gistfile1.txt

sudo btattach -P bcm --speed 115200 -B /dev/ttyACM0
Attaching Primary controller to /dev/ttyACM0
Switched line discipline from 0 to 15
Device index 1 attached

[ 1334.338855] Bluetooth: hci1: BCM: chip id 144
[ 1334.340953] Bluetooth: hci1: BCM: features 0x0e
[ 1334.363807] Bluetooth: hci1: Find Me Target
[ 1334.363818] Bluetooth: hci1: BCM (001.003.005) build 0000
[ 1334.374913] Bluetooth: hci1: BCM: firmware Patch file not found, tried:
[ 1334.374920] Bluetooth: hci1: BCM: 'brcm/BCM.hcd'
[ 1334.497963] Bluetooth: MGMT ver 1.22

tcpdump -i bluetooth-monitor