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sudo systemctl disable blueman-mechanism.service
sudo systemctl disable bluetooth-mesh.service
root@raspberrypi:~# systemctl list-unit-files | grep blue
bluealsa.service static -
blueman-mechanism.service enabled enabled
bluetooth.service enabled enabled
dbus-org.bluez.service alias -
bluetooth.target static -
root@raspberrypi:~# systemctl status hciuart
● hciuart.service - Configure Bluetooth Modems connected by UART
Loaded: loaded (/lib/systemd/system/hciuart.service; enabled; vendor preset: enabled)
Active: active (running) since Sun 2022-03-27 05:53:41 CST; 6h ago
Process: 330 ExecStart=/usr/bin/btuart (code=exited, status=0/SUCCESS)
Main PID: 407 (hciattach)
Tasks: 1 (limit: 2200)
Memory: 904.0K
CPU: 77ms
CGroup: /system.slice/hciuart.service
└─407 /usr/bin/hciattach /dev/serial1 bcm43xx 921600 noflow - b8:27:eb:2a:96:fa
3月 27 05:53:40 raspberrypi systemd[1]: Starting Configure Bluetooth Modems connected by UART...
3月 27 05:53:41 raspberrypi btuart[370]: Cannot open directory '/etc/firmware': No such file or directory
3月 27 05:53:41 raspberrypi btuart[370]: Patch not found, continue anyway
3月 27 05:53:41 raspberrypi btuart[370]: bcm43xx_init
3月 27 05:53:41 raspberrypi btuart[370]: Set BDADDR UART: b8:27:eb:2a:96:fa
3月 27 05:53:41 raspberrypi btuart[370]: Set Controller UART speed to 921600 bit/s
3月 27 05:53:41 raspberrypi btuart[370]: Device setup complete
3月 27 05:53:41 raspberrypi systemd[1]: Started Configure Bluetooth Modems connected by UART.