serial_to_socket.py

import serial
import socket
import argparse
import sys

NEWLINE = "\r\n"

if __name__ == "__main__":
    p = argparse.ArgumentParser()
    p.add_argument("com_port")
    p.add_argument("target_host")
    p.add_argument("target_port", type=int)
    p.add_argument("--baud", default=9600, type=int)
    p.add_argument("--strip_newlines", action="store_true")

    args = p.parse_args()

    ser = serial.Serial()
    ser.port = args.com_port
    ser.baudrate = args.baud

    try:
        ser.open()
    except serial.SerialException, e:
        sys.stderr.write("Could not open serial port: %s" % e)
        sys.exit(1)

    while True:
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        sock.bind((args.target_host, args.target_port))
        sock.listen(5)
        conn, addr = sock.accept()
        while True:
            data = ""
            while NEWLINE not in data:
                data = data + ser.read(1)

            if args.strip_newlines:
                data = data.strip(NEWLINE)

            sys.stderr.write(".")
            try:
                conn.sendall(data)
            except socket.error:
                conn.close()
                break