From cf1e28ccd590820c9dfc8e3db340e0a1df2fb8fd Mon Sep 17 00:00:00 2001
From: taylorza <chris_taylor_za@hotmail.com>
Date: Mon, 16 Jan 2023 20:35:33 -0500
Subject: [PATCH] Fixed null reference issues

---
 UARTReplacement/SerialPort.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/UARTReplacement/SerialPort.cs b/UARTReplacement/SerialPort.cs
index 07126d8..69a4e3b 100644
--- a/UARTReplacement/SerialPort.cs
+++ b/UARTReplacement/SerialPort.cs
@@ -193,6 +193,7 @@ public int Baud
 
         public void Reset(byte ResetByte)
         {
+            if (port is null) return;
             // bit 7 = Indicates the reset signal to the expansion bus and esp is asserted
             bool resetESP = (ResetByte & 128) == 128;
             if (resetESP)
@@ -216,7 +217,7 @@ public void EnableEspGpio(byte EnableByte)
 
         public void SetEspGpio(byte GpioByte)
         {
-            if (enableEspGpio)
+            if (enableEspGpio || port is null)
                 return;
 
             // bit 0 = Read / Write ESP GPIO0 (hard reset = 1)