Flashing

In order to manually set the device in bootloader mode, hold the left button until it starts blinking:

If you would like to keep the current identity of the badge, please only start flashing from 0x100000. For more information please have a look at the slides.

Note, this is generally not needed but provides a backup solution in case something broke. You can manually flash firmwares via esptool-js or on command line with esptool:

pip install esptool