Hi Aurelio, it is in our plans to upgrade to the latest version of ODK Collect. Currently, we modified their 1.1.5 release to include functionality to retrieve Id's and provide validation features. If you want these features you will need to use our customized client for now. Alternatively, you can use ODK official version 1.1.7 and things will work, but our augmented functionality will not be available.
This shows all the changes we made to their client. It was based off the 1.1.5 release. We would welcome any contributions in merging these changes into their current release.
If you have any questions, please don't hesitate to ask
Thanks