diff --git a/src/main/java/com/xydl/cac/serialport/SerialPortServer.java b/src/main/java/com/xydl/cac/serialport/SerialPortServer.java
index 91356e5..1fbd079 100644
--- a/src/main/java/com/xydl/cac/serialport/SerialPortServer.java
+++ b/src/main/java/com/xydl/cac/serialport/SerialPortServer.java
@@ -1,6 +1,7 @@
 package com.xydl.cac.serialport;
 
 import com.fazecast.jSerialComm.SerialPort;
+import com.xydl.cac.model.StaticVariable;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.scheduling.annotation.Async;
@@ -80,14 +81,17 @@ public class SerialPortServer {
                     }
                     LastWarningTime = l;
                     port.writeBytes(openbuffer, openbuffer.length);
-                    try {
-                        Thread.sleep(warntime * 1000);
-                    } catch (InterruptedException e) {
-                        e.printStackTrace();
-                    } finally {
-                        port.writeBytes(stopbuffer, stopbuffer.length);
-                        started = false;
+                    int seconds = 0;
+                    while (StaticVariable.shutdown == 0 && seconds > warntime) {
+                        try {
+                            Thread.sleep(1000);
+                            seconds++;
+                        } catch (Exception ignore) {
+                            port.writeBytes(stopbuffer, stopbuffer.length);
+                            started = false;
+                        }
                     }
+                    port.writeBytes(stopbuffer, stopbuffer.length);
                 }
             }
             started = false;