTrailPaper initiative presents an innovative approach for cycling enthusiasts, transforming the LILYGO T5 E-Paper S3 Pro development kit into a versatile DIY e-paper bike computer. This project integrates firmware designed for the ESP32-S3-based device, along with companion apps available for both Android and iOS platforms, allowing users to manage maps, routes, and settings seamlessly.

Key features of this e-paper bike computer include the ability to display ride data, utilize offline maps, and adhere to standard GPX (GPS Exchange Format) routes. Additionally, it can record FIT (Flexible and Interoperable Data Transfer) files, commonly used in Garmin devices, and supports Bluetooth connectivity for heart rate, power, and cadence sensors, with plans to incorporate ANT/ANT+ compatibility in the future.

For those interested in the technical specifications, the LILYGO T5 E-Paper S3 Pro boasts a dual-core Tensilica LX7 microcontroller, 8MB of PSRAM, and a 4.7-inch e-Paper display with a resolution of 960x540 pixels, among other features. This project not only enhances the cycling experience but also encourages DIY enthusiasts to explore the potential of embedded systems in sports technology.

Source: CNX Software – Embedded Systems News (https://www.cnx-software.com/2026/09/05/opentrailpaper-transforms-lilygo-t5-e-paper-s3-pro-devkit-into-a-diy-e-paper-bike-computer/)