diff --git a/src/pages/ota-wizard/ota-wizard.html b/src/pages/ota-wizard/ota-wizard.html
index 1a7604b..c3873d0 100644
--- a/src/pages/ota-wizard/ota-wizard.html
+++ b/src/pages/ota-wizard/ota-wizard.html
@@ -28,6 +28,7 @@
             <ul style="text-align: left">
               <li>has the <b>WiFi shield</b> plugged in</li>
               <li>has the initial <b>OTA sketch</b> installed</li>
+              <li>is running</li>
             </ul>
             <button ion-button large clear icon-end color="primary" (click)="slides.slideNext()">
               Continue
@@ -63,32 +64,83 @@
 
       <ng-container *ngIf="state.compilation == 'error'">
         <h2>Error compiling your sketch.</h2>
-        <!-- TODO <p>{{ status }}</p> -->
+        <p [innerHTML]="errorMsg"></p>
       </ng-container>
     </ion-slide>
 
+    <!-- wifi selection -->
     <ion-slide>
-      <h1>senseBox Wifi Selection</h1>
-      <pre style="text-align: left">
-        - Android
-          - select from list?
-            - highlight `sensebox-*` networks?
-            - filter by SSID name (`sensebox-*`)
-            - filter by distance?
-          - enter credentials (if necessary)
-          - background: connect to selected SSID
-        - iOS
-          - tell user to connect to `sensebox-*` SSID, and come back when done
-      </pre>
+      <ng-container *ngIf="state.wifiSelection == 'manual'">
+        <h2>Connect to your senseBox</h2>
+        <p>
+          Connect to the WiFi network that your senseBox has openened.
+          Because we can not do this automatically on your platform, please do this manually.
+        </p>
+      </ng-container>
+
+      <ion-grid *ngIf="state.wifiSelection != 'manual'">
+        <ion-row>
+          <ion-col col-12 col-md-6>
+            <ion-icon name="wifi" style="font-size: 160px"></ion-icon>
+            <h2>Select your senseBox</h2>
+            <p>
+              In the list, all running senseBoxes with OTA available are shown.
+              If you don't see yours, please make sure that it
+            </p>
+            <ul style="text-align: left">
+              <li>has the <b>WiFi shield</b> plugged in</li>
+              <li>has the initial <b>OTA sketch</b> installed</li>
+              <li>is running</li>
+            </ul>
+          </ion-col>
+
+          <ion-col col-12 col-md-6>
+            <h4>Available senseBox WiFis</h4>
+            <ion-list>
+              <ion-item *ngFor="let ssid of availableSenseboxes" (click)="connectToSensebox(ssid)">
+                <ion-icon name="wifi" item-start></ion-icon>
+                {{ ssid }}
+              </ion-item>
+
+              <ion-item *ngIf="state.wifiSelection == 'scanning'">
+                <ion-spinner item-start name="dots"></ion-spinner>
+                searching...
+              </ion-item>
+              <ion-item *ngIf="state.wifiSelection == 'selection' && !availableSenseboxes.length">
+                no senseboxes available :(
+              </ion-item>
+              <ion-item>
+                <ion-label>Show only senseBox WiFis</ion-label>
+                <!-- TODO: retrigger scan on toggle -->
+                <ion-toggle [(ngModel)]="filterSsids"></ion-toggle>
+              </ion-item>
+            </ion-list>
+
+            <ng-container *ngIf="state.wifiSelection == 'connecting'">
+                <ion-spinner item-start name="dots"></ion-spinner>
+                connecting...
+            </ng-container>
+
+            <ng-container *ngIf="state.wifiSelection == 'error'">
+              <h2>Error!</h2>
+              <p [innerHTML]="errorMsg"></p>
+            </ng-container>
+          </ion-col>
+        </ion-row>
+      </ion-grid>
+
     </ion-slide>
 
+    <!-- upload & final status -->
     <ion-slide>
-      <h1>Status Screen</h1>
-      <pre style="text-align: left">
+      <h2>Uploading your sketch</h2>
+      <ion-spinner item-start name="dots"></ion-spinner>
+
+      <!-- <pre style="text-align: left">
         - background: check if sensebox upload is available
         - show success or error
         - instructions to restart sensebox?
-      </pre>
+      </pre> -->
     </ion-slide>
 
   </ion-slides>
diff --git a/src/pages/ota-wizard/ota-wizard.scss b/src/pages/ota-wizard/ota-wizard.scss
index 8c17c18..0e7ffd2 100644
--- a/src/pages/ota-wizard/ota-wizard.scss
+++ b/src/pages/ota-wizard/ota-wizard.scss
@@ -6,6 +6,10 @@ page-ota-wizard {
   }
 
   ion-slide {
+    h4 {
+      margin-bottom: 40px;
+    }
+
     img {
       max-height: 50%;
       max-width: 60%;
diff --git a/src/pages/ota-wizard/ota-wizard.ts b/src/pages/ota-wizard/ota-wizard.ts
index 8f5f9cb..fb19ef4 100644
--- a/src/pages/ota-wizard/ota-wizard.ts
+++ b/src/pages/ota-wizard/ota-wizard.ts
@@ -23,12 +23,15 @@ export class OtaWizardPage implements OnInit, OnDestroy {
   onlineSub: Subscription
   offlineSub: Subscription
 
