diff --git a/Dashboard/src/redux/middlewares/serialConnection.ts b/Dashboard/src/redux/middlewares/serialConnection.ts
index 65ae43a..faf995d 100644
--- a/Dashboard/src/redux/middlewares/serialConnection.ts
+++ b/Dashboard/src/redux/middlewares/serialConnection.ts
@@ -1,27 +1,47 @@
 import { Middleware, Action } from "@reduxjs/toolkit";
 import { RootState } from "../store/types.d";
 import {
-  connect, disconnect, setSerialPort, setMessage, sendMessage,
+  connect, disconnect, setSerialPort, setMessage, sendMessage, connectionStart, connectionFailure, connectionSuccess, connectionEnd,
 } from "../slices/serialConnectionSlice";
 import PortController from "../../serial/PortController";
-import store from "../store";
 
 let serialPort: PortController|null = null;
-const errorCalbackHandler = () => {};
-const closeCalbackHandler = () => {};
-const serialDataListener = (msg: string) => { store.dispatch(setMessage(msg)); };
 
-const serialConnection: Middleware<{}, RootState> = () => (next) => (action: Action) => {
+const serialConnection: Middleware<{}, RootState> = (state) => (next) => (action: Action) => {
+  const errorCalbackHandler = (error: Error | null | undefined) => {
+    if (error === null || error === undefined) {
+      state.dispatch(connectionSuccess());
+    } else {
+      state.dispatch(connectionFailure(error.message));
+    }
+  };
+  const closeCalbackHandler = (error: Error | null | undefined) => {
+    if (error !== null && error !== undefined) {
+      if (error.message === "Reading from COM port (ReadIOCompletion): Access denied") {
+        state.dispatch(connectionFailure(`Device ${state.getState().serialConnection.port} disconnected`));
+        state.dispatch(connectionEnd());
+      }
+    }
+  };
+  const serialDataListener = (msg: string) => {
+    if (msg !== state.getState().serialConnection.message) {
+      state.dispatch(setMessage(msg));
+    }
+  };
+
   if (connect.match(action)) {
+    state.dispatch(connectionStart());
+    if (state.getState().serialConnection.port === "") {
+      state.dispatch(connectionFailure("No Serial Port set"));
+      return next(action);
+    }
     serialPort?.open(errorCalbackHandler, closeCalbackHandler);
     serialPort?.parser.on("data", serialDataListener);
-    console.log("connect");
   } else if (disconnect.match(action)) {
     serialPort?.close();
-    console.log("disconnect");
+    state.dispatch(connectionEnd());
   } else if (setSerialPort.match(action)) {
     serialPort = new PortController(action.payload);
-    console.log("setSerialPort");
   } else if (sendMessage.match(action)) {
     serialPort?.write(action.payload);
   }