Skip to content


Repository files navigation


Bleak Logo
Build and Test PyPI - Downloads Documentation Status

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.


$ pip install bleak


  • Supports Windows 10, version 16299 (Fall Creators Update) or greater
  • Supports Linux distributions with BlueZ >= 5.43
  • OS X/macOS support via Core Bluetooth API, from at least OS X version 10.11
  • Android backend compatible with python-for-android

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


To discover Bluetooth devices that can be connected to:

import asyncio
from bleak import BleakScanner

async def main():
    devices = await
    for d in devices:

Connect to a Bluetooth device and read its model number:

import asyncio
from bleak import BleakClient

address = "24:71:89:cc:09:05"

async def main(address):
    async with BleakClient(address) as client:
        model_number = await client.read_gatt_char(MODEL_NBR_UUID)
        print("Model Number: {0}".format("".join(map(chr, model_number))))

DO NOT NAME YOUR SCRIPT! It will cause a circular import error.

See examples folder for more code, for instance example code for connecting to a TI SensorTag CC2650