系统概况：

# uname -a
Linux rockchip 4.4.143 #9 SMP PREEMPT Wed Feb 13 18:38:41 CST 2019 armv7l GNU/Linux
蓝牙芯片：AP6212

1、查看电源是否开启

# cd /sys/class/rfkill
# ls
rfkill0  rfkill1  rfkill2
# rfkill <--- 查看蓝牙对应的目录
ID TYPE      DEVICE             SOFT      HARD
 0 bluetooth bt_default      blocked unblocked
 1 wlan      phy0          unblocked unblocked
 2 wlan      brcmfmac-wifi unblocked unblocked
# cd rfkill0/
# cat state <--- 查看电源状态
0 <--- power down
# echo 1 > ./state  <--- power up
[  423.917629] [BT_RFKILL]: rfkill_rk_set_power: set bt wake_host pin output high!
[  423.980538] [BT_RFKILL]: rfkill_rk_set_power: set bt wake_host pin input!
[  423.980608] [BT_RFKILL]: ENABLE UART_RTS
[  424.081438] [BT_RFKILL]: DISABLE UART_RTS
[  424.081539] [BT_RFKILL]: bt turn on power

 

2、查看蓝牙是否启动

# hciconfig -a
  <--- 蓝牙设备未启动
# bt_pcba_test <--- 启动蓝牙设备
# hciconfig -a
hci0:	Type: Primary  Bus: UART
	BD Address: 90:1B:07:8D:34:B0  ACL MTU: 1021:8  SCO MTU: 64:1
	DOWN <--- 蓝牙Down状态
	RX bytes:612 acl:0 sco:0 events:30 errors:0
	TX bytes:398 acl:0 sco:0 commands:30 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 

 

3、激活蓝牙

# hciconfig hci0 up
# hciconfig dev
hci0:	Type: Primary  Bus: UART
	BD Address: 90:1B:07:8D:34:B0  ACL MTU: 1021:8  SCO MTU: 64:1
	UP RUNNING 
	RX bytes:1224 acl:0 sco:0 events:60 errors:0
	TX bytes:796 acl:0 sco:0 commands:60 errors:0

# hciconfig -a <--- 查看详细信息
hci0:	Type: Primary  Bus: UART
	BD Address: 90:1B:07:8D:34:B0  ACL MTU: 1021:8  SCO MTU: 64:1
	UP RUNNING 
	RX bytes:1224 acl:0 sco:0 events:60 errors:0
	TX bytes:796 acl:0 sco:0 commands:60 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: 'BCM43438A1 26MHz AP6212A1_CL1 BT4.0 OTP-BD-0058'
	Class: 0x000000
	Service Classes: Unspecified
	Device Class: Miscellaneous, 
	HCI Version: 4.0 (0x6)  Revision: 0xf9
	LMP Version: 4.0 (0x6)  Subversion: 0x2209
	Manufacturer: Broadcom Corporation (15)

 

4、扫描看下

# hcitool scan
Scanning ...
	00:1A:7D:DA:71:13	CHENTONG1070
	70:BB:E9:C7:1B:1C	小米手机
	94:87:E0:B4:09:82	小米手机8
	50:3C:EA:AF:D7:00	OPPO R11s
	20:47:DA:BE:3B:B3	小米手机6
	28:B2:BD:CA:69:BB	GUOZF668
	20:18:06:25:62:79	HC-05
	34:D7:12:91:DC:C0	坚果 Pro 2 特别版