Bash Script for Reading Sensors and Plotting RRD Graphs

#bin/sh

fetch_data() {
  lines=($(/bin/cat temp.txt))
  temp=${lines[0]}
  hum=${lines[1]}
  pres=${lines[2]}
  rm "temp.txt"
}

sudo /usr/local/bin/upnp2mrtg > temp.txt
fetch_data
/usr/bin/rrdtool update /var/www/rrd/fritzbox.rrd N:$temp:$hum

sudo /usr/local/bin/dht22.py > temp.txt
fetch_data
temp=($(/usr/bin/python -c "print $temp/10.0"))
hum=($(/usr/bin/python -c "print $hum/10.0"))
/usr/bin/rrdtool update /var/www/rrd/dht22-pi.rrd N:$temp:$hum

/usr/bin/wget -q -O temp.txt http://nodemcu1/
fetch_data
temp=($(/usr/bin/python -c "print $temp/10.0"))
hum=($(/usr/bin/python -c "print $hum/10.0"))
/usr/bin/rrdtool update /var/www/rrd/dht22-nodemcu1.rrd N:$temp:$hum

/usr/bin/wget -q -O temp.txt http://nodemcu2/
fetch_data
temp=($(/usr/bin/python -c "print $temp/10.0"))
hum=($(/usr/bin/python -c "print $hum/10.0"))
/usr/bin/rrdtool update /var/www/rrd/dht22-nodemcu2.rrd N:$temp:$hum
/usr/bin/wget -q -O temp.txt http://nodemcu3/
fetch_data
temp=($(/usr/bin/python -c "print $temp/10.0"))
hum=($(/usr/bin/python -c "print $hum/10.0"))
/usr/bin/rrdtool update /var/www/rrd/dht22-nodemcu3.rrd N:$temp:$hum


# create graphs
/usr/bin/rrdtool graph /var/www/rrd/fritzbox-day.png \
--width=400 --height=140 -s 'now - 1 day' -e 'now' \
--watermark "Fritzbox traffic: `date`" \
DEF:inoctets=/var/www/rrd/fritzbox.rrd:in:AVERAGE \
DEF:outoctets=/var/www/rrd/fritzbox.rrd:out:AVERAGE \
LINE2:inoctets#00FF00:"In traffic" \
LINE2:outoctets#0000FF:"Out traffic"

/usr/bin/rrdtool graph /var/www/rrd/dht22-pi-day.png \
--width=400 --height=140 -s 'now - 1 day' -e 'now' \
--watermark "Kitchen Window: `date`" \
DEF:Temp=/var/www/rrd/dht22-pi.rrd:temp:AVERAGE \
LINE2:Temp#FF0000:"Temp deg. C" \
DEF:Hum=/var/www/rrd/dht22-pi.rrd:hum:AVERAGE \
LINE2:Hum#00FF00:"RH %" \
CDEF:avg_temp=Temp,300,TREND \
CDEF:avg_hum=Hum,300,TREND \
GPRINT:avg_temp:AVERAGE:"Avg Temp\: %2.1lf%s" \
GPRINT:avg_hum:AVERAGE:"Avg Hum.\: %2.1lf%s\n"

/usr/bin/rrdtool graph /var/www/rrd/dht22-nodemcu1-day.png \
--width=400 --height=140 -s 'now - 1 day' -e 'now' \
--watermark "Living Room: `date`" \
DEF:Temp=/var/www/rrd/dht22-nodemcu1.rrd:temp:AVERAGE \
LINE2:Temp#FF0000:"Temp deg. C" \
DEF:Hum=/var/www/rrd/dht22-nodemcu1.rrd:hum:AVERAGE \
LINE2:Hum#00FF00:"RH %" \
CDEF:avg_temp=Temp,300,TREND \
CDEF:avg_hum=Hum,300,TREND \
GPRINT:avg_temp:AVERAGE:"Avg Temp\: %2.1lf%s" \
GPRINT:avg_hum:AVERAGE:"Avg Hum.\: %2.1lf%s\n"

/usr/bin/rrdtool graph /var/www/rrd/dht22-nodemcu2-day.png \
--width=400 --height=140 -s 'now - 1 day' -e 'now' \
--watermark "Clothing room: `date`" \
DEF:Temp=/var/www/rrd/dht22-nodemcu2.rrd:temp:AVERAGE \
LINE2:Temp#FF0000:"Temp deg. C" \
DEF:Hum=/var/www/rrd/dht22-nodemcu2.rrd:hum:AVERAGE \
LINE2:Hum#00FF00:"RH %" \
CDEF:avg_temp=Temp,300,TREND \
CDEF:avg_hum=Hum,300,TREND \
GPRINT:avg_temp:AVERAGE:"Avg Temp\: %2.1lf%s" \
GPRINT:avg_hum:AVERAGE:"Avg Hum.\: %2.1lf%s\n"

/usr/bin/rrdtool graph /var/www/rrd/dht22-nodemcu3-day.png \
--width=400 --height=140 -s 'now - 1 day' -e 'now' \
--watermark "Bedroom: `date`" \
DEF:Temp=/var/www/rrd/dht22-nodemcu3.rrd:temp:AVERAGE \
LINE2:Temp#FF0000:"Temp deg. C" \
DEF:Hum=/var/www/rrd/dht22-nodemcu3.rrd:hum:AVERAGE \
LINE2:Hum#00FF00:"RH %" \
CDEF:avg_temp=Temp,300,TREND \
CDEF:avg_hum=Hum,300,TREND \
GPRINT:avg_temp:AVERAGE:"Avg Temp\: %2.1lf%s" \
GPRINT:avg_hum:AVERAGE:"Avg Hum.\: %2.1lf%s\n"