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A Python library for working with various types of Bluetooth LE Beacons.

Project description

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A Python library for working with various types of Bluetooth LE Beacons.

Currently supported types are:

The BeaconTools library has two main components:

  • a parser to extract information from raw binary beacon advertisements
  • a scanner which scans for Bluetoth LE advertisements using bluez and can be configured to look only for specific beacons or packet types

Installation

If you only want to use the parser install the library using pip and you’re good to go:

pip install beacontools

If you want to perfom beacon scanning there are a few more requirements. First of all, you need a supported OS: currently that’s Linux with BlueZ, and FreeBSD. Second, you need raw socket access (via Linux capabilities, or by running as root).

A typical Linux installation would look like this:

# install libbluetooth headers and libpcap2
sudo apt-get install python-dev libbluetooth-dev libcap2-bin
# grant the python executable permission to access raw socket data
sudo setcap 'cap_net_raw,cap_net_admin+eip' $(readlink -f $(which python))
# install beacontools with scanning support
pip install beacontools[scan]

Usage

See the examples directory for more usage examples.

Parser

from beacontools import parse_packet

tlm_packet = b"\x02\x01\x06\x03\x03\xaa\xfe\x11\x16\xaa\xfe\x20\x00\x0b\x18\x13\x00\x00\x00" \
             b"\x14\x67\x00\x00\x2a\xc4\xe4"
tlm_frame = parse_packet(tlm_packet)
print("Voltage: %d mV" % tlm_frame.voltage)
print("Temperature: %d °C" % tlm_frame.temperature)
print("Advertising count: %d" % tlm_frame.advertising_count)
print("Seconds since boot: %d" % tlm_frame.seconds_since_boot)

Scanner

import time

from beacontools import BeaconScanner, EddystoneTLMFrame, EddystoneFilter

def callback(bt_addr, rssi, packet, additional_info):
    print("<%s, %d> %s %s" % (bt_addr, rssi, packet, additional_info))

# scan for all TLM frames of beacons in the namespace "12345678901234678901"
scanner = BeaconScanner(callback,
    # remove the following line to see packets from all beacons
    device_filter=EddystoneFilter(namespace="12345678901234678901"),
    packet_filter=EddystoneTLMFrame
)
scanner.start()
time.sleep(10)
scanner.stop()
import time
from beacontools import BeaconScanner, IBeaconFilter

def callback(bt_addr, rssi, packet, additional_info):
    print("<%s, %d> %s %s" % (bt_addr, rssi, packet, additional_info))

# scan for all iBeacon advertisements from beacons with the specified uuid
scanner = BeaconScanner(callback,
    device_filter=IBeaconFilter(uuid="e5b9e3a6-27e2-4c36-a257-7698da5fc140")
)
scanner.start()
time.sleep(5)
scanner.stop()

# scan for all iBeacon advertisements regardless from which beacon
scanner = BeaconScanner(callback,
    packet_filter=IBeaconAdvertisement
)
scanner.start()
time.sleep(5)
scanner.stop()

Customizing Scanning Parameters

Some Bluetooth dongle don’t allow scanning in Randomized MAC mode. If you don’t receive any scan results, try setting the scan mode to PUBLIC:

from beacontools import BeaconScanner, BluetoothAddressType

scanner = BeaconScanner(
    callback,
    scan_parameters={"address_type": BluetoothAddressType.PUBLIC}
)

For all available options see Monitor.set_scan_parameters.

Changelog

Beacontools follows the semantic versioning scheme.

  • 2.0.0
    • Dropped support for Python 2.7 and 3.4
    • Added support for COVID-19 Exposure Notifications
    • Added support for FreeBSD and fixed temperature parsing (thanks to myfreeweb)
    • Added support for Control-J Monitor beacons (thanks to clydebarrow)
    • Added support for Estimote Nearables (thanks to ShaunPlummer)
  • 1.3.1
    • Multiple fixes and internal refactorings, including support for Raspberry Pi 3B+ (huge thanks to cereal)
    • Updated dependencies
  • 1.3.0
    • Added support for Estimote Telemetry packets (see examples/parser_example.py)
    • Relaxed parsing constraints for RFU and flags field
    • Added temperature output in 8.8 fixed point decimal format for Eddystone TLM
  • 1.2.4
    • Added support for Eddystone packets with Flags Data set to 0x1a (thanks to AndreasTornes)
    • Updated dependencies
  • 1.2.3
    • Fixed compatibility with construct >=2.9.41
  • 1.2.2
    • Moved import of bluez so that the library can be used in parsing-only mode, without having bluez installed.
  • 1.2.1
    • Updated dependencies
  • 1.2.0
    • Added support for Cypress iBeacons which transmit temp and humidity embedded in the minor value (thanks to darkskiez)
    • Updated dependencies
  • 1.1.0
    • Added support for Eddystone EID frames (thanks to miek)
    • Updated dependencies
  • 1.0.1
    • Implemented a small tweak which reduces the CPU usage.
  • 1.0.0
    • Implemented iBeacon support
    • Added rssi to callback function.
  • 0.1.2
    • Initial release

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