Scan not working on HCI > 5.x

[mbrunnen]

System

Software

• Operating System: Debian GNU/Linux 11 (bullseye)
• Python Version: 3.9.2
• gattlib Version: 0.20201113

Hardware

hci0:   Type: Primary  Bus: USB
        UP RUNNING
        RX bytes:337531 acl:0 sco:0 events:13225 errors:0
        TX bytes:828464 acl:0 sco:0 commands:7186 errors:0
        Features: 0xbf 0xfe 0x0f 0xfe 0xdb 0xff 0x7b 0x87
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH SNIFF
        Link mode: SLAVE ACCEPT
        Class: 0x3c010c
        Service Classes: Rendering, Capturing, Object Transfer, Audio
        Device Class: Computer, Laptop
        HCI Version: 5.2 (0xb)  Revision: 0x2279
        LMP Version: 5.2 (0xb)  Subversion: 0x2279
        Manufacturer: Intel Corp. (2)

Issue

I am using the example code as root:

#!/usr/bin/env python3
"""Tool for interfacing the sensor with Bluetooth Low Energy"""

from gattlib import DiscoveryService


service = DiscoveryService("hci0")
devices = service.discover(2)

for address, name in devices.items():
    print("name: {}, address: {}".format(name, address))

but I get this error:

Traceback (most recent call last):
  File "example.py", line 7, in <module>
    devices = service.discover(2)
RuntimeError: Set scan parameters failed (are you root?)

When I plugin a Bluetooth Dongle with HCI version 4.x it works fine.

[shaobo-zhang-senscomm]

@mbrunnen is there a workaroud for this ?

[mbrunnen]

Unfortunately not. I am using https://github.com/LeBlue/pydbus-bluez, which uses the dbus service of BlueZ and I am also directly using the dbus message bus org.bluez within python.

[mbrunnen]

You could also take an old enough bluetooth dongle :shrug:

[shaobo-zhang-senscomm]

Thanks