Tip

• Micro4 uses Katapult via USB connection for firmware flashing by default.

Firmware Flashing Instructions

Important Notes

• The motherboard firmware must be flashed with Klipper via Katapult.
• If you are certain that the motherboard already has Katapult flashed, you do not need to perform the Katapult firmware flashing step at the end.
• You can quickly press the reset button twice to check if an LED on the motherboard starts blinking. If it does, it indicates that the motherboard has entered the Katapult firmware.

How to Determine Which Firmware You Need

Tip

• Please note that you only need to flash one of the following firmware options.

• You can connect to the host computer using one of the following methods:
• USB Firmware
  • Advantages: Reliable and stable communication.
  • Disadvantages: May affect data transmission if multiple USB devices are connected.
• USB Bridge Firmware
  • Advantages: Can connect multiple devices without occupying USB ports.
  • Disadvantages: May cause errors such as homing timeouts when used together with KlipperScreen.