https://github.com/stwalkerster/Adafruit-Raspberry-Pi-Python-Code/blob/master/Adafruit_DHT_Driver/Adafruit_DHT.c compiled to "temphumid"

temp.sh

#!/bin/bash

cd /root

DATA=`./temphumid 4`
old=$IFS
IFS='
'

val="N"
for x in $DATA; do
        val=$val":"$x
done

# echo $val

# rrdtool create environment.rrd --start `date +%s` --step 300 \
# DS:temp:GAUGE:600:0:U \
# DS:humid:GAUGE:600:0:U \
# RRA:AVERAGE:0.5:1:288 \
# RRA:AVERAGE:0.5:3:672 \
# RRA:AVERAGE:0.5:12:744 \
# RRA:AVERAGE:0.5:72:1480

rrdtool update environment.rrd $val

IFS=$old

rrdtool graph /var/www/th.png -u 100 -l 0 -w 800 -h 300 -s `date -d -1day +%s` -e `date +%s` --title "Temperature and Humidity (last day)" "DEF:temp=environment.rrd:temp:AVERAGE" "DEF:tempyesterda$