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bluetoothctl工具问题

使用bluetoothctl,并使用scan on扫描设备时,只能扫描到几个设备(附近蓝牙设备有10几个),有时候还一个扫描不到,然后就报错,拨错信息如下:

Bluetooth: hci0: failed to disable LE scan: status 0x1f
Bluetooth: hci0: command 0x200c tx timeout

内核版本4.19,bluez版本5.50,使用的beagleboneblack板。