# BtCarKey: reconstructing a BLE car-key box client

> BtCarKey implements an Android client for a keyless car box using a reconstructed FTK BLE interface. Its protocol notes map advertising data, GATT UUIDs, a 16-byte frame header, checksums, challenge authentication and car control commands. The client uses those messages to pair with and operate the box.

- 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/simoneluconi/BtCarKey>
- Primary source: <https://github.com/simoneluconi/BtCarKey/blob/ac6c08300aa37f6a9cb9c1cd677af17338ef1e2f/PROTOCOL.md>
- Catalog page: <https://awesomerea.org/resources/btcarkey-case/>
- Record JSON: <https://awesomerea.org/resources/btcarkey-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/btcarkey-case/index.md)

## Requirements & limits

- **Prerequisites:** Android 10 or later and a compatible BLE keyless car box are required.
- **Prerequisites:** Smart unlock requires Android 12 or later.
- **License:** GPL-3.0 license.

## Primary sources

1. <https://github.com/simoneluconi/BtCarKey/blob/ac6c08300aa37f6a9cb9c1cd677af17338ef1e2f/PROTOCOL.md>
2. <https://github.com/simoneluconi/BtCarKey/blob/ac6c08300aa37f6a9cb9c1cd677af17338ef1e2f/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.