基于python实现蓝牙通信代码实例

时间：2021-07-26 07:53:44|栏目：Python代码|点击：次

这篇文章主要介绍了基于python实现蓝牙通信代码实例,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

安装和示例

linux下安装

sudo apt-get install python-pip libglib2.0-dev
sudo pip install bluepy

官方示例

import btle
class MyDelegate(btle.DefaultDelegate):
	def __init__(self, params):
	btle.DefaultDelegate.__init__(self)#..
	.initialise here
def handleNotification(self, cHandle,
	data): #...perhaps check cHandle#...process 'data'
#
Initialisation-- -- -- -
p = btle.Peripheral(address)
p.setDelegate(MyDelegate(params))
# Setup to turn notifications on, e.g.#svc =
	p.getServiceByUUID(service_uuid)# ch =
	svc.getCharacteristics(char_uuid)[0]# ch
	.write(setup_data)
# Main loop-- -- -- --
while True:
	if p.waitForNotifications(1.0): #
	handleNotification() was called
continue
print "Waiting..."#
Perhaps do something
else here

蓝牙通信模块pybluez的使用

选择蓝牙通信对象

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("")

通过RFCOMM方式进行通信

采用类似于socket编程模型的方式进行蓝牙通信的编程

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()

通过L2CAP方式进行通信

L2CAP的sockets方式几乎等同于RFCOMM的sockets方式，唯一的不同是通过L2CAP的方式，并且端口是0x1001到0x8FFF之间的奇数端口。默认的连接可以传送的可靠报文是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 )

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