The weather.

A while back I had developed a way to download weather maps and then convert them to ascii for use on text only terminal or character lcd’s Made a modification or two in some of the code.

As you remember we modified the crontab file so the system would download radar images once a minute.

Crontab:

Edit this file to introduce tasks to be run by cron.
#
# Each task to run has to be defined through a single line
# indicating with different fields when the task will be run
# and what command to run for the task
#
# To define the time you can provide concrete values for
# minute (m), hour (h), day of month (dom), month (mon),
# and day of week (dow) or use ‘*’ in these fields (for ‘any’).#
# Notice that tasks will be started based on the cron’s system
# daemon’s notion of time and timezones.
#
# Output of the crontab jobs (including errors) is sent through
# email to the user the crontab file belongs to (unless redirected).
#
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
#
# For more information see the manual pages of crontab(5) and cron(8)
#
# m h dom mon dow command
*/1 * * * * /home/eddie/bin/d.sh

Then we used d.sh to brab the radar pictures

d.sh

DAY=$(date +”%m%d%y%H%M%S”)
picfn=”pic$DAY.png”
# echo $picfn
# wget http://radar.weather.gov/ridge/Thumbs/FWS.png -O fws$DAY.png

Then each picture needed to be converted. Instead of redoing every picture, the command file only redoes the pictures that have not already been converted.

convert.sh

.for g in Fws*.png

do
if [ -f $g.txt ];
then
echo $g.txt already written
else
echo $g.txt not written yet
img2txt -W 80 -f utf8 img2txt -W 160 -H 50 utf8 $g > $g.txt
fi
done

Then lastly we needed a command file to display the data to the screen like a radar would displaying each picture on after the other.

show.sh

clear
for g in Fws*.txt
do
tput cup 0 0
cat $g
done