# ETEKCITY Smart Nutrition Scale: mapping the ESN00 BLE packets

> ETEKCITY Smart Nutrition Scale research maps the ESN00 scale’s Bluetooth Low Energy characteristics and packet payloads. A TypeScript package parses and serializes identified commands and measurements for units, tare, automatic shutoff and scale state; the documentation lists packet types still under investigation.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-07
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/hertzg/metekcity>
- Primary source: <https://github.com/hertzg/metekcity/blob/e971276e8cc7ab8d606ec6471d205c389d27224f/packages/esn00-packet/README.md>
- Catalog page: <https://awesomerea.org/resources/metekcity-case/>
- Record JSON: <https://awesomerea.org/resources/metekcity-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/metekcity-case/index.md)

## Requirements & limits

- **Scope:** An ETEKCITY ESN00 scale is the documented protocol target.
- **Limits:** Several packet types, including SET_NUTRITION, remain unresearched.
- **License:** MIT License.

## Primary sources

1. <https://github.com/hertzg/metekcity/blob/e971276e8cc7ab8d606ec6471d205c389d27224f/packages/esn00-packet/README.md>
2. <https://github.com/hertzg/metekcity/blob/e971276e8cc7ab8d606ec6471d205c389d27224f/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.