The Wireless Link app is available to interface with Axiom quarter-turn and Prism linear discrete valve controllers. The app allows users to set switches, operate valves and view valve diagnostics remotely. Communication is enabled through secure Bluetooth technology, providing a method to store maintenance information, tag numbers, cycle counts and electronics temperatures using the app on a conventional iPhone or iPad. A direct link to installation and maintenance manuals within the app is available when connected to the Internet. The wireless link and app are available with Axiom and Prism models using AS-Interface and DeviceNet protocols.