Label your thermistors before unplugging. Putting the bed thermistor in the hotend port will cause thermal runaway errors. 2. BLTouch/CR-Touch Setup (V2.2)

Installing a BLTouch is one of the most popular upgrades for this board. The community has mapped the required pins clearly: Creality V2 2 Board Diagram

The STM32F103RET6 is in a 64‑pin LQFP package. Below is a partial mapping relevant to firmware development. Label your thermistors before unplugging