Python Twisted接收命令从TCP写入串行设备返回响应

Question

我已经设法连接到USB调制解调器,客户端可以通过tcp连接到我的reactor.listenTCP,从调制解调器收到的数据将被发送回客户端.我想从客户端获取dataReceived并将其发送到调制解调器..我正在努力让这个工作.任何帮助将非常感谢!代码:

from twisted.internet import win32eventreactor
win32eventreactor.install()
from twisted.internet import reactor
from twisted.internet.serialport import SerialPort
from twisted.internet.protocol import Protocol, Factory
from twisted.python import log
import sys

log.startLogging(sys.stdout)
client_list = []#TCP clients connecting to me

class USBClient(Protocol):

    def connectionFailed(self):
        print "Connection Failed:", self
        reactor.stop()

    def connectionMade(self):
        print 'Connected to USB modem'
        USBClient.sendLine(self, 'AT\r\n')

    def dataReceived(self, data):
        print "Data received", repr(data)
        print "Data received! with %d bytes!" % len(data)
        #check & perhaps modify response and return to client
        for cli in client_list:
            cli.notifyClient(data)
        pass

    def lineReceived(self, line):
        print "Line received", repr(line)

    def sendLine(self, cmd):
        print cmd
        self.transport.write(cmd + "\r\n")

    def outReceived(self, data):
        print "outReceived! with %d bytes!" % len(data)
        self.data = self.data + data

class CommandRx(Protocol):

    def connectionMade(self):
        print 'Connection received from tcp..'
        client_list.append(self)

    def dataReceived(self, data):
        print 'Command receive', repr(data)
        #Build command, if ok, send to serial port
        #????
    def connectionLost(self, reason):
        print 'Connection lost', reason
        if self in client_list:
            print "Removing " + str(self)
            client_list.remove(self)

    def notifyClient(self, data):
        self.transport.write(data)

class CommandRxFactory(Factory):
    protocol = CommandRx
    def __init__(self):
        client_list = []

if __name__ == '__main__':
    reactor.listenTCP(8000, CommandRxFactory())
    SerialPort(USBClient(), 'COM8', reactor, baudrate='19200')
    reactor.run()

Answer 1

你的问题不是关于扭曲,而是关于python.阅读此FAQ条目:

如何在一个连接上输入导致另一个连接的输出？

事实上,如果你想通过串行连接协议将内容发送到TCP连接的客户端,只需将协议传递给工厂,这样你就可以使用该引用来建立桥接器.

这是一些大致如下的示例代码:

class USBClient(Protocol):
    def __init__(self, network):
        self.network = network
    def dataReceived(self, data):
        print "Data received", repr(data)
        #check & perhaps modify response and return to client
        self.network.notifyAll(data)
    #...    

class CommandRx(Protocol):
    def connectionMade(self):
        self.factory.client_list.append(self)
    def connectionLost(self, reason):
        if self in self.factory.client_list:
            self.factory.client_list.remove(self)

class CommandRxFactory(Factory):
    protocol = CommandRx
    def __init__(self):
        self.client_list = []

    def notifyAll(self, data):
        for cli in self.client_list:
            cli.transport.write(data)

初始化时,传递参考:

tcpfactory = CommandRxFactory()
reactor.listenTCP(8000, tcpfactory)
SerialPort(USBClient(tcpfactory), 'COM8', reactor, baudrate='19200')
reactor.run()