diff --git a/electron/src/app.module.ts b/electron/src/app.module.ts
index f6134b99..68d01baf 100644
--- a/electron/src/app.module.ts
+++ b/electron/src/app.module.ts
@@ -10,6 +10,7 @@ import { StoreLogMonitorModule, useLogMonitor } from '@ngrx/store-log-monitor';
 import { DragulaModule } from 'ng2-dragula/ng2-dragula';
 import { Select2Module } from 'ng2-select2/ng2-select2';
 
+import { MissingDeviceComponent } from './components/missing-device/missing-device.component';
 import { AddOnComponent } from './shared/components/add-on';
 import { KeyboardSliderComponent } from './shared/components/keyboard/slider';
 import { KeymapAddComponent, KeymapHeaderComponent } from './shared/components/keymap';
@@ -59,7 +60,9 @@ import {
 } from './shared/components/svg/keys';
 import { SvgModuleComponent } from './shared/components/svg/module';
 import { SvgKeyboardWrapComponent } from './shared/components/svg/wrap';
-import { MainAppComponent, appRoutingProviders, routing } from './main-app';
+import { appRoutingProviders, routing } from './app/app.routes';
+import { AppComponent } from './app/app.component';
+import { MainAppComponent } from './main-app';
 
 import { CancelableDirective } from './shared/directives';
 
@@ -74,6 +77,8 @@ import { DataStorage } from './shared/store/storage';
 import { KeymapEditGuard } from './shared/components/keymap/edit';
 import { MacroNotFoundGuard } from './shared/components/macro/not-found';
 
+import { UHkConnectedGuard } from './services/uhk-connected.guard';
+
 // Create DataStorage dependency injection
 const storageProvider = ReflectiveInjector.resolve([DataStorage]);
 const storageInjector = ReflectiveInjector.fromResolvedProviders(storageProvider);
@@ -87,6 +92,7 @@ const storeConfig = {
 
