From 548d7da9cd85c9eb5fd293fa54cdd0e1ac78d86f Mon Sep 17 00:00:00 2001
From: luosheng <parallelbgls@outlook.com>
Date: Mon, 17 Jul 2023 17:57:29 +0800
Subject: [PATCH] Fix

---
 Modbus.Net/Modbus.Net/Controller/BaseController.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Modbus.Net/Modbus.Net/Controller/BaseController.cs b/Modbus.Net/Modbus.Net/Controller/BaseController.cs
index e33b5ff..c2491bc 100644
--- a/Modbus.Net/Modbus.Net/Controller/BaseController.cs
+++ b/Modbus.Net/Modbus.Net/Controller/BaseController.cs
@@ -76,7 +76,7 @@ namespace Modbus.Net
         /// <inheritdoc />
         public virtual void SendStart()
         {
-            if (SendingThread == null)
+            if (!IsSending)
             {
                 SendingThread = Task.Run(() => SendingMessageControlInner());
             }