# OsmoFresh Quella Pro: hardware and UART protocol investigation

> An OsmoFresh Quella Pro investigation records reconstructed PCB schematics, identified components and a UART communication model for the water dispenser. The protocol notes distinguish main-to-display responses from display-to-main AA frames and give a SUM16 calculation, while leaving several payload meanings unresolved.

- 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/LostCacher/osmofresh-quellapro-reverse-engineering>
- Primary source: <https://github.com/LostCacher/osmofresh-quellapro-reverse-engineering/blob/6a51b2b78510f373babc239a6f95fc8e19f90ea3/Documentation/UART_Protocol_Model.md>
- Catalog page: <https://awesomerea.org/resources/osmofresh-quella-pro-hardware-case/>
- Record JSON: <https://awesomerea.org/resources/osmofresh-quella-pro-hardware-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/osmofresh-quella-pro-hardware-case/index.md)

## Requirements & limits

- **Limits:** The published schematics may contain errors or incomplete sections.
- **Limits:** UART payload state discrimination and several field meanings remain unknown.
- **License:** MIT license.

## Primary sources

1. <https://github.com/LostCacher/osmofresh-quellapro-reverse-engineering/blob/6a51b2b78510f373babc239a6f95fc8e19f90ea3/Documentation/UART_Protocol_Model.md>
2. <https://github.com/LostCacher/osmofresh-quellapro-reverse-engineering/blob/6a51b2b78510f373babc239a6f95fc8e19f90ea3/README.md>
3. <https://github.com/LostCacher/osmofresh-quellapro-reverse-engineering/blob/6a51b2b78510f373babc239a6f95fc8e19f90ea3/Documentation/Componens.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.