Introduction

To make your new board work, you need to put the MCU firmware onto the board.

What is an MCU?

MCU stands for "Microcontroller Unit" and is the processor on each board. Usually boards connected to Klipper are called "MCU boards", but often it's abbreviated as "mcu". So whenever you read "MCU", it can either mean the whole board or the processor itself, depending on the context.

Klipper vs. Klippy confusion

Klipper consists of 2 parts:

The host code, also known as "klippy", runs on a Linux computer like a Raspberry Pi, Banana Pi, any other single-board computer or even an old laptop - typically referred to as "host". This part is responsible for managing all connected boards, calculating movements as well as interpreting G-code commands and translating them into syncronized movements for all connected boards.
The klipper firmware, which runs on the MCU. It communicates with klippy on the host, receives it's commands and executes them at the exact time required.

Introduction

Flashing Preparations

Initial Flash

Update Flash

After the flash