# SP542E MQTT ↔ BLE bridge: local control through the controller protocol

> An MQTT-to-BLE bridge that controls the SP542E LED controller from Home Assistant using BanlanX_6xx commands. Its protocol notes identify service FFE0, write characteristic FFE1, plaintext 53-prefixed frames and acknowledged writes for power, white color temperature and brightness.

- 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/xydac/sp542e-ha-bridge>
- Primary source: <https://github.com/xydac/sp542e-ha-bridge/blob/6723ee3488a8216c2ca5699b96f6d84543164673/README.md>
- Catalog page: <https://awesomerea.org/resources/sp542e-ha-bridge-case/>
- Record JSON: <https://awesomerea.org/resources/sp542e-ha-bridge-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/sp542e-ha-bridge-case/index.md)

## Requirements & limits

- **Prerequisites:** An always-on Mac with a local GUI session, Bluetooth permission and BLE access to the SP542E.
- **Prerequisites:** Home Assistant with MQTT and credentials configured for the bridge.
- **Limits:** The bridge keeps optimistic local state; changes made through the original app or remote are not reflected.
- **License:** MIT License.

## Primary sources

1. <https://github.com/xydac/sp542e-ha-bridge/blob/6723ee3488a8216c2ca5699b96f6d84543164673/README.md>
2. <https://github.com/xydac/sp542e-ha-bridge/blob/6723ee3488a8216c2ca5699b96f6d84543164673/LICENSE>

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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.