Hi @alvinhuang
Input validation is in the current API (SDK 1.1) limited to control min, max and step for integer variables.
In this respect, to control an inputted IP address, I would suggest to check the input after the user has inserted it (in the ON_Change event callback), and show a label next to the input field, if the IP address is invalid.
The Save option will become activated whenever you make changes to the DataModel.
Hence, check the event callback, to see when this is written.
Also note, that the Select Event is triggered whenever you add new items to the select. Hence you may want to have a “populate select mode”, where the input is not saved. And when you are done populating, you switch back to “user input mode”, where the user changes are stored correctly.