# 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.

<img src="/sticks3_bootloader.gif">

Note, this is generally not needed but provides a backup solution in case something broke. You can manually flash firmwares via [esptool-js](https://espressif.github.io/esptool-js/) or on command line with esptool:

```
pip install esptool
```