BLE操作在Linux下的操作

参考  
使用 Plugable USB-BT4LE adapter 或者  CSR  4.0

hciconfig  #查看设备存在.   sudo hciconfig hci0 up

正常产出
hci0:    Type: BR/EDR  Bus: UART
    BD Address: B8:27:EB:23:E2:A4  ACL MTU: 1021:8  SCO MTU: 64:1
    UP RUNNING
    RX bytes:1987 acl:0 sco:0 events:91 errors:0
    TX bytes:1647 acl:0 sco:0 commands:57 errors:0

扫描

sudo hcitool lescan

正常产出
LE Scan ...
 B0:B4:48:ED:44:C3 (unknown)
 B0:B4:48:ED:44:C3 CC2650 SensorTag

连接 设备

gatttool -I -b MAC-address
例如
$ gatttool -I -b B0:B4:48:ED:44:C3
 [B0:B4:48:ED:44:C3][LE]> connect
 Attempting to connect to B0:B4:48:ED:44:C3
 Connection successful
 [B0:B4:48:ED:44:C3][LE]>

通过 UUID读取内容

[B0:B4:48:ED:44:C3][LE]> char-read-uuid 00002a00-0000-1000-8000-00805f9b34fb
 handle: 0x0003      value: 53 65 6e 73 6f 72 54 61 67 20 32 2e 30

通过UUID设置. 需要先得到 handle, 然后设置. 

[B0:B4:48:ED:44:C3][LE]> characteristics 1 ffff f000aa72-0451-4000-b000-000000000000
 handle: 0x0046, char properties: 0x0a, char value handle: 0x0047, uuid: f000aa72-0451-4000-b000-000000000000  //得到句柄为 0x47
 [B0:B4:48:ED:44:C3][LE]> char-write-req 47 01  //通过句柄设置内容.
 Characteristic value was written successfully

使用Python操作 BLE. 

from bluepy import btle
import time
import binascii

//链接设备
 print "Connecting..."
 dev = btle.Peripheral("B0:B4:48:BF:C9:83")

 print "Services..."
 for svc in dev.services:
     print str(svc)

//链接 UUID
lightSensor = btle.UUID("f000aa70-0451-4000-b000-000000000000")

 lightService = dev.getServiceByUUID(lightSensor)
 for ch in lightService.getCharacteristics():
     print str(ch)

//设置 UUID属性
uuidConfig = btle.UUID("f000aa72-0451-4000-b000-000000000000")
 lightSensorConfig = lightService.getCharacteristics(uuidConfig)[0]
 # Enable the sensor
 lightSensorConfig.write(bytes("\x01"))

 time.sleep(1.0) # Allow sensor to stabilise

 uuidValue = btle.UUID("f000aa71-0451-4000-b000-000000000000")
 lightSensorValue = lightService.getCharacteristics(uuidValue)[0]
 # Read the sensor
 val = lightSensorValue.read()
 print "Light sensor raw value", binascii.b2a_hex(val)

==================================================================
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************************************************************************************************************
==================================================================
参考  

hcitool: linux 蓝牙操作的瑞士军*刀工具. 通过HCI 来操作蓝牙设备,  扫描或者命令(数据)读写BT/BLE.
gatttool: 访问蓝牙设备的 services. 

hcitool dev  ### 查询本机设备.

sudo hcitool lescan ### 执行 BLE 扫描

链接设备
sudo gatttool -b <BLE Address> -l ### -l 代表打开交互式对话.

在交互窗口中执行
connect ### 链接
primary ### 打印所有的UUIDs, 即所谓的 services
### 输出类似:
attr handle: 0x0001, end grp handle: 0x0007 uuid: 00001800-0000-1000-8000-00805f9b34fb
attr handle: 0x0008, end grp handle: 0x000b uuid: 00001801-0000-1000-8000-00805f9b34fb
attr handle: 0x000c, end grp handle: 0xffff uuid: 0000180f-0000-1000-8000-00805f9b34fb

char-desc ### 获取所有的句柄 handles,
输出类似于  handle: 0x0001, uuid: 2800
handle是由bluez确定的, 和某个特定的特征 characteristic(UUID) 绑定的.

char-read-hnd <handle> ### 从handle读取数据.
输出类似于 Characteristic value/descriptor: 64
返回的数值为 16 进制的内容.

char-write-req <handle> <data> ### 写句柄

==================================================================
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
************************************************************************************************************
通过 BLUEZ 的 HCI 接口直接操作  APIs
http://dev.ti.com/tirex/content/simplelink_cc2640r2_sdk_1_35_00_33/docs/ble5stack/ble_user_guide/html/doxygen/group___h_c_i.html 

其中 HCI_LE_*** 的部分为 BLE操作的APIs
例如   HCI_LE_CreateConnCmd