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I have built an yocto poky image with bitbake and it doesn't seem to recognise the bluetooth device/controller.

I have seen this issue and doesn't help.

My local.conf has extra for distro features

DISTRO_FEATURES_append += " systemd bluez5 bluetooth wifi"
VIRTUAL-RUNTIME_init_manager = "systemd"

My image file also IMAGE_INSTALL s

pi-bluetooth \
bluez5 \

I have also made sure the config.txt does not apply the 

   dtoverlay=pi3-disable-bt

I can successfully systemctl start bluetooth and it starts running. When I check status its active running.

But if I check hciconfig or bluetoothctl it shows no devices or controller available.

I have also killed rfkill unblock bluetooth

I must be missing something. Any ideas on how to get the device recognised ?

zhjh
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2 Answers2

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The issue ended up being around the mis-configuration of the image resulting with incorrect setup serial port connecting to the bluetooth device.

Roughly,

I has IMAGE_INSTALL as

bluez5
udev-rules-rpi

I used local.conf as

DISTRO_FEATURES_append = " systemd"
VIRTUAL-RUNTIME_init_manager = "systemd"
VIRTUAL-RUNTIME_initscripts = ""

Make sure "sysvinit" is not defined to run elsewhere.

If trying to debug make sure systemctl hciuart serivce is running rather then focusing on systemctl bluetooth service. The hciuart service is required to register the device first.

There was nothing wrong with install of Bluez; so I wouldn't touch that. It should install 5.5 with latest kernel...

Current version used..

LINUX_VERSION = "4.19.69"

RPIFW_DATE = "20190830"

zhjh
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0

Yes, BlueZ is not well documented and drivers don't seem to catch up raspbian version changes.

One thing you might try is to update to BlueZ 5.5

What is the status of `bluez`, and where is the man page?

.END

tlfong01
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  • Good thought; but its running Version 5.5 already. – zhjh Sep 08 '19 at 03:48
  • @zhjh, Ah yes, sorry to forget saying that it is Revision Date: 26 July 2019, with update on Rpi4B https://3pl46c46ctx02p7rzdsvsg21-wpengine.netdna-ssl.com/wp-content/uploads/2019/03/1908_Tutorial-How-to-set-up-BlueZ__UpdateLFC_FINAL.pdf. I suspect the old kernels are problematic. This update tells how to compile an updated kernel. – tlfong01 Sep 08 '19 at 03:54