From bcb04087016ea55190c7895173b02ae204b3928a Mon Sep 17 00:00:00 2001
From: Stepan <stepan.novikov@arsjp.com>
Date: Fri, 28 Mar 2025 16:42:18 +0900
Subject: [PATCH] Windows: added a check for \\.\ prefix

---
 serial_windows.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/serial_windows.go b/serial_windows.go
index 445430d..7aa0123 100644
--- a/serial_windows.go
+++ b/serial_windows.go
@@ -19,6 +19,7 @@ package serial
 
 import (
 	"errors"
+	"strings"
 	"sync"
 	"syscall"
 	"time"
@@ -352,7 +353,9 @@ func createOverlappedEvent() (*windows.Overlapped, error) {
 }
 
 func nativeOpen(portName string, mode *Mode) (*windowsPort, error) {
-	portName = "\\\\.\\" + portName
+	if !strings.HasPrefix(portName, `\\.\`) {
+		portName = `\\.\` + portName
+	}
 	path, err := windows.UTF16PtrFromString(portName)
 	if err != nil {
 		return nil, err