BIGTREETECH Octopus MAX EZ, a 32-bit motherboard, is an upgraded version of Octopus Pro developed by the 3D printing team of Shenzhen Big Tree Technology Co., Ltd. Its self-developed stepper motor sockets enhance safety and user experience, and it adds a series of features that Octopus Pro does not have, greatly enhancing its DIY capabilities.

Key Features:

• 32-bit 550 MHz ARM Cortex-M7 series STM32H723ZET6 MCU
• Onboard BOOT button to enable DFU mode to update the bootloader
• The thermistor circuit is protected to prevent MCU damage from shorted heated bed and heater cartridge connections
• Selectable voltage (24V, 12V, 5V) for CNC fan, no more need for external stepdown thus preventing board damage from user error
• Upgraded with eFuse protection, which response faster with strong protection, effectively protecting the motherboard from being damaged caused by short circuits, over-current, electric spark, etc,
• MCU firmware can be upgraded via SD card, or use DFU via Klipper's make flash command
• 10 EZ driver sockets, working with the pinless driver, safer to use; Onboard SPI and UART, can be used by simply setting in the firmware, no need for a jumper
• Support power loss recovery, filament runout sensor, CAN, auto power-off, BL Touch, RGB, etc
• Replaceable fuse for easy maintenance
• 3 x 4 pins fan ports, also for connecting the water cooling system
• Onboard proximity switch port, supports NPN and PNP types, 24V, 12V, and 5V voltage selectable
• Onboard SPI interface for connecting acceleration sensor to enable Klipper's input shaping

Instructions and Firmware on Github