 @NgModule({
     declarations: [
+        AppComponent,
         MainAppComponent,
         KeymapEditComponent,
         KeymapHeaderComponent,
@@ -133,6 +139,7 @@ const storeConfig = {
         AddOnComponent,
         SettingsComponent,
         KeyboardSliderComponent,
+        MissingDeviceComponent,
         CancelableDirective
     ],
     imports: [
@@ -153,6 +160,7 @@ const storeConfig = {
         EffectsModule.runAfterBootstrap(MacroEffects)
     ],
     providers: [
+        UHkConnectedGuard,
         MapperService,
         appRoutingProviders,
         KeymapEditGuard,
@@ -160,6 +168,6 @@ const storeConfig = {
         CaptureService,
         UhkDeviceService
     ],
-    bootstrap: [MainAppComponent]
+    bootstrap: [AppComponent]
 })
 export class AppModule { }
diff --git a/electron/src/app/app.component.html b/electron/src/app/app.component.html
new file mode 100644
index 00000000..0680b43f
--- /dev/null
+++ b/electron/src/app/app.component.html
@@ -0,0 +1 @@
+<router-outlet></router-outlet>
diff --git a/electron/src/app/app.component.scss b/electron/src/app/app.component.scss
new file mode 100644
index 00000000..418ad7b4
--- /dev/null
+++ b/electron/src/app/app.component.scss
@@ -0,0 +1,6 @@
+app {
+    display: block;
+    min-height: 100vh;
+    height: 100vh;
+    width: 100%;
+}
diff --git a/electron/src/app/app.component.ts b/electron/src/app/app.component.ts
new file mode 100644
index 00000000..ccce4074
--- /dev/null
+++ b/electron/src/app/app.component.ts
@@ -0,0 +1,9 @@
+import { Component, ViewEncapsulation } from '@angular/core';
+
+@Component({
+    selector: 'app',
+    templateUrl: 'app.component.html',
+    styleUrls: ['app.component.scss'],
+    encapsulation: ViewEncapsulation.None
+})
+export class AppComponent { }
diff --git a/electron/src/app/app.routes.ts b/electron/src/app/app.routes.ts
new file mode 100644
index 00000000..fccb65fc
--- /dev/null
+++ b/electron/src/app/app.routes.ts
@@ -0,0 +1,24 @@
+import { UHkConnectedGuard } from './../services/uhk-connected.guard';
+import { ModuleWithProviders } from '@angular/core';
+import { RouterModule, Routes } from '@angular/router';
+
+import { MissingDeviceComponent } from './../components/missing-device/missing-device.component';
+import { MainAppComponent } from './../main-app/main-app.component';
+import { mainAppRoutes } from './../main-app/main-app.routes';
+
+const appRoutes: Routes = [
+    {
+        path: 'detection',
+        component: MissingDeviceComponent
+    },
+    {
+        path: '',
+        component: MainAppComponent,
+        canActivate: [UHkConnectedGuard],
+        children: mainAppRoutes
+    }
+];
+
+export const appRoutingProviders: any[] = [];
+
+export const routing: ModuleWithProviders = RouterModule.forRoot(appRoutes, { useHash: true });
diff --git a/electron/src/app/index.ts b/electron/src/app/index.ts
new file mode 100644
index 00000000..df2f2075
--- /dev/null
+++ b/electron/src/app/index.ts
@@ -0,0 +1 @@
+export * from './app.component';
diff --git a/electron/src/components/keymap/keymap.routes.ts b/electron/src/components/keymap/keymap.routes.ts
index 7df02708..013682f7 100644
--- a/electron/src/components/keymap/keymap.routes.ts
+++ b/electron/src/components/keymap/keymap.routes.ts
@@ -7,7 +7,7 @@ import { KeymapEditGuard } from '../../shared/components/keymap/edit';
 export const keymapRoutes: Routes = [
     {
         path: '',
-        redirectTo: '/keymap',
+        redirectTo: 'keymap',
         pathMatch: 'full'
     },
     {
diff --git a/electron/src/components/missing-device/index.ts b/electron/src/components/missing-device/index.ts
new file mode 100644
index 00000000..3672a855
--- /dev/null
+++ b/electron/src/components/missing-device/index.ts
@@ -0,0 +1 @@
+export * from './missing-device.component';
diff --git a/electron/src/components/missing-device/missing-device.component.html b/electron/src/components/missing-device/missing-device.component.html
new file mode 100644
index 00000000..55a0fef0
--- /dev/null
+++ b/electron/src/components/missing-device/missing-device.component.html
@@ -0,0 +1,7 @@
+<span class="missing-device-wrapper">
+    <img class="agent-logo" src="images/agent-icon.png"/>
+    <div class="messages">
+        <h1> Cannot find your UHK </h1>
+        <h2> Please plug it in! </h2>
+    </div>
+</span>
diff --git a/electron/src/components/missing-device/missing-device.component.scss b/electron/src/components/missing-device/missing-device.component.scss
new file mode 100644
index 00000000..3a204fa2
--- /dev/null
+++ b/electron/src/components/missing-device/missing-device.component.scss
@@ -0,0 +1,19 @@
+.missing-device-wrapper {
+    display: flex;
+    height: 100%;
+    align-items: center;
+    justify-content: center;
+}
+
+.agent-logo {
+    padding: 2em;
+}
+
+.message {
+    display: flex;
+    flex-direction: column;
+
+    > h2 {
+        margin-top: 10px;
+    }
+}
diff --git a/electron/src/components/missing-device/missing-device.component.ts b/electron/src/components/missing-device/missing-device.component.ts
new file mode 100644
index 00000000..14a9ed77
--- /dev/null
+++ b/electron/src/components/missing-device/missing-device.component.ts
@@ -0,0 +1,29 @@
+import { Component } from '@angular/core';
+import { Router } from '@angular/router';
+
+import { Observable } from 'rxjs/Observable';
+import 'rxjs/add/operator/distinctUntilChanged';
+import 'rxjs/add/operator/ignoreElements';
+import 'rxjs/add/operator/takeWhile';
+
+import { UhkDeviceService } from './../../services/uhk-device.service';
+
+@Component({
+    selector: 'missing-device',
+    templateUrl: 'missing-device.component.html',
+    styleUrls: ['missing-device.component.scss']
+})
+export class MissingDeviceComponent {
+
+    constructor(uhkDevice: UhkDeviceService, router: Router) {
+        uhkDevice.isConnected()
+            .distinctUntilChanged()
+            .takeWhile(connected => !connected)
+            .ignoreElements()
+            .subscribe({
+                complete: () => {
+                    router.navigate(['/']);
+                }
+            });
+    }
+}
diff --git a/electron/src/index.html b/electron/src/index.html
index 9196967c..e9fa1032 100644
--- a/electron/src/index.html
+++ b/electron/src/index.html
@@ -27,7 +27,7 @@ j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
         </script>
         <!-- End Google Tag Manager -->
 
