# Bose-Reverse-Engineering: investigating the 321GS Series III SmartSpeaker link

> Bose-Reverse-Engineering investigates the SmartSpeaker link between a Bose 321GS Series III console and bass module. The author documents connector pinouts, probes a 4800-baud half-duplex UART exchange, and provides Arduino firmware and KiCad hardware for a replacement console.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-08
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/Kenneract/Bose-Reverse-Engineering>
- Primary source: <https://github.com/Kenneract/Bose-Reverse-Engineering/blob/76774ccb968d5112b80b992acf5888130be5ba35/SmartSpeakerProtocol.md>
- Catalog page: <https://awesomerea.org/resources/bose-321gs-smartspeaker-case/>
- Record JSON: <https://awesomerea.org/resources/bose-321gs-smartspeaker-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/bose-321gs-smartspeaker-case/index.md)

## Requirements & limits

- **Prerequisites:** Bose 321GS Series III hardware is the investigated system.
- **Limits:** The investigation stopped after a functioning audio system was restored; some protocol questions remain unanswered.
- **License:** GPL-3.0.

## Primary sources

1. <https://github.com/Kenneract/Bose-Reverse-Engineering/blob/76774ccb968d5112b80b992acf5888130be5ba35/SmartSpeakerProtocol.md>
2. <https://github.com/Kenneract/Bose-Reverse-Engineering/blob/76774ccb968d5112b80b992acf5888130be5ba35/README.md>
3. <https://github.com/Kenneract/Bose-Reverse-Engineering/blob/76774ccb968d5112b80b992acf5888130be5ba35/ReplacementUnit/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.