使用 blueman 连接蓝牙设备

事实上，blueman 给我们提供了一个 GUI 界面来方便地让我们连接蓝牙设备。

1、查看蓝牙状态

sudo rfkill

ID TYPE      DEVICE      SOFT      HARD
 0 wlan      phy0   unblocked unblocked
 1 bluetooth hci0   unblocked unblocked

确定 bluetooth 中 SOFT 和 HARD 都是 unblocked

若不是，则执行

sudo rfkill unblock bluetooth

2、安装 blueman

sudo pacman -S blueman --noconfirm

looking for conflicting packages...

Packages (1) blueman-2.0.5-2

Total Installed Size:  5.31 MiB
Net Upgrade Size:      0.00 MiB

:: Proceed with installation? [Y/n] 
(0/1) checking keys in keyring                     [----------------------]   0%(1/1) checking keys in keyring                     [######################] 100%
(0/1) checking package integrity                   [----------------------]   0%(1/1) checking package integrity                   [######################] 100%
(0/1) loading package files                        [----------------------]   0%(1/1) loading package files                        [######################] 100%
(0/1) checking for file conflicts                  [----------------------]   0%(1/1) checking for file conflicts                  [######################] 100%
(0/1) checking available disk space                [----------------------]   0%(1/1) checking available disk space                [######################] 100%
:: Processing package changes...
(1/1) reinstalling blueman                         [----------------------]   0%(1/1) reinstalling blueman                         [#######---------------]  36%(1/1) reinstalling blueman                         [######################] 100%
:: Running post-transaction hooks...
(1/4) Compiling GSettings XML schema files...
(2/4) Updating icon theme caches...
(3/4) Arming ConditionNeedsUpdate...
(4/4) Updating the desktop file MIME type cache...

3、检查 bluetooth service 是否启动

sudo systemctl status bluetooth.service

● bluetooth.service - Bluetooth service
   Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; disabled; vendor preset: disabled)
   Active: active (running) since Sat 2018-05-19 07:57:38 CST; 19min ago
     Docs: man:bluetoothd(8)
 Main PID: 28874 (bluetoothd)
   Status: "Running"
    Tasks: 1 (limit: 4636)
   Memory: 1.8M
   CGroup: /system.slice/bluetooth.service
           └─28874 /usr/lib/bluetooth/bluetoothd

May 19 07:57:37 X61 systemd[1]: Starting Bluetooth service...
May 19 07:57:37 X61 bluetoothd[28874]: Bluetooth daemon 5.49
May 19 07:57:38 X61 systemd[1]: Started Bluetooth service.
May 19 07:57:38 X61 bluetoothd[28874]: Starting SDP server
May 19 07:57:38 X61 bluetoothd[28874]: Bluetooth management interface 1.14 …ized
Hint: Some lines were ellipsized, use -l to show in full.

若 bluetooth.service 没有启动，则启动它

sudo systemctl start bluetooth.service

4、启动 blueman

在终端执行

blueman-applet

就会发现任务栏上出现一个蓝牙的图标了

点击蓝牙图表之后选择 设备 就能搜索蓝牙设备了