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1、bluepy 簡(jiǎn)介
bluepy 是github上一個(gè)很好的藍(lán)牙開(kāi)源項(xiàng)目，其地址在 LINK-1， 其主要功能是用python實(shí)現(xiàn)linux上BLE的接口。
This is a project to provide an API to allow access to Bluetooth Low Energy devices from Python. At present it runs on Linux only; I've mostly developed it using a Raspberry Pi, but it will also run on x86 Debian Linux.
支持python版本：The code is tested on Python 2.7 and 3.4; it should also work on 3.3.
2、安裝
直接源碼安裝，python3加持：
sudo apt-get install git build-essential libglib2.0-dev git clone https://github.com/IanHarvey/bluepy.git cd bluepy python3 setup.py build sudo python3 setup.py install
注：不要用python2，這輩子都不會(huì)用python2!
注：進(jìn)行到這一步突然驚醒我的臺(tái)式機(jī)無(wú)藍(lán)牙，遂開(kāi)啟我的無(wú)屏幕樹(shù)莓派，用命令找其ip，并用ssh登錄：
➜ Downloads sudo nmap -sS -p 22 192.168.31.0/24 | grep -B 5 -A 0 "Pi" Nmap scan report for 192.168.31.51 Host is up (0.19s latency). PORT STATE SERVICE 22/tcp open ssh MAC Address: B8:27:EB:71:33:AE (Raspberry Pi Foundation) ➜ Downloads ssh pi@192.168.31.51 pi@192.168.31.51's password: 1234
3、看文檔，玩DEMO
bluepy 的文檔地址 LINK-2
在bluepy中新建一個(gè)examples文件夾，用來(lái)存放接下來(lái)我們的測(cè)試DEMO：
3.1 scan devices demo
這里第一個(gè)DEMO是BLE設(shè)備掃描，這里用到了Scanner對(duì)象，該對(duì)象可以用來(lái)搜索BLE設(shè)備的廣播包數(shù)據(jù)。在大多數(shù)情況下該對(duì)象將會(huì)掃描出周?chē)锌蛇B接設(shè)備。
下面是我改造為python3的代碼：
➜ examples git:(master) ✗ cat scan.py
#!/usr/bin/env python
# coding=utf-8
from bluepy.btle import Scanner, DefaultDelegate
class ScanDelegate(DefaultDelegate):
def __init__(self):
DefaultDelegate.__init__(self)
def handleDiscovery(self, dev, isNewDev, isNewData):
if isNewDev:
print("Discovered device", dev.addr)
elif isNewData:
print("Received new data from", dev.addr)
scanner = Scanner().withDelegate(ScanDelegate())
devices = scanner.scan(10.0)
for dev in devices:
print("Device %s (%s), RSSI=%d dB" % (dev.addr, dev.addrType, dev.rssi))
for (adtype, desc, value) in dev.getScanData():
print(" %s = %s" % (desc, value))
執(zhí)行效果如下：
注：注意用sudo運(yùn)行，更詳細(xì)的接口見(jiàn) LINK-3
3.2 get services
bluepy 的DEMO有點(diǎn)少，我又找了個(gè)專(zhuān)是DEMO的github項(xiàng)目：LINK-5
將其中的getServices.py改造下：
➜ examples git:(master) ✗ cat get_setvices.py
import sys
from bluepy.btle import UUID, Peripheral
if len(sys.argv) != 2:
print("Fatal, must pass device address:", sys.argv[0], "<device address="">")
quit()
p = Peripheral(sys.argv[1],"public")
services=p.getServices()
#displays all services
for service in services:
print(service)
其中Peripheral(sys.argv[1],"public")是用mac地址創(chuàng)建一個(gè)連接，由于我們上一步用scan搜索到的mac地址為public類(lèi)型，因此這里第二個(gè)參數(shù)為"public"，更詳細(xì)的介紹見(jiàn) LINK-6；
其中g(shù)etServices會(huì)返回所連接設(shè)備的服務(wù)；
執(zhí)行效果如下：
3.3 get characteristics
同3.2獲取characteristic的代碼如下：
➜ examples git:(master) ✗ cat get_characteristics.py
import sys
from bluepy.btle import UUID, Peripheral
if len(sys.argv) != 2:
print("Fatal, must pass device address:", sys.argv[0], "<device address="">")
quit()
p = Peripheral(sys.argv[1],"public")
chList = p.getCharacteristics()
print("Handle UUID Properties")
print("-------------------------------------------------------")
for ch in chList:
print(" 0x"+ format(ch.getHandle(),'02X') +" "+str(ch.uuid) +" " + ch.propertiesToString())
執(zhí)行效果如下：
3.4 get device name
直接上代碼：
➜ examples git:(master) ✗ cat get_device_name.py
import sys
from bluepy.btle import UUID, Peripheral
dev_name_uuid = UUID(0x2A00)
if len(sys.argv) != 2:
print("Fatal, must pass device address:", sys.argv[0], "<device address="">")
quit()
p = Peripheral(sys.argv[1],"public")
try:
ch = p.getCharacteristics(uuid=dev_name_uuid)[0]
if (ch.supportsRead()):
print(ch.read())
finally:
p.disconnect()
運(yùn)行效果如下：
小結(jié)
bluepy 是非常棒的一款藍(lán)牙BLE工具，掌握它會(huì)為你節(jié)省比較多的時(shí)間～
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