Create a virtual serial port connection over TCP

Question

I am developing an application that should be able to write to a virtual serial port and receive data through the same port from remote clients over network.

The applica

Answer 1

you have socat and ser2net and other programs but my experience is very bad... not working properly. I've done this small python program, can be useful. Update port, baudrate... then use any tcp client. Remove first line if don't want to use is as auto executable script

#!/usr/bin/python

import socket
import sys
import serial

#open serial port
ser = serial.Serial('/dev/ttyAMA0', 115200, timeout=0)
#create socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)

#bond to the port. Don't use localhost to accept external connections
server_address = ('', 2105)
print('starting up on {} port {}'.format(*server_address))
sock.bind(server_address)

#listen
sock.listen(1)

#loop
while True:
    #waits for a new connection
    print('waiting for a connection')
    connection, client_address = sock.accept()
    try:
        print('connection from', client_address)
        #continously send from serial port to tcp and viceversa
        connection.settimeout(0.1)
        while True:
            try:
                data = connection.recv(16)
                if data == '': break
                ser.write(data)
            except KeyboardInterrupt:
                connection.close()
                sys.exit()
            except Exception as e:
                pass
            received_data = ser.read(ser.inWaiting())
            connection.sendall(received_data)
    except Exception as e:
        print e

    finally:
        #clean up connection
        connection.close()