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Openwrt 15.05 add bluez support


2 platform

cpu-bt.png

Figure 1: Bluetooth Module in my board

As shown above, bt module is connected to cpu via UART.

3 add bluez support

3.1 select necessary packages

package description
kmod-bluetooth Kernel support for Bluetooth devices
bluez-libs Bluetooth library.
bluez-utils Bluetooth utilities.
dbus Simple interprocess messaging system (daemon), dependency of bluez-utils

before make, make sure the packages have been selected in .config 

CONFIG_PACKAGE_bluez-libs=y
CONFIG_PACKAGE_bluez-utils=y
CONFIG_PACKAGE_dbus=y
CONFIG_PACKAGE_libdbus=y

3.2 compile && upgrade

After compile, do upgrade

3.3 manually test bluetooth in board

After login to the board:

  • attach serial devices via UART HCI to BlueZ stack 
hciattach -n /dev/ttyHS0 bcsp 115200 &
  • print name and basic information about all the bluetooth devices 
hciconfig

hci0:   Type: BR/EDR  Bus: UART
        BD Address: 00:02:5B:00:A5:A5  ACL MTU: 310:10  SCO MTU: 64:8
        UP RUNNING PSCAN
        RX bytes:3613 acl:0 sco:0 events:108 errors:0
        TX bytes:4382 acl:0 sco:0 commands:113 errors:0
  • activate a device 
hciconfig hci0 up
  • Display local devices 
hcitool dev
  • scan for remote devices 
hcitool scan

3.4 troubleshoot issues

If bluetooth device doesn't initialize correctly and doesn't show up while running hcitool dev command, try reinitializing bluetooth stack: 

hciconfig hci0 reset
hciconfig
hciconfig hci0 up
/etc/init.d/bluetoothd restart