Manual 2 · Chapter 7
Pairing handheld scanners and phones
Every device has to be told once where KoonScan is. You need the Address for the devices from the wizard (step 5), for example https://sapserver:5443. Lost it? Administration → Server → HTTPS.
Handheld scanner (Android app, recommended)#
- Download the app file (APK) from the customer portal → Downloads → Android app, put it on the handheld scanner (with a USB cable, or download it on the scanner itself) and tap it to install. If Android asks whether you may install apps from this source: Allow.
- Open the KoonScan app.
- Type the Address for the devices and tap Connect.
- The app shows a fingerprint. Compare it with Administration → Server → HTTPS → "CA fingerprint (SHA-256)". The same? Then confirm with Trust.
- Do you work with more SAP companies? Then the app asks Choose the company. Tap the company of this handheld scanner. You can then no longer switch on the login screen; you choose another company by pairing again (in the app: Settings → Change server address).
- The login screen appears. Done. Do the same on every handheld scanner.
- Put KoonScan on the home screen: open the list of all apps (swipe up), hold your finger on KoonScan and drag it to the home screen.
Updating the Android app#
The app on the device usually does not need an update: it shows the web app of the server, so a new version of KoonScan on the server is visible straight away. Only when KoonSystems announces a new Android app (in the release notes):
- Download the new APK from the customer portal → Downloads → Android app.
- Install it over the old app, as in step 1 above. Pairing, server address and company stay.
- Check: in the app, Settings → About this app shows Android app with the new version.
Phone or tablet with a browser#
- Send the file scan-ca.crt (from the wizard, or from the folder C:\KoonScan\cert on the server) to the phone, for example by email.
- Android: Settings → Security → Encryption & credentials → Install a certificate → CA certificate → choose scan-ca.crt.
- Open the browser and type the Address for the devices (or scan the QR code from the wizard with the camera).
- In the browser menu choose Add to Home screen. KoonScan then appears as an app icon on the phone.

