Once you have set up the WIFI on the vx690 terminal you'll need to pair the terminal with the driver app.
To pair go into the menu and tap 'Eftpos Terminal' and your terminal will automatically be listed.
Tap connect and enter the IP Address (Example: 172:20:10:2) that is displayed on the terminal but don't tap connect.
First, you need to tap connect on the terminal followed by the phone. It should only take around 5-10 seconds to connect.
Once connected a 'pairing code' will be displayed on both devices, make sure they are both the same and tap 'Yes' on both devices and 'Complete Setup' on the terminal.