Install app QREvented from Google Play (for Android device) or from Appstore (for iOS device)
Start the app
In app Settings set "Server URL" to "known server" https://qrevents.lv
On entry page select Internet event
Enter course code: sample22
Enter your code as "SExxxxxxxx", where "xxxxxxxx" usually is participant's phone number, but for sample event you can use any digits (0-9).
Press Register and you will be ready to enter/scan QR codes for controls on course.