Rowlink

A web app for the Yosuda rowing machine (YOSUDA-RM-*): live dashboard, guided workouts with knob prompts, history and FIT/TCX/CSV export. It talks to the rower directly over Web Bluetooth, so there's nothing to install: open it in Chrome or Edge on Android, Windows, macOS, ChromeOS or Linux.

It replaces the FED Fitness app (no account, no trackers) and fixes the jumpy numbers other apps show: the rower's own instantaneous pace and power swing 2× from stroke to stroke, so the app works them out from the rower's distance and stroke counters instead.

App	web/: plain HTML/JS, no build step (details)
Design notes	PLAN.md: protocol findings, data pipeline, decisions
Recordings	captures/: raw Bluetooth sessions from the real rower, used by the tests and the Replay feature

Run it locally

python3 web/serve.py

Then open http://localhost:8080/web/ in Chrome. On Linux, Web Bluetooth may need chrome://flags/#enable-web-bluetooth.

Tests

cd web && npm install && npm test

Not supported

iOS (no Web Bluetooth in any iOS browser), Firefox and Safari.