hcitool scan说没有这样的设备

使用Raspberry Pi 3，Linux测试4.4.9-v7 +＃884 SMP Fri May 6 17:28:59 BST 2016 armv7l GNU / Linux

root@raspberry:/home/user# hcitool scan
Device is not available: No such device

这可能是什么问题？

我已更新到最新

#sudo rpi-update

我已经安装了rpi-bluetooth

#sudo apt-get install rpi-bluetooth

这可以从dmesg中看到：

root@raspberry:/home/user# dmesg | grep Blue
[   43.442353] Bluetooth: Core ver 2.21
[   43.442453] Bluetooth: HCI device and connection manager initialized
[   43.442477] Bluetooth: HCI socket layer initialized
[   43.442494] Bluetooth: L2CAP socket layer initialized
[   43.442528] Bluetooth: SCO socket layer initialized
[   73.520196] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   73.520215] Bluetooth: BNEP filters: protocol multicast
[   73.520238] Bluetooth: BNEP socket layer initialized

编辑：

这也可能很有趣，为什么蓝牙不在这里？

root@raspberry:/home/user# rfkill list
0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

编辑2： 我试图重新安装pi-bluetooth

user@raspberry:~ $ sudo apt-get purge bluez-firmware
[sudo] password for user: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be REMOVED:
  bluez-firmware* pi-bluetooth*
0 upgraded, 0 newly installed, 2 to remove and 0 not upgraded.
After this operation, 240 kB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 47373 files and directories currently installed.)
Removing pi-bluetooth (0.1.0) ...
Purging configuration files for pi-bluetooth (0.1.0) ...
Removing bluez-firmware (1.2-3+rpi1) ...

user@raspberry:~ $ sudo apt-get install pi-bluetooth
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  bluez-firmware
The following NEW packages will be installed:
  bluez-firmware pi-bluetooth
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/92.8 kB of archives.
After this operation, 240 kB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Selecting previously unselected package bluez-firmware.
(Reading database ... 47354 files and directories currently installed.)
Preparing to unpack .../bluez-firmware_1.2-3+rpi1_all.deb ...
Unpacking bluez-firmware (1.2-3+rpi1) ...
Selecting previously unselected package pi-bluetooth.
Preparing to unpack .../pi-bluetooth_0.1.0_armhf.deb ...
Unpacking pi-bluetooth (0.1.0) ...
Setting up bluez-firmware (1.2-3+rpi1) ...
Setting up pi-bluetooth (0.1.0) ...
Job for hciuart.service failed. See 'systemctl status hciuart.service' and 'journalctl -xn' for details.

我怀疑最后一个错误与它有关： hciuart.service的作业失败。有关详细信息，请参见“ systemctl status hciuart.service”和“ journalctl -xn”。

user@raspberry:~ $ sudo journalctl -xn
-- Logs begin at Sun 2016-05-08 19:48:33 CEST, end at Sun 2016-05-08 19:58:07 CEST. --
May 08 19:52:46 raspberry systemd[1]: Failed to start Configure Bluetooth Modems connected by UART.
-- Subject: Unit hciuart.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit hciuart.service has failed.
-- 
-- The result is failed.
May 08 19:52:46 raspberry systemd[1]: Unit hciuart.service entered failed state.
May 08 19:52:46 raspberry hciattach[1279]: Can't initialize device: Success
May 08 19:52:46 raspberry hciattach[1279]: bcm43xx_init


user@raspberry:~ $ systemctl status hciuart.service
● hciuart.service - Configure Bluetooth Modems connected by UART
   Loaded: loaded (/lib/systemd/system/hciuart.service; enabled)
   Active: failed (Result: exit-code) since Sun 2016-05-08 19:52:46 CEST; 6min ago
  Process: 1279 ExecStart=/usr/bin/hciattach /dev/ttyAMA0 bcm43xx 921600 noflow - (code=exited, status=1/FAILURE)
user@raspberry:~ $ 

我遇到过同样的问题

pi@jarvis:~ $ hcitool dev
Devices:

与非活动 hciuart.service

pi@jarvis:~ $ systemctl status hciuart.service
● hciuart.service - Configure Bluetooth Modems connected by UART
   Loaded: loaded (/lib/systemd/system/hciuart.service; enabled)
   Active: inactive (dead)

之后

pi@jarvis:~ $ sudo systemctl start hciuart.service

我有

pi@jarvis:~ $ systemctl status hciuart.service
● hciuart.service - Configure Bluetooth Modems connected by UART
   Loaded: loaded (/lib/systemd/system/hciuart.service; enabled)
   Active: active (running) since Sat 2017-05-20 17:42:40 CEST; 2s ago

和

pi@jarvis:~ $ hcitool dev
Devices:
    hci0    B8:27:EB:E5:7C:B0

检查文件/boot/config.txt中是否有类似条目

dtoverlay=pi3-disable-bt 

并通过在行首添加＃来确保注释掉该行。如果未注释掉，则此行将断开蓝牙与UART的连接，而将UART与GPIO引脚连接。希望这对你有用！

不要使用BerryBoot，并尝试sudo apt-get update和sudo apt-get upgrade。或者，您可以raspbian从官方网站重新安装最新版本。