Ethos v1.5.7 and X18, X20 series User Manual
8. The error shown in the example above has been fixed, and normal running can be
confirmed.
DFU Flasher
The radio bootloader can be always flashed in DFU mode using a power off connection,
even if the radio firmware has been corrupted for any reason. This is because ST
bootloader is in ROM.
Click on the ‘DFU Flasher’ tab.
Click on the “Select Bootloader’ button to browse to your downloaded bootloader file and
select it.