IT Solutions Technology Blog

   RRDtool can be easily integrated in shell scripts, perl, python, ruby, lua or tcl applications

# apt-get update
# apt-get upgrade -y
# rpi-update

# apt-get install rrdtool
# apt-get install php5-cli php5-cgi

# mkdir /usr/local/bin/Temperatur
# cd /usr/local/bin/Temperatur

# rrdtool create TemperaturAufzeichnung.rrd –step 300 DS:temp:GAUGE:600:-30:100 RRA:AVERAGE:0.5:1:1200 RRA:MIN:0.5:12:2400 RRA:MAX:0.5:12:2400 RRA:AVERAGE:0.5:12:2400

# vi TemperaturAufzeichnen.php
#!/usr/bin/php
<?php
$temperatur01 = exec(‚cat /sys/bus/w1/devices/28-< ID >/w1_slave |grep t=‘);
$temperatur01 = explode(‚t=‘,$temperatur01);
$temperatur01 = $temperatur01[1] / 1000;
$temperatur01 = round($temperatur01,2);
exec(„/usr/bin/rrdtool update /usr/local/bin/Temperatur/TemperaturAufzeichnung.rrd N:$temperatur01“);
?>

# chmod +x TemperaturAufzeichnen.php

# crontab -e
*/10 * * * * php5 /usr/local/bin/Temperatur/TemperaturAufzeichnen.php > /dev/null 2>&1

# vi TemperaturGrafikErstellen.sh
#!/bin/sh
rrdtool graph /usr/local/bin/Temperatur/TemperaturTag.png   -s ’now – 1 day‘  -e ’now‘  DEF:temp=/usr/local/bin/Temperatur/TemperaturAufzeichnung.rrd:temp:AVERAGE LINE2:temp#000000:Wintergarten

# crontab -e
*/30 * * * * cd /usr/local/bin/Temperatur && sh TemperaturGrafikErstellen.sh > /dev/null 2>&1