Bluetooth not working

Hello , I have a bluetooth problem
I have followed the bluetooth setup on
It is a clean debian install.
I get the following output .
there is no output for hciconfig

If anyone has an idea to what the problem might be it will be very appreciated.

What are the hardware version and system image of your ROCK Pi S?

i am using the latest rock pi s with 8gb of flash
and the latest debian image from the radxa website

i tried getting the version

apt install lsb-release


I think you can try these steps.

Firstly, make sure there is a wifi chip on ROCK Pi S.

‘ifconfig’ would show p2p0 and wlan0 interfaces.

Secondly, manually setup bt.

echo 0 > /sys/class/rfkill/rfkill0/state
echo 1 > /sys/class/rfkill/rfkill0/state
version=`uname -r`
insmod /lib/modules/${version}/kernel/drivers/bluetooth/hci_uart.ko
rtk_hciattach -n -s 115200 /dev/ttyS4 rtk_h5 &
hciconfig hci0 up

Regarding the rtk_hciattach utility, I can’t see it in buildroot.
Is this the original repo ?

The wifi side of the bluetooth chip seems to be working :
# ifconfig -a | grep wlan0
wlan0 Link encap:Ethernet HWaddr 00:E0:4C:8F:7C:A3

I have compiled in to the Linux kernel the following :

Then I execute the rtk_hciattach … but it doesn’t seem to work … any pointers ?

# rtk_hciattach -n -s 115200 /dev/ttyS4 rtk_h5
Realtek Bluetooth init uart with init speed:115200, final_speed:115200, type:HCI UART H5
Realtek Bluetooth :Realtek hciattach version 3.1 

Realtek Bluetooth :3-wire sync pattern resend : 1, len: 8

Realtek Bluetooth :3-wire sync pattern resend : 2, len: 8

Realtek Bluetooth :3-wire sync pattern resend : 3, len: 8

I started a new thread for the bluetooth problem I’m seeing : Bluetooth and rtk_hciattach