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Build and Test Documentation Status Black

Bleak is an acronym for Bluetooth Low Energy platform Agnostic Klient.

Bleak is a GATT client software, capable of connecting to BLE devices acting as GATT servers. It is designed to provide a asynchronous, cross-platform Python API to connect and communicate with e.g. sensors.


  • Supports Windows 10, version 16299 (Fall Creators Update) or greater

  • Supports Linux distributions with BlueZ >= 5.43 (See Linux backend for more details)

  • OS X/macOS support via Core Bluetooth API, from at least OS X version 10.11

Bleak supports reading, writing and getting notifications from GATT servers, as well as a function for discovering BLE devices.


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