Show HN: Open-Source eInk Bike Computer
Summary
OpenTrailPaper provides open-source firmware for the LilyGO T5S3 4.7\" E-Paper PRO to display ride data, offline maps, and GPX routes; it records .FIT files and connects to Bluetooth sensors. It can run without a phone once maps and routes are loaded, with the iOS app used for setup and data transfer. The project is hardware-focused and invites community contributions for new boards and improvements.