-        <main-app></main-app>
+        <app></app>
 
         <script src="app.uhk.js"></script> <!-- This should be moved to the head -->
     </body>
diff --git a/electron/src/main-app/main-app.component.ts b/electron/src/main-app/main-app.component.ts
index 46983280..8ab63457 100644
--- a/electron/src/main-app/main-app.component.ts
+++ b/electron/src/main-app/main-app.component.ts
@@ -1,7 +1,12 @@
 import { Component, ViewEncapsulation, HostListener } from '@angular/core';
+import { Router } from '@angular/router';
 
 import { Store } from '@ngrx/store';
 
+import 'rxjs/add/operator/distinctUntilChanged';
+import 'rxjs/add/operator/ignoreElements';
+import 'rxjs/add/operator/takeWhile';
+
 import { AppState } from '../shared/store';
 import { getUserConfiguration } from '../shared/store/reducers/user-configuration';
 
@@ -17,7 +22,17 @@ import { UhkDeviceService } from '../services/uhk-device.service';
 })
 export class MainAppComponent {
 
-    constructor(private uhkDevice: UhkDeviceService, private store: Store<AppState>) { }
+    constructor(private uhkDevice: UhkDeviceService, private store: Store<AppState>, router: Router) {
+        uhkDevice.isConnected()
+            .distinctUntilChanged()
+            .takeWhile(connected => connected)
+            .ignoreElements()
+            .subscribe({
+                complete: () => {
+                    router.navigate(['/detection']);
+                }
+            });
+    }
 
     @HostListener('window:keydown.control.o', ['$event'])
     onCtrlO(event: KeyboardEvent): void {
diff --git a/electron/src/main-app/main-app.routes.ts b/electron/src/main-app/main-app.routes.ts
index 3decdd8b..3ebb976a 100644
--- a/electron/src/main-app/main-app.routes.ts
+++ b/electron/src/main-app/main-app.routes.ts
@@ -1,18 +1,13 @@
-import { ModuleWithProviders } from '@angular/core';
-import { RouterModule, Routes }  from '@angular/router';
+import { Routes } from '@angular/router';
 
 import { addOnRoutes } from '../shared/components/add-on';
 import { keymapRoutes } from '../components/keymap';
 import { macroRoutes } from '../shared/components/macro';
 import { settingsRoutes } from '../shared/components/settings';
 
-const appRoutes: Routes = [
+export const mainAppRoutes: Routes = [
     ...keymapRoutes,
     ...macroRoutes,
     ...addOnRoutes,
     ...settingsRoutes
 ];
-
-export const appRoutingProviders: any[] = [ ];
-
-export const routing: ModuleWithProviders =  RouterModule.forRoot(appRoutes, { useHash: true });
diff --git a/electron/src/services/uhk-connected.guard.ts b/electron/src/services/uhk-connected.guard.ts
new file mode 100644
index 00000000..17b7887a
--- /dev/null
+++ b/electron/src/services/uhk-connected.guard.ts
@@ -0,0 +1,24 @@
+import { CanActivate, Router } from '@angular/router';
+import { Injectable } from '@angular/core';
+
+import { Observable } from 'rxjs/Observable';
+import 'rxjs/add/operator/do';
+import 'rxjs/add/operator/first';
+
+import { UhkDeviceService } from './uhk-device.service';
+
+@Injectable()
+export class UHkConnectedGuard implements CanActivate {
+
+    constructor(private uhkDevice: UhkDeviceService, private router: Router) { }
+
+    canActivate(): Observable<boolean> {
+        return this.uhkDevice.isConnected()
+            .first()
+            .do(connected => {
+                if (!connected) {
+                    return this.router.navigate(['/detection']);
+                }
+            });
+    }
+}
diff --git a/electron/src/services/uhk-device.service.ts b/electron/src/services/uhk-device.service.ts
index da996fc2..fb3422bd 100644
--- a/electron/src/services/uhk-device.service.ts
+++ b/electron/src/services/uhk-device.service.ts
@@ -1,5 +1,6 @@
-import { Injectable } from '@angular/core';
+import { Injectable, OnDestroy, NgZone } from '@angular/core';
 import { Observable } from 'rxjs/Observable';
+import { BehaviorSubject } from 'rxjs/BehaviorSubject';
 import { Observer } from 'rxjs/Observer';
 import { ConnectableObservable } from 'rxjs/observable/ConnectableObservable';
 import { Subject } from 'rxjs/Subject';
@@ -14,7 +15,7 @@ import 'rxjs/add/operator/concatMap';
 import 'rxjs/add/operator/mergeMap';
 import 'rxjs/add/operator/publish';
 
