Polling OS File
=========================================================================================
<?php

use LibreNMS\RRD\RrdDefinition;

$signal = snmp_get($device, '.1.3.6.1.4.1.14988.1.1.1.1.1.4.7', '-OQv', 'MIKROTIK-MIB');

if (is_numeric($signal)) {
    $rrd_def = RrdDefinition::make()->addDataset('quality', 'GAUGE', 0);

    $fields = array(
        'quality' => $signal,
    );

    $tags = compact('rrd_def');
    data_update($device, 'signal_quality', $tags, $fields);
    $graphs['signal_quality'] = true;
}


Device Graph File
======================================================================================
<?php

$rrd_filename = rrd_name($device['hostname'], 'signal_quality');

require 'includes/graphs/common.inc.php';

$ds = 'quality';

$colour_area = '9999cc';
$colour_line = '0000cc';

$colour_area_max = '9999cc';

$graph_max = 1;
$graph_min = 0;

$unit_text = 'Signal_Quality';

require 'includes/graphs/generic_simplex.inc.php';