Kermit script to capture HP 8591 spectrum analyzer screen image

gethp8591

#!/usr/bin/kermit +
# Fetches screen shot from HP8591E spectrum analyzer
# Presumes it's set up for plotter output...
# Converts HPGL to PNG image

# use raw-socket to disable telnet termination chars
set host 192.168.1.40 7002 /raw-socket
set modem none

# Make sure we have a param
if not defined \%1 ask \%1 {File name? }

set input echo off
set input buffer-length 200000

# Tell it what size to plot
echo Triggering plot output...
output plot 0,0,60000,40000;

log session "\%1.hgl"

# Wait for end of data stream
input 400 SP;

echo ... HPGL data captured

close session
close

echo Converting HPGL in 
echo --\%1.hgl
echo to PNG in
echo --\%1.png

run hp2xx -q -m png -c 1436 "\%1.hgl"

echo Cropping and resizing
#run mogrify -crop "515x395+0+0!" "\%1.png"
run mogrify -density 300 -resize 200% "\%1.png"

echo Finished!

exit 0

More details on my blog at https://wp.me/poZKh-7qI