XCTU is a free multi-platform application designed to enable developers to interact with XBee RF Modules through a simple-to-use graphical interface. It includes new tools that make it easy to set-up, configure, and test the XBee modules. XCTU can be downloaded directly from Digi International’s digi.com website. The API Frame Builder with XCTU is a simple development tool for quickly building XBee API frames. XCTU offers Device Cloud integrated, allowing configuration and management of XBee devices anywhere in the world.