We published new platform sources for the Silicon Labs EFR32BG22 Thunderboard evaluation kit .
These platform sources enable you to use the core part of the MicroEJ runtime, running on top of Micrium OS RTOS.
They are using a BSP from the Silicon Labs Gecko SDK using Simplicity Studio . Be sure to follow the specific README for the BSP. Next, you can play with the foundation libraries examples available on our Github repository .
The MicroEJ Team
 SLTB010A EFR32BG22 Thunderboard Kit - Silicon Labs
 Simplicity Studio - Silicon Labs
 GitHub - MicroEJ/Example-Standalone-Foundation-Libraries: This project gathers all the basic examples of the foundation libraries.