https://github.com/hertzg/metekcity

ETEKCITY smart nutrition scale protocol reverse engneering
https://github.com/hertzg/metekcity

ble etekcity node protocol reverse-engineering

Last synced: 8 days ago
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ETEKCITY smart nutrition scale protocol reverse engneering

• Host: GitHub
• URL: https://github.com/hertzg/metekcity
• Owner: hertzg
• License: mit
• Created: 2020-09-04T02:19:38.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2022-02-17T05:44:26.000Z (over 2 years ago)
• Last Synced: 2024-10-12T02:06:38.517Z (24 days ago)
• Topics: ble, etekcity, node, protocol, reverse-engineering
• Language: TypeScript
• Homepage:
• Size: 3.27 MB
• Stars: 16
• Watchers: 3
• Forks: 8
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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# ETEKCITY Smart Nutrition Scale

:warning: Very much work in progress :warning:

This is a potential project that tries to reverse engineer the BLE protocol that ETEKCITY Smart Nutrition Scale (ESN00)

uses.

[ETEKCITY Smart Nutrition Scale (ESN00)](https://www.etekcity.com/product/100334) ([DE](https://www.amazon.de/gp/product/B07RJV9QPF)

| [US](https://www.amazon.com/Etekcity-ESN00-Nutrition-Counting-Bluetooth/dp/B07FCZSC41))

![](https://image.etekcity.com/thumb/201810/28/7f248c75a139b66b9d0e6b081c25a0a1.jpg)

## BLE Protocol

This section describes the protocol (what was researched so far)

### BLE Services & Characteristics

```text

> Service: 00001910-0000-1000-8000-00805f9b34fb

>> Characteristic: 00002c10-0000-1000-8000-00805f9b34fb [READ]

>> Characteristic: 00002c11-0000-1000-8000-00805f9b34fb [WRITEWITHOUTRESPONSE, WRITE]

>> Characteristic: 00002c12-0000-1000-8000-00805f9b34fb [NOTIFY, INDICATE]

> Service: 0000180a-0000-1000-8000-00805f9b34fb

>> Characteristic: 00002a23-0000-1000-8000-00805f9b34fb [READ]

>> Characteristic: 00002a50-0000-1000-8000-00805f9b34fb [READ]

> Service: 00001800-0000-1000-8000-00805f9b34fb

>> Characteristic: 00002a00-0000-1000-8000-00805f9b34fb [READ]

>> Characteristic: 00002a01-0000-1000-8000-00805f9b34fb [READ]

```

Communication happens on service `0x1910`, device to client communication happens on `0x2c12` characteristic and client

to device communication on `0x2c12`

## Protocol

All packets have this structure

### Packet

![](https://kroki.io/packetdiag/svg/eNorSEzOTi1JyUxMV6jmUlAw0DW2UvBITUxJLbJWQAL6-grO-XnFJYl5JVYKBhVpqalpyQaJRkAdJlYKIZUFqQrRRfkliSWptkbmBrHWEB0BYLPB0kCFplYKPql56SUZaEqBCl0SSxKBkkA5oDotCDc6JzXP1jTWGtkJIAmwCmcPbwwLIY7MSE3OLi7N5arlAgALMjve)

#### Structure: Data

[Payload structure is defined in esn00-packet README](packages/esn00-packet/README.md)