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Blacklisted phrase (1): I&#039;m having the same problem
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I'm having the same problem with Bleak and the Pi 5 Bluetooth stack, opened an issue on GitHub. Devices appear in btmon and bluetoothctl but not Bleak.

What does work for me is explicitly scanning in passive mode like this:

from bleak.backends.bluezdbus.scanner import BlueZScannerArgs
from bleak.backends.bluezdbus.advertisement_monitor import OrPattern
from bleak.assigned_numbers import AdvertisementDataType

PASSIVE_SCANNER_ARGS = BlueZScannerArgs(
    or_patterns=[
        OrPattern(0, AdvertisementDataType.FLAGS, b"\x06"),
        OrPattern(0, AdvertisementDataType.FLAGS, b"\x1a"),
    ]
)

devices = await BleakScanner.discover(
    return_adv=True,
    scanning_mode="passive",
    bluez=PASSIVE_SCANNER_ARGS
)

This requires Experimental = true in /etc/bluetooth/main.conf. Those or_patterns should actually accept all devices, they're required for passive mode.

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