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app/Services/SerialCommunicationService.php

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+<?php
+
+namespace App\Services;
+use Carbon\Carbon;
+use Fawno\PhpSerial\SerialDio;
+use Fawno\PhpSerial\SerialConfig;
+class SerialCommunicationService
+{
+    public function sendMessageDevice1($message, $port = 'COM2')
+    {
+        $config     = new SerialConfig();
+        $config->setBaudRate(9600);
+        $config->setParity(0);
+        $config->setDataBits(8);
+        $config->setStopBits(1);
+        $config->setFlowControl(0);
+        $serial     = new SerialDio($port, $config);
+        $serial->open('r+b');
+        $serial->setBlocking(0);
+        $serial->setTimeout(0, 0);
+        $serial->send($message);
+        $pesan      = $serial->read();
+        $serial->close();
+        return $pesan;
+    }
+}