First perform a factory reset on the device by holding in the pin hole (using a paper clip) for 10 seconds while the unit is powered and fully booted. If just turning on the VidiU mini please allow 2 minutes after turning on before holding in pin hole button.
Turn off Bluetooth on your device and scan for WiFi devices.
Connect to the VidiU mini's wireless access point. It should be called VidiU-mini-XXXXX
Once connected open the VidiU app on your device (or type 172.16.1.1 into a web browser)
Then go to Settings -> Network -> Wireless
Choose Client (Browse) and then Select you Wireless Network.
Once that is done on your device connect it to the same wireless access point you connected your VidiU mini too
Re-Open the VidiU app (or type the IP Address of VidiU into a web browser) to configure.