#!/bin/bash
#
#instalar o firmware-realtek
#ou rtl8812au-dkms rtl8821ce-dkms
#
#se compilar instalar o bc build-essential git
#
#instalar o usb-modeswitch
#
#ls usb 
# -v <vendedor> -p <produto>
usb_modeswitch -KW -v 0bda -p 1a2b

In my case the solution was:
put in /etc/rc.local
#!/bin/bash
#
bluetoothctl power on
#
#followed by
#
rfkill unblock all
#
or
#
$ cat /etc/systemd/system/rfkill-unblock.service 
[Unit]
Description=RFKill-Unblock All Devices

[Service]
Type=oneshot
ExecStart=/usr/sbin/rfkill unblock all
ExecStop=
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

 added

After=bluetooth.service
Requires=bluetooth.service