If you have problems connecting to the Wi-Fi, you can remove the configuration profile which will allow to setup a new connection.
To remove a configuration profile in iOS:
On your iOS device, open Settings > General.
Scroll to the bottom and open Profiles. If you do not see a "Profiles" section, you do not have a configuration profile installed.
In the "Profiles" section, select the profile you wish to remove and tap Delete Profile. If you have a passcode for your device, you will be prompted to enter it. Then tap Remove.
To remove a configuration profile in Mac OS X:
From the Apple menu, select System Preferences.
From the System Preferences, select Profiles.
Note: Profiles won't be visible until you have at least one profile installed.
Select the profile you want to remove, and then press the - (minus) button. Click Remove to remove the profile.
You then be able to setup Eduroam from the beginning again.