librenms-librenms/includes/polling/os/unifi.inc.php

<?php
$data = snmp_get_multi($device, 'dot11manufacturerProductName.2 dot11manufacturerProductVersion.2', '-OQUs', 'IEEE802dot11-MIB');
if (empty($data)) {
    $data = snmp_get_multi($device, 'dot11manufacturerProductName.3 dot11manufacturerProductVersion.3', '-OQUs', 'IEEE802dot11-MIB');
}

if (empty($data)) {
    $data = snmp_get_multi($device, 'dot11manufacturerProductName.4 dot11manufacturerProductVersion.4', '-OQUs', 'IEEE802dot11-MIB');
}

if (empty($data)) {
    $data = snmp_get_multi($device, 'dot11manufacturerProductName.5 dot11manufacturerProductVersion.5', '-OQUs', 'IEEE802dot11-MIB');
}

if (empty($data)) {
    $data = snmp_get_multi($device, 'dot11manufacturerProductName.6 dot11manufacturerProductVersion.6', '-OQUs', 'IEEE802dot11-MIB');
}

foreach ($data as $line) {
    if (!empty($line['dot11manufacturerProductName'])) {
        $hardware = $line['dot11manufacturerProductName'];
    }

    if (preg_match('/(v[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)/', $line['dot11manufacturerProductVersion'], $matches)) {
        $version = $matches[0];
    }
}