Hi there,
please try below commands. thanks.
udebian@beaglebone:~$ uname -a
Linux beaglebone 4.14.71-ti-r80 #1 SMP PREEMPT Fri Oct 5 23:50:11 UTC 2018 armv7l GNU/Linux
debian@beaglebone:~$ bluetoothctl --agent
[NEW] Controller A4:D5:78:6D:6F:E0 beaglebone [default]
Agent registered
[bluetooth]# scan on
Discovery started
[CHG] Controller A4:D5:78:6D:6F:E0 Discovering: yes
[NEW] Device C0:72:BC:0A:E6:1E HB7910703602
[NEW] Device E8:19:C4:6B:03:5C YONGNUO LED
[NEW] Device C0:F6:1E:02:0A:1E HB7690138998
[NEW] Device CC:51:96:72:10:EB mobike
[NEW] Device F7:56:B8:CF:BA:3D mobike
[NEW] Device CB:98:4C:07:38:4F mobike
[NEW] Device C0:FA:E3:00:F0:0A HB2800058362
[NEW] Device C0:DF:71:08:E6:1E HB7910553439
[NEW] Device 3C:A3:08:06:00:03 3C-A3-08-06-00-03
[NEW] Device 59:29:36:75:62:61 NokeLock
[NEW] Device E0:06:E6:BB:97:53 X1-THINK
[NEW] Device 7B:77:21:7C:62:61 NokeLock
[CHG] Device E8:19:C4:6B:03:5C RSSI: -100
[CHG] Device E8:19:C4:6B:03:5C RSSI: -89
[CHG] Device E8:19:C4:6B:03:5C RSSI: -81
[CHG] Device E8:19:C4:6B:03:5C RSSI: -93
[CHG] Device E8:19:C4:6B:03:5C RSSI: -81
[CHG] Device 80:35:C1:25:72:38 RSSI: -59
[CHG] Device E0:06:E6:BB:97:53 RSSI: -88
[CHG] Device E0:06:E6:BB:97:53 RSSI: -78
[CHG] Device E8:19:C4:6B:03:5C RSSI: -90
[NEW] Device C8:70:22:3E:1C:F0 mobike