Bluetooth 藍芽配對連接

Debug 在置底。

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說明：筆者使用於筆電之內建藍芽與藍芽機械式鍵盤進行配對 。

*** 規格 ***
系統： Debian Jessie 8.0
核心：3.16.7
筆電：Acer v3-772g
鍵盤：ZIPPY BW7050
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查看無線驅動：

lspci -k|grep -iA2 Network

0d:00.0 Network controller: Qualcomm Atheros AR9462 Wireless Network Adapter (rev 01)
Subsystem: Foxconn International, Inc. Device e052
Kernel driver in use: ath9k

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檢查驅動：

lsmod |grep ath9k
lsmod |grep bluetooth

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安裝 bluetooth 套件：

apt-get update
apt-get install bluetooth bluez
apt-get upgrade -y

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啟動服務：

systemctl enable bluetooth.service
systemctl start bluetooth.service
systemctl status bluetooth.service

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設定檔：vi /etc/default/bluetooth

# Defaults for bluez-utils

# This file supersedes /etc/default/bluez-pan. If
# that exists on your system, you should use this
# file instead and remove the old one. Until you
# do so, the contents of this file will be ignored.

# start bluetooth on boot?
# compatibility note: If this variable is not found bluetooth will
# start
BLUETOOTH_ENABLED=1

# This setting will switch HID devices (e.g mouse/keyboad) to HCI mode, that is
# you will have bluetooth functionality from your dongle instead of only HID.
# Note that not every bluetooth dongle is capable of switching back to HID
# mode, see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=355497
HID2HCI_ENABLED=1
HID2HCI_UNDO=1

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常用指令：

hciconfig: 顯示本機藍芽裝置
hciconfig -a: 顯示本機藍芽裝置詳細資訊
hciconfig hci0 up/down: 啟用 / 關閉第一個藍芽裝置 ( hci0 )
hcitool dev: 顯示本機所有藍芽裝置address
hcitool scan: 搜尋周邊欄芽裝置

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無線裝置軟/硬體開關 (blocked:no 為裝置開啟)：

sudo rfkill list

0: acer-wireless: Wireless LAN
Soft blocked: yes
Hard blocked: no
1: acer-bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
2: phy0: Wireless LAN
Soft blocked: yes
Hard blocked: yes
3: hci0: Bluetooth
Soft blocked: no
Hard blocked: no

sudo rfkill block all -----------> 關閉全部無線裝置
rfkill unblock bluetooth--------> 只開啟 bluetooth

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使用 bluetoothctl 指令配對連線：

bluetoothctl -----------> 進入 bleutoothctl 指令模式 exit 或 quit 可離開

以下為 [bluetooth]# 下的指令：

help
version
power on -------------> 開啟藍芽
list --------------------> 查看本機 Bluetooth
discoverable off -------> 筆電藍芽不開放給別人看到
pairable off ------------> 筆電藍芽不開放給別人配對
scan on ----------------> 開啟掃描，此時會抓到我的鍵盤 BT address
[NEW] Device AB:CD:EF:00:11:22 我的鍵盤 BT Address

開始連線 ( [bluetooth]# 下)：

info AB:CD:EF:00:11:22 -----> 查看鍵盤藍芽裝置
pair AB:CD:EF:00:11:22 -----> 配對
trust AB:CD:EF:00:11:22 -----> 加到信任
unblock AB:CD:EF:00:11:22 -> 不阻擋
connect AB:CD:EF:00:11:22 -> 連線

此時沒意外話，可以連上鍵盤了。
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Debug

善用幾個指令 debug 看系統訊息，方便至 google 爬文。

dmesg | grep -i bluetooth
sudo grep bluetooth /var/log/syslog
systemctl status bluetooth

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Debug1

核心驅動問題

cd /usr/src/linux
make menuconfig

進入 -*- Networking support  ---> <M>   Bluetooth subsystem support  --->

--- Bluetooth subsystem support
  │ │    [ ]   Bluetooth 6LoWPAN support
  │ │       RFCOMM protocol support
  │ │    [*]     RFCOMM TTY support
  │ │       BNEP protocol support
  │ │    [*]     Multicast filter support
  │ │    [*]     Protocol filter support
  │ │       CMTP protocol support
  │ │       HIDP protocol support
  │ │          Bluetooth device drivers  --->

進入 -*- Networking support  ---> <M>   Bluetooth subsystem support  ---> Bluetooth device drivers  -->

 HCI USB driver 
  │ │     HCI SDIO driver
  │ │     HCI UART driver
  │ │    [*]   UART (H4) protocol support
  │ │    [*]   BCSP protocol support
  │ │    [*]   Atheros AR300x serial support
  │ │    [*]   HCILL protocol support
  │ │    [*]   Three-wire UART (H5) protocol support
  │ │     HCI BCM203x USB driver
  │ │     HCI BPA10x USB driver
  │ │     HCI BlueFRITZ! USB driver
  │ │     HCI DTL1 (PC Card) driver
  │ │     HCI BT3C (PC Card) driver
  │ │     HCI BlueCard (PC Card) driver
  │ │     HCI UART (PC Card) device driver
  │ │     HCI VHCI (Virtual HCI device) driver
  │ │     Marvell Bluetooth driver support
  │ │       Marvell BT-over-SDIO driver
  │ │     Atheros firmware download driver

save ---> exit

time make-kpkg --initrd --revision=$version kernel_image -j $CORE
dpkg -i linux-image-$version_amd64.deb
reboot

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其他驅動問題，參考 http://ubuntuforums.org/showthread.php?t=2251009

至 http://drvbp1.linux-foundation.org/~mcgrof/rel-html/backports/ 下載對應核心之 backport 檔，接著做：

cd Desktop/backports-3.18-rc1-1
make defconfig-ath9k
make
sudo make install
sudo reboot

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Debut 2

hciconfig ------> 無輸出

hcitool dev ----> 無裝置

hcitool scan ---> 無輸出

查看無線 WiFi/Bluetooth 卡是不是 Atheros 的？
lspci -k |grep -i network

參考 http://unix.stackexchange.com/questions/146097/bluetooth-device-not-working-debian-wheezy
可以試試安裝

apt-get install firmware-atheros

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Debug 3

因本人在編譯其他軔體時，不小心誤將 Bluetooth 的其中一個 firmware 刪除或覆蓋，因此在開機的時候，就顯示如下圖：

使用以下指令也可以看到此錯誤訊息：

dmesg | grep -i bluetooth