安装蓝牙通讯模块pybluez
Windows下pybluez的安装
注：本文的开发环境为Windows10+Python3.7.3html
pip install pybluez
安装过程当中会出现以下图所示的问题：
产生这种问题的缘由是windows系统没有安装相应的SDK，没有 Microsoft SDKs这个文件夹，解决办法以下：python
windows7安装文件的下载地址：https://www.microsoft.com/en-us/download/details.aspx?id=8279编程
安装对应系统的SDK以前，最好先卸载系统里的Visual C++ 2010 Redistributable和.NET.Framework再安装对应的SDK服务器
再次安装 pybluez仍是有错误，查看安装目录，按照setup.py要求MS_SDK = r'Microsoft SDKs\Windows\v6.0A' 目录socket
windows7须要手动修改Microsoft SDKs下文件夹v7.1为v6.0Aide
windows10须要手动修改Microsoft SDKs下文件夹v10.0A为v7.0Acode
完成后再安装新的Visual C++ 2010 Redistributable和.NET.Frameworkserver
windows10通过以上步骤后，依然会出现以下的问题：htm
这种问题最简单的方法是装个visual studio2017以上的软件的C++编译环境，再次安装便可成功
Linux下pybluez的安装
安装pybluez模块以前先要安装libbluetooth-dev，不然会报错。
蓝牙通讯模块pybluez的使用
选择蓝牙通讯对象
经过用户友好的名字来寻找通讯对象
import bluetooth
target_name = "My Device"
target_address = None
nearby_devices = bluetooth.discover_devices()
for bdaddr in nearby_devices:
if target_name == bluetooth.lookup_name( bdaddr ):
target_address = bdaddr
break
if target_address is not None:
print("found target bluetooth device with address ", target_address)
else:
print("could not find target bluetooth device nearby")
查询设备服务
import bluetooth
nearby_devices = bluetooth.discover_devices(lookup_names=True)
for addr, name in nearby_devices:
print(" %s - %s" % (addr, name))
services = bluetooth.find_service(address=addr)
for svc in services:
print("Service Name: %s" % svc["name"])
print(" Host: %s" % svc["host"])
print(" Description: %s" % svc["description"])
print(" Provided By: %s" % svc["provider"])
print(" Protocol: %s" % svc["protocol"])
print(" channel/PSM: %s" % svc["port"])
print(" svc classes: %s "% svc["service-classes"])
print(" profiles: %s "% svc["profiles"])
print(" service id: %s "% svc["service-id"])
print("")
经过RFCOMM方式进行通讯
采用相似于socket编程模型的方式进行蓝牙通讯的编程
1.服务器端程序
import bluetooth
server_sock=bluetooth.BluetoothSocket( bluetooth.RFCOMM )
port = 1
server_sock.bind(("",port))
server_sock.listen(1)
client_sock,address = server_sock.accept()
print "Accepted connection from ",address
data = client_sock.recv(1024)
print "received [%s]" % data
client_sock.close()
server_sock.close()
2. 客户端程序
import bluetooth
bd_addr = "01:23:45:67:89:AB"
port = 1
sock=bluetooth.BluetoothSocket( bluetooth.RFCOMM )
sock.connect((bd_addr, port))
sock.send("hello!!")
sock.close()
经过L2CAP方式进行通讯
L2CAP的sockets方式几乎等同于RFCOMM的sockets方式，惟一的不一样是经过L2CAP的方式，而且端口是0x1001到0x8FFF之间的奇数端口。默认的链接能够传送的可靠报文是672个字节。
1.服务器端程序
import bluetooth
server_sock=bluetooth.BluetoothSocket( bluetooth.L2CAP )
port = 0x1001
server_sock.bind(("",port))
server_sock.listen(1)
client_sock,address = server_sock.accept()
print "Accepted connection from ",address
data = client_sock.recv(1024)
print "received [%s]" % data
client_sock.close()
server_sock.close()
2.客户端程序
import bluetooth
sock=bluetooth.BluetoothSocket(bluetooth.L2CAP)
bd_addr = "01:23:45:67:89:AB"
port = 0x1001
sock.connect((bd_addr, port))
sock.send("hello!!")
sock.close()
调整MTU大小
l2cap_sock = bluetooth.BluetoothSocket( bluetooth.L2CAP )
.
. # connect the socket
.
bluetooth.set_l2cap_mtu( l2cap_sock, 65535 )
参考文献