# FT9201 Linux: reconstructing fingerprint-reader USB capture

> FT9201 Linux documents the USB exchanges needed to poll finger presence and capture a 64×80 grayscale frame from a FocalTech FT9201 reader. A C libusb proof of concept follows the recorded control-transfer and bulk-IN sequence and writes raw and PGM images.

- 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/vitasnay-droid/ft9201-linux>
- Primary source: <https://github.com/vitasnay-droid/ft9201-linux/blob/8154d876b1a828a4766c39bc4df13cf3b0f2b6cd/docs/protocol.md>
- Catalog page: <https://awesomerea.org/resources/ft9201-linux-case/>
- Record JSON: <https://awesomerea.org/resources/ft9201-linux-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/ft9201-linux-case/index.md)

## Requirements & limits

- **Prerequisites:** Requires a FocalTech FT9201 reader with VID:PID 2808:9338, Linux and libusb 1.0.
- **Limits:** The implementation is a userspace proof of concept; libfprint, PAM and kernel-driver integration are absent.
- **License:** MIT License.

## Primary sources

1. <https://github.com/vitasnay-droid/ft9201-linux/blob/8154d876b1a828a4766c39bc4df13cf3b0f2b6cd/docs/protocol.md>
2. <https://github.com/vitasnay-droid/ft9201-linux/blob/8154d876b1a828a4766c39bc4df13cf3b0f2b6cd/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.