# Which Firmware?

Which firmware should I use? 

Selecting the correct firwmare is essential for the operation of the probe, please check which probe you have, and which mode it is being used in and cross reference the table below. 

### If you have a RP2040 based V1 - [Check Here](https://docs.cartographer3d.com/original-plugin/firmware-archive/manual-methods/archive/which-firmware/cartographer-v1-rp2040-based-probe)

### If you have a STM32 based V2 or V3 - [Check Here](https://docs.cartographer3d.com/original-plugin/firmware-archive/manual-methods/archive/which-firmware/cartographer-v3-w-input-shaper-usb-can)