# manifold-558s-ble: reconstructing testo 558s measurement messages

> manifold-558s-ble reconstructs the testo 558s refrigeration manifold's Bluetooth LE message format from observed traffic between the device and its phone app. Its Python client subscribes to live pressure and temperature measurements, while companion scripts inspect GATT services and decode Android Bluetooth captures.

- 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/damtro/manifold-558s-ble>
- Primary source: <https://github.com/damtro/manifold-558s-ble/blob/78be99c56212c14e49bfcc287c19678a6147770e/README.md>
- Catalog page: <https://awesomerea.org/resources/manifold-558s-ble-case/>
- Record JSON: <https://awesomerea.org/resources/manifold-558s-ble-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/manifold-558s-ble-case/index.md)

## Requirements & limits

- **Prerequisites:** A testo 558s, Python with bleak and a Bluetooth LE connection are required for live readings; Windows pairing is required before connecting.
- **Testing evidence:** The author reports testing one 558s on Windows 10 only; pressure units remain unconfirmed under pressure.
- **License:** MIT license.

## Primary sources

1. <https://github.com/damtro/manifold-558s-ble/blob/78be99c56212c14e49bfcc287c19678a6147770e/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.