我正在运行纳米型Neo Air Board上的BuildRoot生成的Linux图像（内核4.11.2），我很难连接到我的Ruwido遥控器。
当我使用hcitool扫描设备时，我可以看到它：
# hcitool lescan
LE Scan ...
<snip>
5C:F8:21:85:8E:67 ruwido
<snip>
，但我无法获得连接（它的作用就像遥控器不在这里）：
# hcitool cc 5C:F8:21:85:8E:67
Can't create connection: Input/output error
我唯一能做的就是获取有关它的一些信息：
# hcitool leinfo 5C:F8:21:85:8E:67
Requesting information ...
Handle: 64 (0x0040)
LMP Version: 4.0 (0x6) LMP Subversion: 0x140
Manufacturer: Texas Instruments Inc. (13)
Features: 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00
我也无法使用蓝牙，因为它没有检测到我的接口，即使它是初始化的，蓝牙正在运行，并且已加载模块：
# lsmod
Module Size Used by
bnep 20480 2
hci_uart 61440 1
btbcm 16384 1 hci_uart
btqca 16384 1 hci_uart
btintel 16384 1 hci_uart
bluetooth 348160 12 hci_uart,btintel,btqca,bnep,btbcm
brcmfmac 245760 0
brcmutil 16384 1 brcmfmac
sunxi_cir 16384 0
# ps -e | grep bluetooth
553 root /usr/sbin/bluetoothd
731 root grep bluetooth
# sudo hciconfig -a
hci0: Type: Primary Bus: UART
BD Address: F7:93:3E:74:CF:62 ACL MTU: 1021:8 SCO MTU: 64:1
UP RUNNING
RX bytes:12593 acl:7 sco:0 events:292 errors:0
TX bytes:2050 acl:4 sco:0 commands:155 errors:0
Features: 0xbf 0xfe 0xcf 0xfe 0xdb 0xff 0x7b 0x87
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH SNIFF
Link mode: SLAVE ACCEPT
Name: 'NanoPi-NEO-Air'
Class: 0x000000
Service Classes: Unspecified
Device Class: Miscellaneous,
HCI Version: 4.1 (0x7) Revision: 0x0
LMP Version: 4.1 (0x7) Subversion: 0x2209
Manufacturer: Broadcom Corporation (15)
# bluetoothctl
Agent registered
[bluetooth]# power on
No default controller available
我的问题是，如何将远程配对并连接到板上？无论是通过Hcitool，BluetoothCtl还是其他工具都没有关系。
更新
感谢Prabhakar Lad的评论，Bluetoothctl现在正在检测到界面，仍然存在，问题似乎已经缩小：
# rfkill unblock all
# hciconfig hci0 up
# hciconfig -a
hci0: Type: Primary Bus: UART
BD Address: AA:AA:AA:AA:AA:AA ACL MTU: 1021:8 SCO MTU: 64:1
UP RUNNING PSCAN
RX bytes:1930 acl:0 sco:0 events:101 errors:0
TX bytes:1587 acl:0 sco:0 commands:103 errors:0
Features: 0xbf 0xfe 0xcf 0xfe 0xdb 0xff 0x7b 0x87
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH SNIFF
Link mode: SLAVE ACCEPT
Name: 'BlueZ 5.47'
Class: 0x000000
Service Classes: Unspecified
Device Class: Miscellaneous,
HCI Version: 4.1 (0x7) Revision: 0x0
LMP Version: 4.1 (0x7) Subversion: 0x2209
Manufacturer: Broadcom Corporation (15)
# bluetoothctl
[NEW] Controller F7:93:3E:74:CF:62 BlueZ 5.47 [default]
[NEW] Device 5C:F8:21:85:8E:67 ruwido
Agent registered
[bluetooth]# agent on
Agent is already registered
[bluetooth]# power on
Changing power on succeeded
[bluetooth]# scan on
Discovery started
[CHG] Controller F7:93:3E:74:CF:62 Discovering: yes
<snip>
[NEW] Device 5C:F8:21:85:8E:67 ruwido
<snip>
[bluetooth]# scan off
<snip>
[CHG] Device 5C:F8:21:85:8E:67 RSSI is nil
<snip>
[CHG] Controller F7:93:3E:74:CF:62 Discovering: no
Discovery stopped
[bluetooth]# pair 5C:F8:21:85:8E:67
Attempting to pair with 5C:F8:21:85:8E:67
[CHG] Device 5C:F8:21:85:8E:67 Connected: yes
[ruwido]# [ 501.424858] Bluetooth: hci0 unexpected SMP command 0x0b from 5c:f8:21:85:8e:67
[CHG] Device 5C:F8:21:85:8E:67 Connected: no
[bluetooth]# pair 5C:F8:21:85:8E:67
Attempting to pair with 5C:F8:21:85:8E:67
Failed to pair: org.bluez.Error.ConnectionAttemptFailed
SMP错误似乎与蓝牙低能安全性有关，所以我应该使用其他工具来配对吗？
其他信息
我实际上使用BusyBox Init System与我在制造商映像中找到的蓝牙初始脚本（是nanopi-neo-air_friendlylycore-xenial_4.11.2_20171113.img）并进行了调整，以便它们可以与busybox Init一起使用（Init Init图像上的系统是SystemD/Upstart）。
所以我有两个文件：
- /etc/init.d/s35brcm_patchram_plus：patches固件（该卡使用AMPAK AP6212蓝牙/Wifi组合模块）
- /etc/init.d/s38bluetooth：启动蓝牙
我在Buildroot 2017.08.1中使用Bluez 5.47与以下选项：
BR2_PACKAGE_BLUEZ_TOOLS=y
# BR2_PACKAGE_BLUEZ_UTILS is not set
BR2_PACKAGE_BLUEZ5_UTILS=y
BR2_PACKAGE_BLUEZ5_UTILS_OBEX=y
BR2_PACKAGE_BLUEZ5_UTILS_CLIENT=y
BR2_PACKAGE_BLUEZ5_UTILS_DEPRECATED=y
# BR2_PACKAGE_BLUEZ5_UTILS_EXPERIMENTAL is not set
# BR2_PACKAGE_BLUEZ5_PLUGINS_HEALTH is not set
# BR2_PACKAGE_BLUEZ5_PLUGINS_MIDI is not set
# BR2_PACKAGE_BLUEZ5_PLUGINS_NFC is not set
# BR2_PACKAGE_BLUEZ5_PLUGINS_SAP is not set
BR2_PACKAGE_BLUEZ5_UTILS_TEST=y
# BR2_PACKAGE_BLUEZ5_UTILS_GATTTOOL is not set
您没有浏览我的完整帖子，您需要执行以下操作 完成RFKILL和服务重新启动后的步骤：
a] bluetoothctl
Start the tool, this should detect the controller
b] [bluetooth]# agent on
Turn on the pairing agent
c] [bluetooth]# scan on
Let bluez detect your device, look in my post it should print you baddr (5C:F8:21:85:8E:67)
d] [bluetooth]# scan off
Turn off scanning once your device is discovered
e] [蓝牙]＃配对5C：F8：21：85：8E：67
Now pair to the device
现在应该配对。注意：在Bluez扫描Bluez之前，您不能配对设备。