diff --git a/modbus.pro.user b/modbus.pro.user
index a90843a..7a92d7f 100644
--- a/modbus.pro.user
+++ b/modbus.pro.user
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 4.0.3, 2025-07-25T10:54:01. -->
+<!-- Written by QtCreator 4.0.3, 2025-07-25T12:36:51. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>
diff --git a/widget.cpp b/widget.cpp
index 3eb3bf1..6cd13fb 100644
--- a/widget.cpp
+++ b/widget.cpp
@@ -7,6 +7,7 @@
 #include <QString>
 #include <QVector>
 #include <QMessageBox>
+#include <synchapi.h>
 #include "crc.h"
 
 Widget::Widget(QWidget *parent) :
@@ -150,6 +151,7 @@ void Widget::on_pushWrite_clicked()
     ui->textEdit_2->append("发送报文"+SendCommand.toHex().toUpper());
     serialPort->write(SendCommand);
 
+    Sleep(100);
     timer.isActive();
     timer.start(2000);   // 2 s 后触发超时
 
@@ -202,6 +204,7 @@ void Widget::on_pushWrite_clicked()
         ui->textEdit_2->append("发送报文"+SendCommand.toHex().toUpper());
         serialPort->write(SendCommand);
 
+        Sleep(100);
         timer.isActive();
         timer.start(2000);   // 2 s 后触发超时
 
@@ -353,6 +356,7 @@ void Widget::on_btn_read_clicked()
     {
         SendCommand.append(0x03);
     }
+
     SendCommand.append(ui->lineEdit_stratAddress->text().toInt()/256);  //加入起始地址
     SendCommand.append(ui->lineEdit_stratAddress->text().toInt()%256);
     SendCommand.append(ui->lineEdit_length->text().toInt()/256);        //加入长度
@@ -367,6 +371,7 @@ void Widget::on_btn_read_clicked()
     ui->textEdit_2->append("发送报文"+SendCommand.toHex().toUpper());
     serialPort->write(SendCommand);  //发送报文
 
+    Sleep(100);
     timer.isActive();
     timer.start(2000);   // 2 s 后触发超时
 }