# lux-lat-long-log: reconstructing LUMIX S5 BLE GPS communication

> lux-lat-long-log reconstructs the Panasonic LUMIX S5 Bluetooth LE GPS exchange in an ESP32 camera client. The project documents GATT identifiers, session ordering and GPS/time packets from Android HCI captures, then uses a GNSS module to send positions without the phone app.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-06
- Original resource: <https://github.com/tobiasbrummer/lux-lat-long-log>
- Primary source: <https://github.com/tobiasbrummer/lux-lat-long-log/blob/87e51686c8496ca20fa8b14433ba548383f8da5b/README.md>
- Catalog page: <https://awesomerea.org/resources/lux-lat-long-log-case/>
- Record JSON: <https://awesomerea.org/resources/lux-lat-long-log-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/lux-lat-long-log-case/index.md)

## Requirements & limits

- **Prerequisites:** Requires an ESP32 and SIM868 GNSS module for the documented hardware build.
- **Scope:** Builds with PlatformIO; the documented camera implementation targets the LUMIX S5.
- **Testing evidence:** The author reports successful hardware and photo EXIF checks for the S5.
- **License:** MIT licence.

## Primary sources

1. <https://github.com/tobiasbrummer/lux-lat-long-log/blob/87e51686c8496ca20fa8b14433ba548383f8da5b/README.md>
2. <https://github.com/tobiasbrummer/lux-lat-long-log/blob/87e51686c8496ca20fa8b14433ba548383f8da5b/PROTOCOL.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.