The raspbian kernel version 4.14.52+ #1123. It hasn't driver to use it.
I use command.
$ dmesg
I found. Raspbian can detect bluetooth device but it isn't have firmware. (rtl8723b_fw.bin)
[ 14.665558] bluetooth hci0: Direct firmware load for rtl_bt/rtl8723b_config.bin failed with error -2
[ 14.665824] bluetooth hci0: Direct firmware load for rtl_bt/rtl8723b_fw.bin failed with error -2
[ 14.665842] Bluetooth: hci0: Failed to load rtl_bt/rtl8723b_fw.bin
I use command for check usb device id.
$ lsusbI found.
Bus 001 Device 004: ID 0bda:b720 Realtek Semiconductor Corp.
The USB Device ID is 0bda:b720.
I search device id for identify device. I found RTL8723BU (not RTL8723AU).
I found driver and firmware.
WIFI Driver (Source code)
Bluetooth Firmware
Install Step
First step. Install linux kernel header package and other package for raspbian.
$ sudo apt-get install raspberrypi-kernel-headers git build-essential
Create directory for build source and download source code
$ mkdir drivers
$ cd drivers
Install RTL8723BU WIFI Driver
$ git clone https://github.com/lwfinger/rtl8723bu.git
$ cd rtl8723bu
Disable Concurrent Mode
$ sed -i "s/^EXTRA_CFLAGS += -DCONFIG_CONCURRENT_MODE/#EXTRA_CFLAGS += -DCONFIG_CONCURRENT_MODE/g" Makefile
Build and Install
$ make
$ sudo make install
Disable power save
$ echo "options 8723bu rtw_power_mgnt=0 rtw_enusbss=0" | sudo tee /etc/modprobe.d/8723bu.conf
Install RTL8723B Bluetooth Driver
$ git clone https://github.com/lwfinger/rtl8723au_bt.git
$ cd rtl8723au_bt/Linux_BT_USB_2.11.20140423_8723BE/8723B
$ sudo cp rtl8723b_config /lib/firmware/rtl_bt/rtl8723b_config.bin
$ sudo cp rtl8723b_fw /lib/firmware/rtl_bt/rtl8723b_fw.bin
And restart raspberry pi
Test bluetooth scan with command.
$ hcitool scan
Scanning ...
XX:XX:XX:XX:XX:XX xxxxxx
XX:XX:XX:XX:XX:XX xxxxxx
It work.
And check WIFI interface with command.
$ ifconfig
It work. I found wlan0 interface.
wlan0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether xx:xx:xx:xx:xx:xx txqueuelen 1000 (Ethernet)
RX packets 17 bytes 0 (0.0 B)
RX errors 0 dropped 80 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
And try to config wpa_supplicant-wlan0.conf for wlan0 interface
$ echo -e "ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev\nupdate_config=1\ncountry=TH\n\n" | sudo tee /etc/wpa_supplicant/wpa_supplicant-wlan0.confAdd SSID and Password of Accesspoint to wpa_supplicant config file
$ wpa_passphrase test 12345678 | sudo tee -a /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
And restart raspbian. Finish step.
Have a good day everyone. 😎
Reference:
WIFI Driver (Source code)
Bluetooth Firmware
Realtek RTL8723BU
