# irca-ble-protocol: reconstructing heater control over Bluetooth LE

> irca-ble-protocol documents the Bluetooth LE control protocol observed on an Olle POWER-family towel rail. It describes GATT characteristics, 20-byte command frames, status fields and authentication behavior, and provides Python, Home Assistant and Android implementations.

- 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/niklas-a/irca-ble-protocol>
- Primary source: <https://github.com/niklas-a/irca-ble-protocol/blob/2711be69a3fa8ec99891351f46b36ac0c71d1b66/docs/OLLE_BLE_PROTOCOL.md>
- Catalog page: <https://awesomerea.org/resources/irca-ble-protocol-case/>
- Record JSON: <https://awesomerea.org/resources/irca-ble-protocol-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/irca-ble-protocol-case/index.md)

## Requirements & limits

- **Prerequisites:** A compatible heater and Bluetooth LE access; Home Assistant use requires HA 2024.8 or newer.
- **Testing evidence:** The author reports hardware checks against one Olle POWER-family unit; the Home Assistant integration and Celsius climate path were not exercised against a real heater.
- **License:** MIT license.

## Primary sources

1. <https://github.com/niklas-a/irca-ble-protocol/blob/2711be69a3fa8ec99891351f46b36ac0c71d1b66/docs/OLLE_BLE_PROTOCOL.md>
2. <https://github.com/niklas-a/irca-ble-protocol/blob/2711be69a3fa8ec99891351f46b36ac0c71d1b66/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.