The Pressero application does not allow for direct outside connections, such as through ODBC, directly to the database on the Pressero system. Any communication with the Pressero application must be done through the Pressero REST API, and would involve a programmer on your side developing a program that would talk to your database, and also to the Pressero application.
Technical details on the calls and functionality available in the Pressero API can be found here:
Descriptions of different approaches available for integrating with the Pressero application are listed here:
Please note that API access is an addon to any Pressero account subscription. Please contact your salesperson if you are interested in enabling API access for your Pressero account.