标签:bluetooth linux python android
您如何通过蓝牙和Python处理和接收串行数据?
我正在尝试制作一个简单的Python服务器,该服务器通过蓝牙将数据访问为explained here.
我的server.py文件在发送文本“ temp”时发送一个随机数,它是:
#!/usr/bin/env python
import os
import glob
import time
import random
from bluetooth import *
def read_temp():
return random.random()
server_sock=BluetoothSocket( RFCOMM )
server_sock.bind(("",PORT_ANY))
server_sock.listen(1)
port = server_sock.getsockname()[1]
uuid = "94f39d29-7d6d-437d-973b-fba39e49d4ee"
advertise_service( server_sock, "TestServer",
service_id = uuid,
service_classes = [ uuid, SERIAL_PORT_CLASS ],
profiles = [ SERIAL_PORT_PROFILE ],
# protocols = [ OBEX_UUID ]
)
while True:
print "Waiting for connection on RFCOMM channel %d" % port
client_sock, client_info = server_sock.accept()
print "Accepted connection from ", client_info
try:
data = client_sock.recv(1024)
if len(data) == 0: break
print "received [%s]" % data
if data == 'temp':
data = str(read_temp())+'!'
client_sock.send(data)
else:
data = 'WTF!'
client_sock.send(data)
print "sending [%s]" % data
except IOError:
pass
except KeyboardInterrupt:
print "disconnected"
client_sock.close()
server_sock.close()
print "all done"
break
当我第一次运行它时,我得到了错误:
bluetooth.btcommon.BluetoothError: (2, 'No such file or directory')
可以通过启用兼容模式并通过编辑文件/lib/systemd/system/bluetooth.service并更改行来加载串行配置文件来修复Googled showed
ExecStart=/usr/lib/bluetooth/bluetoothd
至:
ExecStart=/usr/lib/bluetooth/bluetoothd -C
然后运行sudo sdptool add SP.
现在python server.py似乎可以正常运行,并且我可以将运行它的机器与我的Android手机配对.但是,似乎无法接收任何数据.
我曾经尝试使用蓝牙终端仿真应用程序,例如BlueTerm,BT Simple Terminal和Arduino BT,但是当我连接到服务器时,输入文本并按Enter,则server.py没有响应.它最初将报告“ Accepted connection …”并且已接收到空字符串,但此后将什么也没有接收到.
由于没有报告任何明显的错误,所以我不确定如何诊断问题.如何确定问题是否出在我的Python代码中?还是服务器上的蓝牙配置?还是我的Android手机?
解决方法:
正确的代码是:
#!/usr/bin/env python
"""
A simple test server that returns a random number when sent the text "temp" via Bluetooth serial.
"""
import os
import glob
import time
import random
from bluetooth import *
server_sock = BluetoothSocket( RFCOMM )
server_sock.bind(("",PORT_ANY))
server_sock.listen(1)
port = server_sock.getsockname()[1]
uuid = "94f39d29-7d6d-437d-973b-fba39e49d4ee"
advertise_service( server_sock, "TestServer",
service_id = uuid,
service_classes = [ uuid, SERIAL_PORT_CLASS ],
profiles = [ SERIAL_PORT_PROFILE ],
# protocols = [ OBEX_UUID ]
)
print "Waiting for connection on RFCOMM channel %d" % port
client_sock, client_info = server_sock.accept()
print "Accepted connection from ", client_info
while True:
try:
req = client_sock.recv(1024)
if len(req) == 0:
break
print "received [%s]" % req
data = None
if req in ('temp', '*temp'):
data = str(random.random())+'!'
else:
pass
if data:
print "sending [%s]" % data
client_sock.send(data)
except IOError:
pass
except KeyboardInterrupt:
print "disconnected"
client_sock.close()
server_sock.close()
print "all done"
break
标签:bluetooth,linux,python,android 来源: https://codeday.me/bug/20191118/2030796.html
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