# 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](/original-plugin/firmware-archive/manual-methods/archive/which-firmware/cartographer-v1-rp2040-based-probe.md) ### If you have a STM32 based V2 or V3 - [Check Here](/original-plugin/firmware-archive/manual-methods/archive/which-firmware/cartographer-v3-w-input-shaper-usb-can.md) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.cartographer3d.com/original-plugin/firmware-archive/manual-methods/archive/which-firmware.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.