# Q-Hub Relay Control: reconstructing an OTAQ relay protocol

> Q-Hub Relay Control implements a browser-operated client for the OTAQ Q-Hub relay board using a protocol recovered from the vendor's Windows utility. Its documentation specifies TCP command frames, a Fletcher-style checksum, UDP discovery and status replies, including observed inaccuracies in device status fields.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/AndyMcLeod/qhub-relay-control>
- Primary source: <https://github.com/AndyMcLeod/qhub-relay-control/blob/676253fe6404485068a188f35a46c2cbb664608c/README.md>
- Catalog page: <https://awesomerea.org/resources/qhub-relay-control-case/>
- Record JSON: <https://awesomerea.org/resources/qhub-relay-control-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/qhub-relay-control-case/index.md)

## Requirements & limits

- **Prerequisites:** Provide access to an OTAQ Q-Hub relay board for device control.
- **Prerequisites:** Run from source with Python 3.9 or later.
- **Testing evidence:** The author reports that network-configuration writes have not been exercised on physical hardware.
- **License:** MIT License.

## Primary sources

1. <https://github.com/AndyMcLeod/qhub-relay-control/blob/676253fe6404485068a188f35a46c2cbb664608c/README.md>
2. <https://github.com/AndyMcLeod/qhub-relay-control/blob/676253fe6404485068a188f35a46c2cbb664608c/LICENSE>

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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.