How to enable Bluetooth? (RPi Zero 2 W ASL 3 appliance)

AllStarLink
1

Setup Information

OS : Debian GNU/Linux 12 (bookworm)
OS Kernel : 6.12.34+rpt-rpi-v8
Asterisk : 22.4.1+asl3-3.5.4-1.deb12
ASL [app_rpt] : 3.5.4

Inquiry

I have been unable to get Bluetooth working on two AllStarLink 3 appliances built on Raspberry Pi Zero 2 W boards. This appears to be by design (see https://allstarlink.github.io/basics/incompatibles/#pi-serial-ports-available-by-default).

I want to use a BT keyboard with my ASL node because all of my physical ports are in use. Is there a way to enable BT in this configuration?

Thanks,

Tom KJ7T

2

If you look at the end of the /boot/firmware/config.txt you will see :

dtoverlay=disable-bt

That line was added to make life simpler for those with a Raspberry Pi's with an installed PiHat that also needs access to the serial port. You "may" be able to remove (or comment out) that line.

3

That worked. At the end of the /boot/firmware/config.txt file, I commented out that one line and rebooted.

[all]
# dtoverlay=disable-bt
enable_uart=1

After that, from the CLI, issuing sudo bluetoothctl worked. Then agent on and default-agent, and finally scan on to find available BT devices.

When the correct device was found, type pair XX:XX:XX:XX:XX:XX where the XX's are the device address shown in the scan results. Once you pair the device, then you issue connect XX:XX:XX:XX:XX:XX to make the BT connection.

Note that the keyboard does not work in the Cockpit web interface. I have a separate 7" monitor connected to the RPi Zero 2 W's miniHDMI port. That is the screen that responds to the BT keyboard. Also, I note that the BT connection does not persist after rebooting. Something to keep in mind.

4

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