> For the complete documentation index, see [llms.txt](https://docs.cartographer3d.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cartographer3d.com/cartographer-probe/archive/broken-katapult-bootloader.md).

# Broken Katapult Bootloader

There are some Cartographer V3 ADXL probes that were shipped with a broken version of katapult. Unfortunately this means that when you go to update firmware via Katapult, the device wont be able to enter katapult mode for flashing.\
\
Fixing it is quite simple.

## Step 1. [Visit Here for the DFU flashing guide.](/original-plugin/firmware-archive/firmware-updating/via-dfu.md)

## Step 2. Once Flashed

If you chose FULL CANBUS, unplug the cable and plug Cartographer into your CANBUS cable.

If you chose FULL USB, unplug and re-plug into USB cable.

## Step 3. All Done

## Optional Step: Survey Touch

If you want to use **Survey Touch you will need to do some extra steps.**

* For USB, [Check out this guide on updating firmware to Survey Touch mode.](/original-plugin/firmware-archive/firmware-updating/via-katapult/usb-flash.md)
* For CANBUS, [Check out this guide on updating firmware to Survey Touch mode.](/original-plugin/firmware-archive/firmware-updating/via-katapult/canbus-flash.md)

### Katapult Bootloader will now be fixed for future flashing and DFU will not be required unless another issue arises with Katapult.


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