######   create_astrowetter.sh #######

#!/bin/bash

rrdtool create /srv/scripts/tinker/astrowetter.rrd \
  --step 300 \
  DS:t_sky:GAUGE:650:-80:100 \
  DS:t_ambient:GAUGE:650:-50:100 \
  DS:t_delta:GAUGE:650:-50:200 \
  DS:light:GAUGE:650:0:65535 \
  DS:humidity:GAUGE:650:0:100 \
  RRA:AVERAGE:0.5:1:130000 \
  RRA:MIN:0.5:60:720 \
  RRA:MAX:0.5:60:720
  




###### astrowetter.php ########

<?php

require_once('Tinkerforge/IPConnection.php');
require_once('Tinkerforge/BrickletTemperatureIR.php');
require_once('Tinkerforge/BrickletAmbientLight.php');
require_once('Tinkerforge/BrickletHumidity.php');

use Tinkerforge\IPConnection;
use Tinkerforge\BrickletTemperatureIR;
use Tinkerforge\BrickletAmbientLight;
use Tinkerforge\BrickletHumidity;

$RRDB = "/srv/scripts/astrowetter/astrowetter.rrd";
$host = '192.168.0.40';
$port = 4223;

#   Auslesen des IR Bricklet
$uid = '9oC'; // Change to your UID

$ipcon = new IPConnection($host, $port); // Create IP connection to brickd
$tir = new BrickletTemperatureIR($uid); // Create device object

$ipcon->addDevice($tir); // Add device to IP connection
// Don't use device before it is added to a connection

// Get current object and ambient temperatures (unit is ÁC/10)
$obj = $tir->getObjectTemperature() / 10.0; 
$amb = $tir->getAmbientTemperature() / 10.0;

#   Ende Auslesen des IR-Bricklet


#   Beginn Auslesen des Ambibient Light Bricklet
$uid = '8Ss'; // Change to your UID

$ipcon = new IPConnection($host, $port); // Create IP connection to brickd
$al = new BrickletAmbientLight($uid); // Create device object

$ipcon->addDevice($al); // Add device to IP connection
// Don't use device before it is added to a connection

// Get current illuminance (unit is Lux/10)  
$illuminance = $al->getIlluminance() / 10.0; 
#   Ende Auslesen des Ambient-Light Bricklets




# Beginn der Auswertung
# =====================

$deltat = $obj - $amb;

setlocale ( 'LC_TIME', 'de_DE' );
date_default_timezone_set('CET');
$zeit = date("d.m.Y - H:i T");   

#echo "Messpunkt:                $zeit\n";
#echo "Himmelstemperatur:        $obj C\n";
#echo "Umgebungstemperature:     $amb C\n";
#echo "delta T:                  $deltat C\n";
#echo "Beleuchtung:              $illuminance Lux\n";


#echo "\n\n";

# Aufbau des Update-Strings fuer die RRD
$RRDString = "/usr/bin/rrdtool update $RRDB N:$obj:$amb:$deltat:$illuminance:U \n";

# RRD als Shell-Befehl updaten
$command = "$RRDString\n ";   
$output = shell_exec($command);
echo "$output \n";


#echo "$RRDString\n";

# Grafik generieren
$GGen = "/usr/bin/rrdtool graph /srv/scripts/astrowetter/astrowetter.png -s -1d -e +1h -w 600 -h 400 --vertical-label \"C\"";
$GGen = "$GGen DEF:CLOUD=/srv/scripts/astrowetter/astrowetter.rrd:t_delta:AVERAGE LINE2:CLOUD#009900:\"Delta T\"";
$GGen = "$GGen DEF:SKY=/srv/scripts/astrowetter/astrowetter.rrd:t_sky:AVERAGE LINE2:SKY#ff0000:\"Himmel (IR Messung)\"";
$GGen = "$GGen DEF:AMBIENT=/srv/scripts/astrowetter/astrowetter.rrd:t_ambient:AVERAGE LINE2:AMBIENT#0000ff:\"Umgebung\"";
$GGen = "$GGen \n";
$output = shell_exec($GGen);
echo "$output \n";


#$command = "echo $zeit, $obj, $amb, $deltat >> /srv/scripts/astrowetter/skylog.txt";
#$output = shell_exec($command);
#echo "$output \n";


$ipcon->destroy();

?>




########## Auslesen der RRDB von der Kommandozeile #########

rrdtool fetch astrowetter.rrd AVERAGE -r 300 -s -1h
t_sky           t_ambient             t_delta               light            humidity

1343906700: 2,0193501433e+01 2,8998700287e+01 -8,8051988533e+00 8,6738700287e+02 -nan
1343907000: 1,9503004948e+01 2,9199141443e+01 -9,6961364950e+00 8,6919227299e+02 -nan
1343907300: 2,0890644225e+01 2,9398663461e+01 -8,5080192360e+00 8,6810735097e+02 -nan
1343907600: 2,1794899409e+01 2,9400000000e+01 -7,6051005910e+00 8,6710566732e+02 -nan
1343907900: 2,2297787795e+01 2,9200884882e+01 -6,9030970870e+00 7,9760882382e+02 -nan
1343908200: -nan -nan -nan -nan -nan
1343908500: -nan -nan -nan -nan -nan
1343908800: -nan -nan -nan -nan -nan
1343909100: -nan -nan -nan -nan -nan
1343909400: 1,8990025381e+01 2,2987925462e+01 -3,9979000803e+00 4,8884323231e+02 -nan
1343909700: 1,8900617471e+01 2,2403704826e+01 -3,5030873550e+00 8,6148633616e+02 -nan
1343910000: 1,8402906802e+01 2,2598837279e+01 -4,1959304777e+00 8,6688197783e+02 -nan
1343910300: -nan -nan -nan -nan -nan