Re: /dev/ttyUSB0 communication - shell script - Watchport/H

[Ron Johnson <ron.l.johnson@cox.net>]

On 2009-09-01 06:31, Tomek Kruszona wrote:
> Ron Johnson wrote:
> > The problem I see is knowing when new data arrives on /dev/ttyUSB0.
> >  There's obviously a solution, since minicom does it, but it might
> > involve async interrupt handlers, which would probably require a small C
> > program which reads /dev/ttyUSB0 and outputs it to stdout.
> >
> > Digging through the source code of /usr/bin/tail to see how it
> > implements the "-f" option would also be helpful.
>
> Thank you for your quick answer!
> I'm not programmer so I hope that there is ready-to-use program that
> does the same as minicom but without interface and able to work in
> one-line script :)

I just Googled "linux listen to serial port", and got several 
interesting hits.

From reading those links, this Python snippet *might* work:

import sys
f = open('/dev/ttyUSB0', 'r')
try:
    while 1:
        l = f.readline()
        print l
except:
    f.close

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