Bluetooth doesn't appear after boot very often in Orange Pi 2W

[sminder]

I've got Orange Pi 2W board and installed Debian 12 Home Assistant image to it (image link). There is a huge problem with it. Very often there is no bluetooth module appeared in system. I need to reboot system for 10-15 timer to make it work. What can be a reason?

I attached 2 boot logs (with good BT appears and no BT appears), I hope it will help to find out the issue.

 

boot_log_bt_good_02.zip

boot_log_bt_bad_02.zip

[IBV]

Hi,

 

without owning this board, chatgpt is pointing out to an initialisation issue of the bluetooth system caused by the GPIO pin not being correctly handled at boot.

 [    6.024062] WCN: marlin chip en dummy pull up -- need manually set GPIO 

The correct solution would be to handle the init in the dtb file, but you can try the following systemd initialisation as a workaround to see if it works.

 

Create (as root) the following service file /etc/systemd/system/bt-gpio.service with the contents:

[Unit]
Description=Enable GPIO for Bluetooth chip
Before=bluetooth.service

[Service]
Type=oneshot
ExecStart=/bin/sh -c 'echo 225 > /sys/class/gpio/export || true; echo out > /sys/class/gpio/gpio225/direction; echo 1 > /sys/class/gpio/gpio225/value'

[Install]
WantedBy=multi-user.target

Then enable it (as root):

systemctl daemon-reexec
systemctl daemon-reload
systemctl enable bt-gpio.service

Reboot and check if the bluetooth starts correctly. Post the boot log if it does not.

 

[Michael Robinson]

Also Check your PSU if the problem is intermittent.

[sminder]

Thank you for the suggestion. Unfortunately, it didn't help. Here is a boot log after your fix:

bt_boot_fail_after_fix.txt

[IBV]

I did not see the bt-gpio service starting on boot.

Can you post the status ?

 

On 6/9/2025 at 8:28 AM, IBV said:

systemctl status bt-gpio.service