-  compilationFailed: boolean
+  filterSsids = false // TODO: add toggle to UI?
+  availableSenseboxes: string[] = [] // list of SSIDs
+  compiledSketch = undefined
+  errorMsg = ''
 
   state: OtaState = {
     isOnline: false,
-    compiledSketch: undefined,
     compilation: 'compiling',
+    wifiSelection: 'scanning',
   }
 
   constructor(
@@ -74,7 +77,8 @@ export class OtaWizardPage implements OnInit, OnDestroy {
         this.handleWifiSelection()
         break
 
-      case OtaSlides.Status:
+      case OtaSlides.Upload:
+        this.slides.lockSwipeToNext(true)
         break
 
       default:
@@ -82,11 +86,24 @@ export class OtaWizardPage implements OnInit, OnDestroy {
     }
   }
 
+  async connectToSensebox (ssid: string) {
+    this.state.wifiSelection = 'connecting'
+    try {
+      await this.otaWifi.connectToSensebox(ssid)
+      this.state.wifiSelection = 'select'
+      this.slides.lockSwipeToNext(false)
+      this.slides.slideNext()
+    } catch (err) {
+      this.state.wifiSelection = 'error'
+      this.errorMsg = err.message
+    }
+  }
+
   private handleCompilation () {
-    this.slides.lockSwipeToNext(!this.state.compiledSketch)
+    this.slides.lockSwipeToNext(!this.compiledSketch)
 
     // need to go online for compilation. compilation is retriggered via this.onlineSub
-    if (!this.state.compiledSketch && !this.state.isOnline) {
+    if (!this.compiledSketch && !this.state.isOnline) {
       switch (this.otaWifi.strategy) {
         case WifiStrategy.Automatic:
           // TODO: auto connect to previous network, if available
@@ -97,20 +114,28 @@ export class OtaWizardPage implements OnInit, OnDestroy {
     }
   }
 
-  private handleWifiSelection () {
+  private async handleWifiSelection () {
     this.slides.lockSwipeToNext(true)
 
-    console.log('wifi strategy:', this.otaWifi.strategy)
-    this.otaWifi.findSenseboxes()
-      .then(console.log)
-      .catch(console.error)
+    if (this.otaWifi.strategy == WifiStrategy.Manual) {
+      this.state.wifiSelection = 'manual'
+    } else {
+      this.state.wifiSelection = 'scanning'
+      try {
+        this.availableSenseboxes = await this.otaWifi.findSenseboxes(this.filterSsids)
+        this.state.wifiSelection = 'select'
+      } catch (err) {
+        this.state.wifiSelection = 'error'
+        this.errorMsg = err.message
+      }
+    }
   }
 
   private compileSketch () {
     // TODO: mock
     this.state.compilation = 'compiling'
     setTimeout(() => {
-      this.state.compiledSketch = 'firmware binary here..'
+      this.compiledSketch = 'firmware binary here..'
       this.state.compilation = 'done'
       this.slides.lockSwipeToNext(false)
     }, 4000)
@@ -119,8 +144,8 @@ export class OtaWizardPage implements OnInit, OnDestroy {
 
 type OtaState = {
   isOnline: boolean,
-  compiledSketch: any,
   compilation: 'compiling' | 'go-online' | 'done' | 'error',
+  wifiSelection: 'scanning' | 'connecting' | 'select' | 'manual' | 'error',
 }
 
 // names for the slide indices for easier access
@@ -128,5 +153,5 @@ enum OtaSlides {
   Intro = 0,
   Compilation = 1,
   WifiSelection = 2,
-  Status = 3,
+  Upload = 3,
 }
diff --git a/src/providers/ota-wifi/ota-wifi.ts b/src/providers/ota-wifi/ota-wifi.ts
index 5b03c2d..4223c46 100644
--- a/src/providers/ota-wifi/ota-wifi.ts
+++ b/src/providers/ota-wifi/ota-wifi.ts
@@ -38,13 +38,17 @@ export class OtaWifiProvider {
     return WifiStrategy.Manual
   }
 
-  async findSenseboxes (): Promise<string> {
+  async findSenseboxes (filterSsids = false): Promise<string[]> {
     if (this.strategy != WifiStrategy.Automatic)
       throw new Error('can not search for WiFi networks on this platform')
 
     return WifiWizard2.scan()
-      .then(n => n.filter(n.SSID.includes(SSID_PREFIX)))
-      .then(n => n.map(n => n.SSID))
+      .then(networks => {
+        if (filterSsids)
+          networks = networks.filter(n => n.SSID.includes(SSID_PREFIX))
+
+        return networks.map(n => n.SSID)
+      })
   }
 
   async connectToSensebox (ssid: string): Promise<any> {
@@ -54,6 +58,8 @@ export class OtaWifiProvider {
     return this.platform.is('ios')
       ? WifiWizard2.iOSConnectNetwork(ssid)
       : WifiWizard2.connect(ssid, true)
+
+    // TODO: validate that the MCU server is available
   }
 
   async uploadFirmware (blob: ArrayBufferLike): Promise<any> {