Accessing Windows Serial Port

[Roel Schroeven]

George T. schreef:
> I need to access the serial port via python on a windows machine.
> Reading on the web, there are three solutions:  pyserial, siomodule and
> USPP.  pyserial seems to be the best option since the other two are
> tested with Windows 95 and older versions of python.  Would you agree
> with this or have I missed an option?

I hadn't even heard of siomodule and USPP; pyserial is what I use when I 
need to read/write from/to the serial port.

> Can anyone provide me an example of how to access the serial port with
> pyserial?

It's quite simple; there are a number of examples on pyserial's website. 
Here's a small quick and dirty script that reads data from a serial port 
and broadcasts it as UDP over the network to make the incoming data 
available to other computers in the office:

import socket
import sys

import serial

ser = serial.Serial('COM1', 38400, timeout=1)
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
while True:
     msg = ser.readline()
     sock.sendto(msg, ('<broadcast>', 5000))
     sys.stdout.write(msg)


Basically you can use the objects like other file-like objects.


-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven