How to call the bootloader

1. using the UART CLI interface type:

  > bootload

1. the EFR32 immediately reboots in bootloader mode. If you flashed the Xmodem bootloader you should get a prompt menu as this one :

  Gecko Bootloader v2.01.00
  1. upload gbl
  2. run
  3. ebl info

1. you can now type 1 and use a xmodem transfer to load the updated firmware.