# Mondeer Bluetooth scale: reconstructing BLE weighing and binding

> Mondeer Bluetooth scale reconstructs the BLE exchange used by Mondeer and WanKa C1 bathroom scales and implements a Python listener that publishes weighing data to Home Assistant over MQTT. The documented work combines decompilation of the original Android app with traffic observation; a separate Android companion app displays readings and exports to Health Connect.

- 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/MicheleMercuri/mondeer-bluetooth-scale-ha>
- Primary source: <https://github.com/MicheleMercuri/mondeer-bluetooth-scale-ha/blob/0f11b823bcfe657a60c7f063f8aa85b7e7b65ebc/README.md>
- Catalog page: <https://awesomerea.org/resources/mondeer-bluetooth-scale-ha-case/>
- Record JSON: <https://awesomerea.org/resources/mondeer-bluetooth-scale-ha-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/mondeer-bluetooth-scale-ha-case/index.md)

## Requirements & limits

- **Prerequisites:** Python 3.10+, a BLE 4.0+ adapter, the scale, and Home Assistant with MQTT are required for the listener workflow.
- **Testing evidence:** The author reports daily use on Windows 11; Linux and BlueZ have had less testing.
- **License:** MIT license.

## Primary sources

1. <https://github.com/MicheleMercuri/mondeer-bluetooth-scale-ha/blob/0f11b823bcfe657a60c7f063f8aa85b7e7b65ebc/README.md>
2. <https://github.com/MicheleMercuri/mondeer-bluetooth-scale-ha/blob/0f11b823bcfe657a60c7f063f8aa85b7e7b65ebc/docs/PROTOCOL.md>
3. <https://github.com/MicheleMercuri/mondeer-bluetooth-scale-ha/blob/0f11b823bcfe657a60c7f063f8aa85b7e7b65ebc/docs/REVERSE_ENGINEERING.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.