Platform siliconlabsefm32

Silicon Labs EFM32 Gecko 32-bit microcontroller (MCU) family includes devices that offer flash memory configurations up to 256 kB, 32 kB of RAM and CPU speeds up to 48 MHz. Based on the powerful ARM Cortex-M core, the Gecko family features innovative low energy techniques, short wake-up time from energy saving modes and a wide selection of peripherals, making it ideal for battery operated applications and other systems requiring high performance and low-energy consumption.

For more detailed information please visit vendor site.


Name Description
framework-mbed mbed Framework
toolchain-gccarmnoneeabi gcc-arm-embedded


Linux Users:

  • Ubuntu/Debian users may need to add own “username” to the “dialout” group if they are not “root”, doing this issuing a sudo usermod -a -G dialout yourusername.
  • Install “udev” rules file 99-platformio-udev.rules (an instruction is located in the file).
  • Raspberry Pi users, please read this article Enable serial port on Raspberry Pi.

Windows Users: Please check that you have correctly installed USB driver from board manufacturer


Name Description
Framework mbed The mbed framework The mbed SDK has been designed to provide enough hardware abstraction to be intuitive and concise, yet powerful enough to build complex projects. It is built on the low-level ARM CMSIS APIs, allowing you to code down to the metal if needed. In addition to RTOS, USB and Networking libraries, a cookbook of hundreds of reusable peripheral and module libraries have been built on top of the SDK by the mbed Developer Community.



Silicon Labs

ID Name Microcontroller Frequency Flash RAM
efm32gg_stk3700 Silicon Labs EFM32GG-STK3700 (Giant Gecko) EFM32GG990F1024 48 MHz 1024 Kb 128 Kb
efm32hg_stk3400 Silicon Labs SLSTK3400A USB-enabled (Happy Gecko) EFM32HG322F64 24 MHz 64 Kb 8 Kb
efm32lg_stk3600 Silicon Labs EFM32LG-STK3600 (Leopard Gecko) EFM32LG990F256 48 MHz 256 Kb 32 Kb
efm32pg_stk3401 Silicon Labs SLSTK3401A (Pearl Gecko) EFM32PG1B200F256 40 MHz 256 Kb 32 Kb
efm32wg_stk3800 Silicon Labs EFM32WG-STK3800 (Wonder Gecko) EFM32WG990F256 48 MHz 256 Kb 32 Kb
efm32zg_stk3200 Silicon Labs EFM32ZG-STK3200 (Zero Gecko) EFM2ZG222F32 24 MHz 32 Kb 4 Kb