After an update (probably due to deconz), no Bluetooth adapter was found when booting the Raspi.
This results in the following error status message:
openhabian@openhabianpi:~ $ sudo systemctl status hciuart.service
[sudo] Passwort für openhabian:
● 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 2023-10-08 16:45:12 CEST; 3min 41s ago
Process: 388 ExecStart=/usr/bin/btuart (code=exited, status=1/FAILURE)
CPU: 226msOkt 08 16:45:03 openhabianpi systemd[1]: Starting Configure Bluetooth Modems connected by UART…
Okt 08 16:45:12 openhabianpi btuart[444]: Failed to update baudrate, invalid HCI event
Okt 08 16:45:12 openhabianpi btuart[444]: Can’t initialize device: No such file or directory
Okt 08 16:45:12 openhabianpi btuart[444]: bcm43xx_init
Okt 08 16:45:12 openhabianpi btuart[444]: Flash firmware /lib/firmware/brcm/BCM4345C0.hcd
Okt 08 16:45:12 openhabianpi btuart[444]: Set Controller UART speed to 3000000 bit/s
Okt 08 16:45:12 openhabianpi systemd[1]: hciuart.service: Control process exited, code=exited, status=1/FAILURE
Okt 08 16:45:12 openhabianpi systemd[1]: hciuart.service: Failed with result ‘exit-code’.
Okt 08 16:45:12 openhabianpi systemd[1]: Failed to start Configure Bluetooth Modems connected by UART.
and this error in the openhab.log:
2023-10-08 16:47:51.922 [ERROR] [com.github.hypfvieh.DbusHelper ] - Critical error while reading DBUS response (maybe no bluetoothd daemon running?)
org.freedesktop.dbus.exceptions.DBusExecutionException: Failed to activate service ‘org.bluez’: timed out (service_start_timeout=25000ms).
The solution found in other forums is to edit, add and save /boot/config.txt like this:
sudo nano /boot/config.txt
…
enable_uart=1
dtoverlay=pi3-miniuart-bt-overlay