librenms-librenms/includes/discovery/sensors/charge/apc.inc.php

<?php

$oids = snmp_get($device, '.1.3.6.1.4.1.318.1.1.1.2.3.1.0', '-OsqnU');
d_echo($oids."\n");

// Try High-Precision First
if (!empty($oids)) {
    echo 'APC UPS Battery Charge High Precision';
    $type               = 'apc';
    list($oid,$current) = explode(' ', $oids);

    $precision   = 10;
    $sensorType  = 'apc';
    $current_oid = '.1.3.6.1.4.1.318.1.1.1.2.3.1.0';
    $index       = 0;
    $current_val = ($current / $precision);
    $limit       = 100;
    $lowlimit    = 0;
    $warnlimit   = 10;
    $descr       = 'Battery Charge';

    discover_sensor($valid['sensor'], 'charge', $device, $current_oid, $index, $sensorType, $descr, $precision, 1, $lowlimit, $warnlimit, null, $limit, $current_val);
} else {
    // Try to just get capacity
    $oids = snmp_get($device, '.1.3.6.1.4.1.318.1.1.1.2.2.1.0', '-OsqnU');
    d_echo($oids."\n");

    if (!empty($oids)) {
        echo 'APC UPS Battery Charge';
        $type               = 'apc';
        list($oid,$current) = explode(' ', $oids);

        $precision   = 1;
        $sensorType  = 'apc';
        $current_oid = '.1.3.6.1.4.1.318.1.1.1.2.2.1.0';
        $index       = 0;
        $current_val = $current;
        $limit       = 100;
        $lowlimit    = 0;
        $warnlimit   = 10;
        $descr       = 'Battery Charge';

        discover_sensor($valid['sensor'], 'charge', $device, $current_oid, $index, $sensorType, $descr, $precision, 1, $lowlimit, $warnlimit, null, $limit, $current_val);
    }
}//end if