uno-r4-wifi-ableton-link
Firmware that turns an Arduino UNO R4 WiFi into a 48 PPQN Eurorack clock generator synchronized to Ableton Link via WiFi multicast.
- 48 PPQN clock output — 5V logic on D2 with 2ms pulse width
- Selectable PPQN — 1, 2, 4, 8, 12, 24, or 48 PPQN via potentiometer on A0
- RUN gate — D4 goes HIGH when Link transport is playing
- LED matrix BPM display — 3-digit readout with 50ms beat flash
- Phase-aligned — Uses Link beat anchor for jitter-free tempo changes
- Follow-only — Reads tempo/phase without influencing the session
- Auto fallback — Freerunning 120 BPM clock before Link connection; walking-dot disconnect indicator
Find the project and more detailed documentation on GitHub: