Mitutoyo 52‑bit Digimatic → Arduino

Canonical, workshop‑ready reference for reading Mitutoyo SPC (Digimatic) 52‑bit frames on Arduino.

Folder Layout

• src/ — Arduino sketches
• docs/ — Guides and one‑pagers
  • diagrams/ — PNG diagrams used in the docs
• examples/ — Sample raw frames/dumps

Quick Start

1. Wire SPC via level shifting (CLK→D2 INT0, DATA→D4, REQ→D3 optional, GND→GND).
2. Open src/Mitutoyo_52bit_Reader.ino in Arduino IDE and upload to UNO/Nano.
3. Serial Monitor @ 115200: view raw nibbles and decoded value.

Docs

• docs/Mitutoyo_52bit_Complete_Guide_v2.pdf — story, protocol, diagrams, worked example, full code.
• docs/Mitutoyo_Arduino_Pinout_OnePager.pdf — wiring cheat‑sheet.

Links

• Original instructable with wiring and components
• Interface Board Available-

License

MIT © 2025 Steve Spence