# Clockwise Calipers Data Interface: reconstructing the DTCR-02 cable

> Clockwise Calipers Data Interface reconstructs the DTCR-02 data cable for Clockwise Tools DCLR-XX05 calipers. An Arduino reads the caliper's synchronous 24-bit measurements and presents them as USB keyboard input; the repository includes packet notes, firmware, KiCad designs and case models.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-08
- Original resource: <https://github.com/dthomas1202/clockwise-calipers-data-interface>
- Primary source: <https://github.com/dthomas1202/clockwise-calipers-data-interface/blob/7ac10a2165699b952a6ad3b0f7e47b437e61a958/README.md>
- Catalog page: <https://awesomerea.org/resources/clockwise-calipers-data-interface-case/>
- Record JSON: <https://awesomerea.org/resources/clockwise-calipers-data-interface-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/clockwise-calipers-data-interface-case/index.md)

## Requirements & limits

- **Prerequisites:** Clockwise Tools DCLR-XX05 calipers and an Arduino capable of USB keyboard emulation are needed; native USB support or an alternative such as HoodLoader2 can provide that capability.
- **Limits:** The caliper data pins operate at 1.5 V and the README limits total current draw from them to about 0.3 mA.
- **Testing evidence:** Android device compatibility is described as untested.
- **License:** GPL-3.0 license.

## Primary sources

1. <https://github.com/dthomas1202/clockwise-calipers-data-interface/blob/7ac10a2165699b952a6ad3b0f7e47b437e61a958/README.md>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.