aioblescan 0.2.9

Scanning Bluetooth for advertised info with asyncio.

aioblescan

aioblescan is a Python 3/asyncio library to listen for BLE advertized packets.

Installation

We are on PyPi so

pip3 install aioblescan

or

python3 -m pip install aioblescan

How to use

Essentially, you create a function to process the incoming information and you attach it to the BTScanRequester. You then create a Bluetooth connection, you issue the scan command and wait for incoming packets and process them.

You can use Eddystone or RuuviWeather to retrieve specific information

The easiest way is to look at the __main__.py file.

You can run the module with

python3 -m aioblescan

Add -h for help.

To see the RuuviTag weather information try:

python3 -m aioblescan -r

You will get

Weather info {'rssi': -64, 'pressure': 100300, 'temperature': 24, 'mac address': 'fb:86:84:dd:aa:bb', 'tx_power': -7, 'humidity': 36.0}
Weather info {'rssi': -62, 'pressure': 100300, 'temperature': 24, 'mac address': 'fb:86:84:dd:aa:bb', 'tx_power': -7, 'humidity': 36.0}

To check Eddystone beacon

python3 -m aioblescan -e

You get

Google Beacon {'tx_power': -7, 'url': 'https://ruu.vi/#BEgYAMR8n', 'mac address': 'fb:86:84:dd:aa:bb', 'rssi': -52}
Google Beacon {'tx_power': -7, 'url': 'https://ruu.vi/#BEgYAMR8n', 'mac address': 'fb:86:84:dd:aa:bb', 'rssi': -53}

To check ATC_MiThermometer with [custom firmware](https://github.com/atc1441/ATC_MiThermometer) beacon

python3 -m aioblescan -A

You get

Temperature info {'mac address': 'a4:c1:38:40:52:38', 'temperature': 2.8, 'humidity': 62, 'battery': 72, 'battery_volts': 2.863, 'counter': 103, 'rssi': -76}
Temperature info {'mac address': 'a4:c1:38:40:52:38', 'temperature': 2.8, 'humidity': 62, 'battery': 72, 'battery_volts': 2.863, 'counter': 103, 'rssi': -77}

For a generic advertise packet scanning

python3 -m aioblescan

You get

HCI Event:
    code:
        3e
    length:
        19
    LE Meta:
        code:
            02
        Adv Report:
            num reports:
                1
            ev type:
                generic adv
            addr type:
                public
            peer:
                54:6c:0e:aa:bb:cc
            length:
                7
            flags:
                Simul LE - BR/EDR (Host): False
                Simul LE - BR/EDR (Control.): False
                BR/EDR Not Supported: False
                LE General Disc.: True
                LE Limited Disc.: False
            Incomplete uuids:
                    ff:30
            rssi:
                -67
HCI Event:
    code:
        3e
    length:
        43
    LE Meta:
        code:
            02
        Adv Report:
            num reports:
                1
            ev type:
                no connection adv
            addr type:
                random
            peer:
                fb:86:84:dd:aa:bb
            length:
                31
            flags:
                Simul LE - BR/EDR (Host): False
                Simul LE - BR/EDR (Control.): False
                BR/EDR Not Supported: False
                LE General Disc.: True
                LE Limited Disc.: True
            Complete uuids:
                    fe:aa
            Advertised Data:
                Service Data uuid:
                    fe:aa
                Adv Payload:
                    10:f9:03:72:75:75:2e:76:69:2f:23:42:45:77:59:41:4d:52:38:6e
            rssi:
                -59

Here the first packet is from a Wynd device, the second from a Ruuvi Tag

aioblescan can also send EddyStone advertising. Try the -a flag when running the module.

FAQ

Why not use scapy?

Scapy is great and you can do

import scapy.all as sa
test=sa.BluetoothHCISocket(0)
command=sa.HCI_Cmd_LE_Set_Scan_Enable(enable=1,filter_dups=0)
chdr=sa.HCI_Command_Hdr(len=len(command))
hdr=sa.HCI_Hdr(type=1)
test.send(hdr / chdr / command)

to get things going. But… the great thing with Scapy is that there is so many versions to choose from…. and not all have all the same functions … and installation can be haphazard, with some version not installing at all. Also scapy includes a lot of other protocols and could be an overkill… lastly it is never too late to learn…

What can you track?

aioblescan will try to parse all the incoming advertised information. You can see the raw data when it does not know what to do. With Eddystone beacon you can see the URL, Telemetry and UID