@Thomas-Braun
Hat das vielleicht was damit zu tun?
systemctl status hciuart.service
● hciuart.service - Configure Bluetooth Modems connected by UART
Loaded: loaded (/lib/systemd/system/hciuart.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Sun 2020-10-11 14:25:15 CEST; 53min ago
Process: 329 ExecStart=/usr/bin/btuart (code=exited, status=1/FAILURE)
Okt 11 14:24:35 raspberrypi systemd[1]: Starting Configure Bluetooth Modems connected by UART...
Okt 11 14:25:15 raspberrypi btuart[329]: Initialization timed out.
Okt 11 14:25:15 raspberrypi btuart[329]: bcm43xx_init
Okt 11 14:25:15 raspberrypi btuart[329]: Flash firmware /lib/firmware/brcm/BCM4345C0.hcd
Okt 11 14:25:15 raspberrypi systemd[1]: hciuart.service: Control process exited, code=exited, status=1/FAILURE
Okt 11 14:25:15 raspberrypi systemd[1]: hciuart.service: Failed with result 'exit-code'.
Okt 11 14:25:15 raspberrypi systemd[1]: Failed to start Configure Bluetooth Modems connected by UART.