About this item

The BIGTREETECH BTT EBB42 CAN V1.2 is an advanced toolhead expansion board designed to simplify wiring and improve performance for modern 3D printers, especially those using Klipper firmware. Engineered with CAN bus communication, the EBB42 mounts directly on the printhead and dramatically reduces the number of wires running from the mainboard, making it ideal for machines like Voron 2.4, Trident, or custom CoreXY builds. At its core is a powerful STM32G0B1 microcontroller, which manages real-time toolhead operations and communicates with the mainboard via a single CAN cable. The EBB42 V1.2 supports a wide range of functions including control of a hotend heater, thermistor, dual fans (hotend + part cooling), BLTouch or other probes, filament sensors, and endstops. It also includes a stepper driver socket, compatible with UART drivers such as the TMC2209, allowing direct control of the extruder motor on the toolhead. Version 1.2 brings hardware upgrades such as better thermal management, electrical protection, and improved reliability under continuous use. Combined with a CAN-capable mainboard like the BTT Octopus Pro or Manta series, the EBB42 V1.2 delivers a cleaner, more efficient, and highly modular 3D printing setup.