display warning

src/app/modules/overview/overall-ground/overall-ground.component.ts

   private statusSubscription?: Subscription;
   private messageSubscription?: Subscription;
   private intervalId: any;
-
+  isShowingToastr: boolean = false;
 
   constructor(
     private socketService$: SocketService,
 
       this.Sstate1 = this.state1 === 'ON';// alarm 12h
       this.Sstate2 = this.state2 === 'ON';// alarm 1h
-      if (message.ready === '0'){
-        this.toastr.warning('System not ready', 'Warning', {timeOut: 5000});
-      }
+      this.handleMessage(message);
+    }
+  }
+
+  handleMessage(message: any) {
+    if (message.ready === '0' && !this.isShowingToastr) {
+      this.showToastr();
     }
   }
 
+  showToastr() {
+    this.toastr.warning('System not ready', 'Warning', { timeOut: 5000 });
+    this.isShowingToastr = true;
+    setTimeout(() => {
+      this.isShowingToastr = false;
+    }, 5000);
+  }
 }