# FIIL headphones: reconstructing Bluetooth control commands

> The FIIL headphone study reconstructs Bluetooth control framing and command behavior from FIIL+ 3.5.2 analysis and headset captures. Its documents cover GAIA, Mate and Doubao command spaces, SPP and BLE GATT transport, connection handshakes and response parsing.

- Type: Case study
- Targets: App · 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/FNKG9527/fiil-headphone-protocol>
- Primary source: <https://github.com/FNKG9527/fiil-headphone-protocol/blob/bd862b1c92d77b5caf5fffe4612794b3305aa14a/README.md>
- Catalog page: <https://awesomerea.org/resources/fiil-headphone-protocol-case/>
- Record JSON: <https://awesomerea.org/resources/fiil-headphone-protocol-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/fiil-headphone-protocol-case/index.md)

## Requirements & limits

- **Scope:** Hardware observations cover one FIIL Key Max headset with firmware 3.0.1.1.
- **Limits:** Other models, custom EQ writes, Doubao voice payloads and OTA are outside the device tests.
- **License:** CC BY-SA 4.0 license.

## Primary sources

1. <https://github.com/FNKG9527/fiil-headphone-protocol/blob/bd862b1c92d77b5caf5fffe4612794b3305aa14a/README.md>
2. <https://github.com/FNKG9527/fiil-headphone-protocol/blob/bd862b1c92d77b5caf5fffe4612794b3305aa14a/docs/PROTOCOL_PC.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.