Adapter parameter ignored on BleakClient

[bmoore27]

• bleak version: 0.9.1
• Python version: 3.7.3
• Operating System: Debian 10.4
• BlueZ version (bluetoothctl -v) in case of Linux: 5.50

Description

Setting the adapter parameter seems to be ignored by BleakClient.

What I Did

In my python script I am probing some GATT characteristics and I am trying to use the second BT adapter (hci1).

Running hciconfig I can see both adapters are enabled:

 $ hciconfighci 
hci1:   Type: Primary  Bus: USB
        BD Address: 34:C9:F0:89:73:4D  ACL MTU: 1021:8  SCO MTU: 64:1
        UP RUNNING
        RX bytes:50925 acl:46 sco:0 events:1829 errors:0
        TX bytes:6246 acl:36 sco:0 commands:549 errors:0

hci0:   Type: Primary  Bus: UART
        BD Address: DC:A6:32:6B:88:2E  ACL MTU: 1021:8  SCO MTU: 64:1
        UP RUNNING
        RX bytes:23070479 acl:13168 sco:0 events:579837 errors:0
        TX bytes:66202 acl:1868 sco:0 commands:2470 errors:0

In my python script, I initate the BleakClient like so:

async with BleakClient(address_or_ble_device=address, adapter="hci1") as client:

After the script runs I rerun the hciconfig command and I see that the TX/RX has only increased for hic0, see below:

 hciconfig
hci1:   Type: Primary  Bus: USB
        BD Address: 34:C9:F0:89:73:4D  ACL MTU: 1021:8  SCO MTU: 64:1
        UP RUNNING
        RX bytes:50925 acl:46 sco:0 events:1829 errors:0
        TX bytes:6246 acl:36 sco:0 commands:549 errors:0

hci0:   Type: Primary  Bus: UART
        BD Address: DC:A6:32:6B:88:2E  ACL MTU: 1021:8  SCO MTU: 64:1
        UP RUNNING
        RX bytes:23072805 acl:13213 sco:0 events:579873 errors:0
        TX bytes:66561 acl:1886 sco:0 commands:2481 errors:0

[rhyst]

Also encountered this. Seems to be because the connect method uses the static find_device_by_address method which does not take the adapter as an argument.

You might be able to work around this by doing the scan yourself:

scanner = BleakScanner()
devices = await scanner.discover(device=adapter_name)
found = None
for device in devices:
    if (device.address == mac_address):
        found = device
        if not found:
            print('not found')
            os._exit(1)
client = BleakClient(found, device=adapter_name)

You can initialise BleakScanner with the device kwarg but this is also seems to be ignored when you run scanner.discover.

[hbldh]

This does indeed seem to be a bug. It should be a small thing to fix, will try to look at it during the weekend.