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Python GATT Module

Project description

pygatt - Python Module for Bluetooth LE Generic Attribute Profile (GATT).
====

This Module allows reading and writing to GATT descriptors on devices such as
fitness trackers, sensors, and anything implementing standard GATT Descriptor behavior.

pygatt wraps BlueZ's `gatttool` command-line utility with a Pythonic API.


Motivation
----

`gatttool` has an interactive mode but it is difficult to use programatically.
Ideally we could use BlueZ directly, but that's a much bigger task.


Dependencies
----
* Currently only tested under Linux as it requires `gatttool` which is included with BlueZ which is a Linux library.
* BlueZ >= 5.5
* Tested on 5.18 and 5.21
* Ubuntu is stuck on BlueZ 4.x and does not work - you need to build BlueZ
from source.


Installation
----
* Install via pip: `$ pip install pygatt`


Usage Example
----
Connect to a bGeigie Nano using BLEBee and decode sensor data (NMEA-like):

.. code:: python

import pygatt

str_buf = ''
def print_str_buf(x,y):
global str_buf
str_y = "%s" % y
if str_y == '$':
print str_buf
sb = str_y
else:
str_buf = str_buf + str_y

pygatt.util.reset_bluetooth_controller()
bgn = pygatt.pygatt.BluetoothLEDevice('00:07:80:71:D5:89')
bgn.connect()
bgn.char_write(32, bytearray([0x03, 0x00]))
bgn.subscribe('a1e8f5b1-696b-4e4c-87c6-69dfe0b0093b', print_str_buf)
bgn.run()

This should print something like:

.. parsed-literal::

$BNRDD,2359,2014-12-14T09:46:47Z,32,2,2398,A,3745.6045,N,12229.8638,W,50.40,A,8,87*5B


Author
----
Greg Albrecht <gba@orionlabs.co> https://github.com/ampledata

Derived from the work of several others, see NOTICE.


License
----
Apache License, Version 2.0. See LICENSE.


Copyright
----
Copyright 2015 Orion Labs


Source
----
https://github.com/ampledata/pygatt

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