[Tutor] question about serial coms

Hans Dushanthakumar Hans.Dushanthakumar at navman.com
Mon Nov 14 21:29:48 CET 2005

Ive worked on a similar application. I used one thread to read from the serial port and another one to handle the writes. 

-----Original Message-----
From: tutor-bounces at python.org [mailto:tutor-bounces at python.org] On Behalf Of Hugo González Monteverde
Sent: Tuesday, 15 November 2005 7:36 a.m.
To: nephish
Cc: tutor
Subject: Re: [Tutor] question about serial coms

Hi Nephish,

Are you using pyserial or rolling your own? Normally you can write and read to the /dev/ttySXX file at the same time; since they're special files, not ordinary files, the driver handles that.

Handling both writing and reading in your program's flow control is a wholly different matter, though. You might  need to use select()  to avoid blocking.

Are you using two completely different scripts for reding and writing?

There is some valuable info, if not about python, in the Serial Programming howto, at:



nephish wrote:
> Hey there,
> 	i am developing on a linux computer with the serial module. Now, i 
> already am able to recieve info from a serial RS232 device and process 
> everything ok. What i need to do now is write to the serial device, 
> but i also need to be able to not interrupt the script that is reading 
> from it.
> 	I guess my question is, do i have to interrupt the reading script to 
> write to the same RS232 device ?
> 	and if so, how do i do that?
> 	thanks,
> 	shawn
> _______________________________________________
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