<?php
require __DIR__ . '/../vendor/autoload.php';

use PHPModbus\ModbusMaster;

$ip = filter_var($_GET['ip'], FILTER_VALIDATE_IP) ? $_GET['ip'] : '192.192.15.51';
$unitId = ((int)$_GET['unitid']) ?: 0;
$reference = ((int)$_GET['reference']) ?: 12288;
$quantity = ((int)$_GET['quantity']) ?: 12;

$modbus = new ModbusMaster($ip, 'UDP');

try {
	// FC 1
	$recData = $modbus->readCoils($unitId, $reference, $quantity);
} catch (Exception $e) {
	// Print error information if any
	echo $modbus;
	echo $e;
	exit;
}

echo '<h1>Status</h1><pre>';
print_r($modbus);
echo '</pre>';
echo '<h1>Data</h1><pre>';
print_r($recData);
echo '</pre>';