I'm doing some data-collection using some dedicated devices outputing via
their serial port, and I've run into a few roadblocks. My specific example
is a BASIC Stamp that's outputting temp every 60 seconds. I know that the
data is coming into the Linux serial port, as I can view the data using cu.
I've cheated the process by setting up one terminal window to do 'cu -l
/dev/ttyS0 > temp.dat', and in another terminal window I've got a perl
script that does a 'tail -f' every 60 seconds, appends the time, and writes
out to another file. Now I now the temp and time (the BASIC Stamp can't
send out time), which I could (for example) read in another perl script and
output to html.
My issue is that I want to do this all with perl, in one script. Call it my
nature to make it as 'simple' as possible. I've tried working with the
serial port in perl, but I can't find any simple examples that show how to
read the serial port (BTW, I don't give a darn about writing to the serial
port, as this is data collection). My goal is to be able to set up a simple
routine that monitors the serial port for one data line terminating in
CR/LF. That's it. I'd prefer not to have to read character by character (as
I know every line will end in CR/LF), but will if I have to.
I know this is a 20-line perl script, to read the serial port for one line
of data, append some formatted date info, and append to a disk file. But
I'm in need of some breadcrumbs. Just one simple loop that reads for a
line, so I can continue with my script.
Thanks in advance to anyone who's done simple data collection on a serial
port, using Linux.
Thanks!
Steve B.
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