Some Rev2.0 Can not upgrade to Rev2.3 firmware So we will remove the upgrade tool

Is it possible to update without a tool but with a programmer?\r\nIf so, can I receive the bootloader please?

hans:

23 Nov 04:11:19 PM

Hi，the last batch who order the key have give a new board as a gift ：） we have not try direct upload from bootloader

Is it possible to receive the bootloader files?\r\nFrom V2 as well from V2.3 I have 2 main boards so I can try on one board.\r\n\r\nThanks.