# PetKit Eversweet Max 2 UVC: reconstructing fountain BLE telemetry

> PetKit Eversweet Max 2 UVC BLE Gateway uses a local Python or ESP32-C3 client in place of the Wi-Fi PetKit device that relays the fountain’s data. It reads state and drinking history and sends Telegram alerts. Its protocol notes document BLE framing, authentication, a 42-byte state map and history flow control derived from device observations.

- 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/sakirsek/petkit-eversweet-ble-gateway>
- Primary source: <https://github.com/sakirsek/petkit-eversweet-ble-gateway/blob/7e9b0ea0839a8a26f31de55d01273f75fa69ba2a/docs/protocol.md>
- Catalog page: <https://awesomerea.org/resources/petkit-eversweet-ble-gateway-case/>
- Record JSON: <https://awesomerea.org/resources/petkit-eversweet-ble-gateway-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/petkit-eversweet-ble-gateway-case/index.md)

## Requirements & limits

- **Prerequisites:** PetKit Eversweet Max 2 UVC CTW3UV and its six-byte authentication secret.
- **Prerequisites:** An Android phone with the PetKit app and adb to obtain the secret by the documented method.
- **Limits:** Only one fountain of the named model was tested.
- **License:** MIT license.

## Primary sources

1. <https://github.com/sakirsek/petkit-eversweet-ble-gateway/blob/7e9b0ea0839a8a26f31de55d01273f75fa69ba2a/docs/protocol.md>
2. <https://github.com/sakirsek/petkit-eversweet-ble-gateway/blob/7e9b0ea0839a8a26f31de55d01273f75fa69ba2a/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.