Most of the EFR32's pins are routed from the radio board to breakout pads at the top and bottom edges of the Wireless STK Main-board. A 2.54 mm pitch pin header can be soldered on for easy access to the pins. The figure below shows you how the pins of the EFR32 maps to the pin numbers printed on the breakout pads.
The Simplicity Studio® 5 (SSv5) Simplicity Integrated Development Environment (IDE) perspective is designed to support code editing, downloading, and debugging for EFR32 devices and modules and EFM32, EFM8, and 8051 devices. The Simplicity IDE perspective is made up of three views areas, the editor area, and a toolbar. Project Explorer View