diff --git a/Dashboard/src/PortController.ts b/Dashboard/src/PortController.ts
index 44ea6be..123d86d 100644
--- a/Dashboard/src/PortController.ts
+++ b/Dashboard/src/PortController.ts
@@ -32,7 +32,7 @@ class PortController {
     this.parser = this.port.pipe(new parsers.Readline({ delimiter: "\r\n" }));
   }
 
-  open(callback: (error:Error | null | undefined)=>void, onCloseCallback:(error:Error)=>void) {
+  open(callback: (error:Error | null | undefined)=>void, onCloseCallback:(error:Error | null | undefined)=>void) {
     if (this.isOpen) {
       throw new Error("Port already open");
     }
diff --git a/Dashboard/src/redux/actions/asyncSerialConnectionActions.ts b/Dashboard/src/redux/actions/asyncSerialConnectionActions.ts
index f241cdd..de2d6a5 100644
--- a/Dashboard/src/redux/actions/asyncSerialConnectionActions.ts
+++ b/Dashboard/src/redux/actions/asyncSerialConnectionActions.ts
@@ -25,9 +25,11 @@ const connect = (): ThunkResult<void> => async (dispatch, getState) => {
       dispatch(connectionFailure(error));
     }
   }, (error) => {
-    if (error.message === "Reading from COM port (ReadIOCompletion): Access denied") {
-      dispatch(connectionFailure(new Error("Device disconnected")));
-      dispatch(connectionEnd());
+    if (error !== null && error !== undefined) {
+      if (error.message === "Reading from COM port (ReadIOCompletion): Access denied") {
+        dispatch(connectionFailure(new Error(`Device ${state.serialConnection.port} disconnected`)));
+        dispatch(connectionEnd());
+      }
     }
   });
 };