diff --git a/app/src/main/java/com/yinuo/safetywatcher/watcher/utils/LztekUtil.kt b/app/src/main/java/com/yinuo/safetywatcher/watcher/utils/LztekUtil.kt
index f15aded..c6f1078 100644
--- a/app/src/main/java/com/yinuo/safetywatcher/watcher/utils/LztekUtil.kt
+++ b/app/src/main/java/com/yinuo/safetywatcher/watcher/utils/LztekUtil.kt
@@ -104,16 +104,21 @@ object LztekUtil {
         return linkOpen
     }
 
+    var hasWarning = false
     fun openLinkI0() {
+        hasWarning = true
         if (isLinkSwitchOpen()) {
             GlobalScope.launch(Dispatchers.IO) {
                 delay(mLinkDelay * 1000L)
-                GPIOUtils.setGpioValue(11, 1)
+                if (isLinkSwitchOpen() && hasWarning) {
+                    GPIOUtils.setGpioValue(11, 1)
+                }
             }
         }
     }
 
     fun closeLinkIO() {
+        hasWarning = false
         if (isLinkSwitchOpen()) {
             GPIOUtils.setGpioValue(11, 0)
         }