- Stock: 4
- Model: Octopus
Model:
Octopus Board
Octopus PRO F446 180MHz 512K Flash
Octopus PRO H723 550MHz 512K Flash
The BIGTREETECH Octopus V1.1 is a 32-bit controller for 3D printers requiring many motors, heaters and peripherals. This product is the non-Pro STM32F446ZET6 180 MHz version, with eight replaceable driver sockets and mature Klipper and Marlin support.
It is widely used in CoreXY projects such as Voron 2.4 and Voron Trident, where several Z motors can be controlled independently. It is not preconfigured for one printer; firmware, pin mapping, drivers, voltages and wiring must match the build.
Expansion capacity
| Item | Available |
|---|---|
| MCU | STM32F446ZET6 ARM Cortex-M4, up to 180 MHz |
| Drivers | 8 replaceable sockets; STEP/DIR and, depending on module, UART or SPI |
| Motors | 9 connectors; MOTOR2_1 and MOTOR2_2 share one driver |
| Heating | 1 bed + 4 HE0-HE3 outputs |
| Temperature | TB + T0-T3 |
| Fans | 6 PWM + 2 always-on outputs |
| Communications | USB-C, CAN, UART, SPI, I2C and microSD/SDIO |
| Size | 160 × 100 mm; 150 × 90 mm mounting centres |
Power and fans
The board separates main, bed and motor power inputs. BIGTREETECH recommends 24 V. Its documentation allows 12 V for bed and motors only, while the main logic/hotend/fan input must exceed 14.1 V; a complete 24 V system is the simplest approach.
Set each controlled fan output to 5, 12 or 24 V with the correct jumper before connecting a fan. A wrong setting can overvoltage the peripheral.
Drivers and sensors
The eight sockets accept compatible plug-in drivers. Jumpers select microstepping and communications, so do not copy a layout intended for another driver. The BIGTREETECH TMC2209 is a UART option, while the BIGTREETECH TMC2130 V3.0 uses SPI; both require the correct pinout, current and cooling.
TB and T0-T3 are analogue inputs and firmware must use the exact sensor curve. A 100 kΩ nominal resistance alone does not identify a thermistor table.
Klipper setup
- Read the MCU marking; this product should carry STM32F446.
- In
make menuconfig, select STM32F446, 32 KiB bootloader and 12 MHz crystal. USB uses PA11/PA12. - Build, rename to
firmware.binand flash from a FAT32 microSD with power off. - Start from
generic-bigtreetech-octopus-v1.1.cfg, then configure the actual kinematics, size, motors, drivers, currents, sensors and peripherals. - Use the stable
/dev/serial/by-id/...path and test homing and heating in supervised stages.
Klipper explicitly warns that this generic file is for the non-Pro Octopus. Using it on Octopus Pro V1.1 may inadvertently enable a heater.
Marlin setup
#define MOTHERBOARD BOARD_BTT_OCTOPUS_V1_1Then configure the actual drivers, sensors, hotends, fans, machine dimensions, endstops and probe. Build for STM32F446 using the Octopus environment provided by your Marlin release. Never reuse an Octopus Pro or different-MCU binary.
Voron use
Voron provides reference configurations for Octopus V1.0/V1.1 on Trident and 2.4. They demonstrate architectural suitability, not a universal finished configuration. Select the correct machine size, mechanical revision, drivers, probe and toolhead, then validate every pin.
Displays and alternatives
EXP1/EXP2 support compatible LCDs and a serial port supports BIGTREETECH touchscreens. The BIGTREETECH Mini12864 V2.0 is a conditional option after checking cable orientation and firmware. For an H723 platform with separate driver power, see the BIGTREETECH Octopus Pro V1.1.
It is for you if
- You need five to eight independently controlled drivers.
- You are building a Voron 2.4, Trident or another custom multi-axis machine.
- You want a well-documented Klipper or Marlin controller.
It is not for you if
- You require a drop-in replacement with no firmware build or rewiring.
- You need integrated drivers or proprietary matching connectors.
- Your project specifically requires Octopus Pro electrical features or MCU.
Technical documentation: official BIGTREETECH Octopus repository and official Klipper Octopus V1.1 non-Pro configuration.
