BigTreeTech Octopus-Pro

Octopus-Pro-V1.1

V1.1 is to solve the problem of Hotend port being continuously enabled in the STM32H723 version dfu mode

Changes in V1.1 compared to V1.0

• Pinout changes

  Title	Octopus Pro V1.0/V1.0.1	Octopus Pro V1.1
  HE0	PA2	PA0
  HE2	PB10	PB0
  Motor4-EN	PA0	PA2
  RGB	PB0	PB10

• CAN bus interface sub model

  Octopus Pro V1.0/V1.0.1	Octopus Pro V1.1
  RJ11	XH2.54*2Pin

Warning for Octopus Pro

• The voltage of all 8 drives can be selected by the jumper, If the jumper is inserted on the left, the corresponding driver voltage is MOTOR_POWER, it is Main Power if it is inserted on the right. The MOTOR_POWER port maximum voltage supported is up to 60V, the Main Power port maximum voltage supported is only 28V. The all 8 drivers of this motherboard can be used in any combination MOTOR_POWER or Main Power.
  Warning: please make sure that the correct voltage is selected by the jumper In order to use the non high voltage version of the driver (such as: TMC2209, TMC2130, or Non high voltage version TMC5160), otherwise the driver will be burned, and even the motherboard may be burned.
  
  
  
  

Difference between Octopus-Pro and Octopus V1.0 / V1.1

1. Support up to 60V high-voltage stepper drivers, and each driver can select the voltage from MOTOR_POWER or Main Power by jumper.
2. Both NPN and PNP type proximity switch are supported on Probe port(V1.0 / V1.1 can only supported PNP type). The IO of this port is no longer multiplexed with Bltouch, and a separate IO PC5 is used for this port
3. On board INA826 is modified to Max31865, which supports PT100 / PT1000 and has higher accuracy.
4. The pin arrangement of raspberry pi header is modified to be exactly the same as raspberry pi. From top to bottom: 5V 5V GND RX TX.

Firmware

• The IO of Octopus-Pro V1.0 and Octopus (non-pro) V1.0 / V1.1 are the same, except the IO of proximity switch Probe port is no longer multiplexed with Bltouch and is modified to a separate IO PC5. Please refer to Octopus V1.0/V1.1 here
• The IO of the Octopus-Pro V1.1 is different with the differences being shown in the table above.

Review

• You can find a complete review with detailed features of our electronics in Spanish and English on 3dwork.io.