-import { Device, Interface, InEndpoint, OutEndpoint, findByIds } from 'usb';
+import { Device, Interface, InEndpoint, OutEndpoint, findByIds, on } from 'usb';
 
 import { Layer } from '../shared/config-serializer/config-items/Layer';
 import { UhkBuffer } from '../shared/config-serializer/UhkBuffer';
@@ -34,28 +35,38 @@ interface SenderMessage {
 };
 
 @Injectable()
-export class UhkDeviceService {
+export class UhkDeviceService implements OnDestroy {
 
     private device: Device;
-    private connected: boolean;
+    private connected$: BehaviorSubject<boolean>;
 
     private messageIn$: Observable<Buffer>;
     private messageOut$: Subject<SenderMessage>;
 
     private outSubscription: Subscription;
 
-    constructor() {
+    constructor(zone: NgZone) {
         this.messageOut$ = new Subject<SenderMessage>();
+        this.connected$ = new BehaviorSubject(false);
         this.connect();
+
+        // The change detection doesn't work properly if the callbacks are called outside Angular Zone
+        on('attach', (device: Device) => zone.run(() => this.onDeviceAttach(device)));
+        on('detach', (device: Device) => zone.run(() => this.onDeviceDetach(device)));
+    }
+
+    ngOnDestroy() {
+        this.disconnect();
+        this.connected$.unsubscribe();
     }
 
     connect(): void {
-        if (this.connected) {
+        if (this.connected$.getValue()) {
             return;
         }
         this.device = findByIds(vendorId, productId);
         if (!this.device) {
-            throw new Error('UhkDevice not found.');
+            return;
         }
         this.device.open();
 
@@ -103,18 +114,20 @@ export class UhkDeviceService {
         }).publish();
         this.outSubscription = outSending.connect();
 
-        this.connected = true;
+        this.connected$.next(true);
     }
 
     disconnect() {
-        if (!this.connected) {
+        if (!this.connected$.getValue()) {
             return;
         }
         this.outSubscription.unsubscribe();
         this.messageIn$ = undefined;
-        this.device.interface(0).release();
-        this.device.close();
-        this.connected = false;
+        this.connected$.next(false);
+    }
+
+    isConnected(): Observable<boolean> {
+        return this.connected$.asObservable();
     }
 
     sendConfig(configBuffer: Buffer): Observable<Buffer> {
@@ -159,4 +172,22 @@ export class UhkDeviceService {
         });
     }
 
+    onDeviceAttach(device: Device) {
+        if (device.deviceDescriptor.idVendor !== vendorId || device.deviceDescriptor.idProduct !== productId) {
+            return;
+        }
+        if (!this.connected$.getValue()) {
+            this.connect();
+        }
+    }
+
+    onDeviceDetach(device: Device) {
+        if (device.deviceDescriptor.idVendor !== vendorId || device.deviceDescriptor.idProduct !== productId) {
+            return;
+        }
+        if (this.connected$.getValue()) {
+            this.disconnect();
+        }
+    }
+
 }
diff --git a/shared/src/main-app/main-app.component.scss b/shared/src/main-app/main-app.component.scss
index 84412b34..afd48d6e 100644
--- a/shared/src/main-app/main-app.component.scss
+++ b/shared/src/main-app/main-app.component.scss
@@ -1,13 +1,11 @@
 main-app {
     display: block;
-    min-height: 100vh;
-    width: 100%;
     overflow: hidden;
     position: relative;
+}
 
-    .select2-container--default .select2-selection--single .select2-selection__rendered {
-        line-height: 26px;
-    }
+.select2-container--default .select2-selection--single .select2-selection__rendered {
+    line-height: 26px;
 }
 
 .main-content {
diff --git a/web/src/main-app/main-app.component.scss b/web/src/main-app/main-app.component.scss
index 40dfa9a8..9f6eda12 100644
--- a/web/src/main-app/main-app.component.scss
+++ b/web/src/main-app/main-app.component.scss
@@ -30,3 +30,8 @@
         text-shadow: 0 0 5px #444;
     }
 }
+
+main-app {
+    min-height: 100vh;
+    width: 100%;
+}