Scan Bluetooth LE for advertised Eddystone URLs

eddystone_scan.py

# Reads Bluteooth LE Eddystone beacon URL from Microbit
# https://github.com/frawau/aioblescan/blob/master/aioblescan/__main__.py#L27
# enable bluetooth without sudo https://www.raspberrypi.org/forums/viewtopic.php?t=108581
import asyncio

import aioblescan as aiobs

from datetime import datetime
from aioblescan.plugins import EddyStone


def my_process(data):
    ev = aiobs.HCI_Event()
    xx = ev.decode(data)

    # filter by specific MAC address
    mac = ev.retrieve("peer")
    goon = False
    for x in mac:
        if x.val == '00:00:00:00:00:00': # replace with your micro:bit's MAC address
            goon = True
            break
    if not goon:
        return

    # decode beacon data as Eddystone
    xx = EddyStone().decode(ev)
    if xx:
        # parse the url and get the last 3 parts split by '/'
        print("{} - {}".format(datetime.utcnow().isoformat(), xx['url'].split('/')[:-3])) 
        # 2020-09-04T22:06:47.161415 - ['878', '254', '248']

event_loop = asyncio.get_event_loop()

# First create and configure a raw socket
# device hci0
mysocket = aiobs.create_bt_socket(0)

# create a connection with the raw socket
fac = event_loop._create_connection_transport(mysocket, aiobs.BLEScanRequester, None, None)

# Start it
conn, btctrl = event_loop.run_until_complete(fac)

# Attach your processing
btctrl.process = my_process

# Probe
btctrl.send_scan_request()
try:
    event_loop.run_forever()
except KeyboardInterrupt:
    print('keyboard interrupt')
finally:
    print('closing event loop')
    btctrl.stop_scan_request()
    command = aiobs.HCI_Cmd_LE_Advertise(enable=False)
    btctrl.send_command(command)
    conn.close()
    event_loop.close()

requirements.txt

aioblescan--0.2.6
asyncio==3.4.3