python實現藍牙通信

 

安裝和示例

linux下安裝

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

 

藍牙通信模塊pybluez的使用

選擇藍牙通信對象

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")

查詢設備服務 

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("")

通過RFCOMM方式進行通信

采用類似於socket編程模型的方式進行藍牙通信的編程

1.服務器端程序

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. 客戶端程序

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()

 

通過L2CAP方式進行通信

L2CAP的sockets方式幾乎等同於RFCOMM的sockets方式，唯一的不同是通過L2CAP的方式，並且端口是0x1001到0x8FFF之間的奇數端口。默認的連接可以傳送的可靠報文是672個字節。

1.服務器端程序

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.客戶端程序

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()

 

調整MTU大小

l2cap_sock = bluetooth.BluetoothSocket( bluetooth.L2CAP )
 # connect the socket
bluetooth.set_l2cap_mtu( l2cap_sock, 65535 )

 

refer：

An Introduction to Bluetooth Programming

Python之藍牙通信模塊pybluez學習筆記