digitemp-rrdgraph/sbin/update.php

<?php

define('APPDIR', dirname(__DIR__));

require_once APPDIR.'/vendor/autoload.php';

$config = json_decode(file_get_contents(APPDIR.'/etc/config.json'), true);

$digitemp = new \Orrisroot\DigiTemp($config['digitemp'], APPDIR.'/'.$config['digitemp_config']);
$rrdtemp = new \Orrisroot\Rrd\Temperature(APPDIR.'/'.$config['database_dir']);
$num = $digitemp->getNumSensors();
for ($i = 0; $i < $num; ++$i) {
    $id = $digitemp->getSensorId($i);
    $value = $digitemp->readSensor($i);
    $rrdtemp->addSensor($id);
    $now = time();
    $rrdtemp->update($id, $now, $value);
}
$types = [
    'hour' => [1, 3, 6, 12],
    'day' => [1, 3],
    'week' => [1, 2],
    'month' => [1, 3, 6],
    'year' => [1, 3, 5, 10],
];
foreach ($types as $type => $nums) {
    foreach ($nums as $num) {
        $fpath = APPDIR.'/'.$config['images_dir'].'/graph-'.(1 === $num ? '' : $num).$type.'.png';
        $rrdtemp->outputGraph($type, $num, $fpath);
    }
}