Adding a webpage for quick viewing

I created (or rather modified one I did for the DHT22 sensor readings) for seeing the latest an recent history of readings. It's ment to be placed within the parent directory of the php and logfiles directories. It still needs to be cleaned up a bit but it works:

<?php


$avg_temp=0;
$avg_humidity=0;

$avg_temp2=0;
$avg_humidity2=0;

$count = 0;
$csv_array=[];

$file1 = '/var/www/html/sensorlogging/logfiles/rsensor_ds18b20_d.csv';
$totallines =intval(exec('wc -l '.escapeshellarg($file1) . ' 2>/dev/null'));

$file2 ='/var/www/html/sensorlogging/logfiles/rsensor_dht22_e_1.csv';
$totallines2 = intval(exec('wc -l '.escapeshellarg($file2) . ' 2>/dev/null'));

if ($totallines >= 40){
if (($csv = new SplFileObject('logfiles/rsensor_ds18b20_d.csv', 'r')) !== FALSE){

$csv->seek(PHP_INT_MAX);
$last_line=$csv->key();

$lines = new LimitIterator($csv,$last_line - 40,$last_line);
$csv = null;
$count = 0;
//print_r(iterator_to_array($lines));
$lines_array = iterator_to_array($lines);
$lines_array = array_values($lines_array);

$csv_lines_parsed=[];
while($count < 40){
$scv_lines_parsed[]=str_getcsv($lines_array[$count],',');
$count++;

}

//echo "<pre>";
//var_dump($scv_lines_parsed);
//echo "</pre>";


$count =20;
echo '<!DOCTYPE html>' . "\r\n";
echo '<html>' . "\r\n";
echo '<head>' . "\r\n";
echo '<link href="main.css" rel="stylesheet" type="text/css">' . "\r\n";
echo '</head>' . "\r\n";
echo '<body>' . "\r\n";

echo '<table><caption>DS18b20 remote sensors last 20 readings</caption>' . "\r\n";
echo '<tr><th>date</th><th>time</th><th>Attic temp</th><th>Indoor temp</th></tr>' . "\r\n";

while($count < 40){
echo '<tr>';
echo '<td>' . print_r($scv_lines_parsed[$count][0], true) . '</td>';
echo '<td>' . print_r($scv_lines_parsed[$count][1], true) . '</td>';
echo '<td>' . print_r($scv_lines_parsed[$count][2], true) . '</td>';
echo '<td>' . print_r($scv_lines_parsed[$count][3], true) . '</td></tr>' . "\r\n";
$count++;
}

echo '</table>' . '<br>' ."\r\n";

$count = 0;
while($count < 40){
$avg_temp=$avg_temp+floatval($scv_lines_parsed[$count][3]);
$avg_humidity=$avg_humidity+floatval($scv_lines_parsed[$count][2]);
$count++;
}
$avg_temp=$avg_temp/40;
$avg_humidity=$avg_humidity/40;


echo '<table><caption>10 minute average</caption>' . "\r\n";
echo '<tr><th>Attic temp</th><th>Indoor temp</th></tr>' . "\r\n";
echo '<tr><td>' . $avg_humidity . '</td><td>' . $avg_temp . '</td></tr></table>';


//echo $avg_humidity . ',' . $avg_temp;

echo '</body>' . "\r\n";
echo '</html>' . "\r\n";

}
}

else {
echo "Not enough data yet to generate stats, please try again later.";

}

?>

Overall I haven't been too satisfied with DHT22 sensors, looking for a better alternative

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