Wukong board with Lego holder for microbit

How to use wukong board with Lego holder for micro:bit

1.1. Introduction

Wukong board with Lego holder for microbit

Wukong board is a high integrated breakout board with multiple functions based on micro:bit, which has a similar size with the micro:bit with buzzer, servo and motor drivers on board.

With a built-in 400mAh Li-ion battery pack and the on-board power controlling system, it supports fast charge with only 20 minutes for full filling that can operate for more than 40 minutes a time.

Wukong board with Lego holder for microbit

The base board designs with standard 7×5 square bricks that can adapt perfectly to Lego.

1.2. Characteristics

  • Tiny shape with high integration
  • Standard Lego bricks connection
  • Most of the IO ports led out in GVS form
  • Standalone IIC pots, available for OLED and BME280.
  • Integrated buzzer and switch
  • Integrated motor-drive circuit
  • Integrated servo-drive circuit
  • Support 5V sensors
  • Built-in 400mAh Li-ion battery pack, on-board power controlling system, four LEDs indicate the power storage
  • Support fast charge

1.3. Parameter

Item No.EF08207SKU
Size40.00 X 58.12 X 24.53 mmIncluding Lego baseboard without micro:bitManual measure, size in kind prevail
Weight41.6gIncluding Lego baseboard and the batteryManual measure, weight in kind prevail
Power SwitchClick to turn on, double to turn offFour LEDs indicate the power storage, support fast chargePower supply by the USB connection on board is supported
Battery400mAh Li-ion battery pack20 minutes for completing the charge that can operate for more than 40 minutes a timeAnti-explosion
Working Voltage3.7v~5vLi-ion battery pack 3.7v,USB 5v
Working Temperature-20℃~60℃Charge temperature 0℃~40℃
Motor DriveDual (M1,M2)Motor drive circuit onboard
Servo DriveEight ways servo connection (S0~S7)Servo drive circuit onboard
IO Port Lead OutP0、P1、P2、P8、P12、P13、P14、P15、IICSupport 3V&5V modulesGVS
Rainbow LEDLED0、LED1、LED2、LED3Available for Neopixel databaseConnect to micro:bit P16 port
BuzzerPassive buzzer with a switch on boardAvailable for music databaseConnect to micro:bit P0 port
LED8 LEDs can be programmed on the base sideLight on, twinkle, breathing lightThe LED twinkles when power on

1.4. Dimmension

Mecanum Wheels Robot Control Wukong board with Lego holder for micro:bit

1.6. Quick Start

Hardware Connection

  • Insert the micro:bit into the adapter(The logo side of the micro:bit stands towards the side for buzzer switch )
  • Click to power on.

Software Programming

Add Package

  • Click Extensions in the drawer of Advanced to see bricks menu.
  • Search wukong in the box and click it to add package.
  • Completed

1.7. User Guide

Ways to power on&charge

  • Original power switch, click to power on and the indicator LED lights on.
  • Double click to power off and the indicator LED lights off.
  • Connect the USB cable to the on-board connection. The normal lighting-on LEDs indicate the state of charge, if the left LEDs lights on in turn, it indicates the charge of the battery.

Breathing LEDs

  • There are 8 blue breathing LEDs whose power on/off status and brightness can be controlled on the baseboard.


  • There are two kinds of motor driving connections named M1 and M2 that can connect most motors in the market.


  • There is an on-board buzzer that is connected to the P0 port of the micro:bit, it can be programmed by the Music brick and can be powered on/off with the on-board buzzer switch.


Rainbow LEDs

  • There are 4 Rainbow LEDs named LED0、LED1、LED2、LED3 that are connected to P16 port of the micro:bit and they can be programmed by the Neopixel brick.

Links: https://makecode.microbit.org/_61T2w6cqTib0


  • Connect the servos to their driving connections S0~S7, they can be programmed by the servo bricks in Wukong expansions.
  • 180° servos can be set from 0°~180°.
  • Set 0° as the maximum speed of positive rotation, 180° as the maximum speed of negative rotation and 90° as stop for 360° servos , 0°~90° and 90°~180° are the scape for adjusting the speed.

Links: https://makecode.microbit.org/_6Pw63w49u5qq

5V Power Supply Pins

  • There are 3 pairs on-board 5V power supply connections that can drive sensors or servos in 5V , it only requires to connect the connections for 5V modules to 5V power supply, and to connect the signal cables to the signal connections for servos or sensors.
Robotbit Expansion Board

How to use Robotbit

Robotbit is an excellent robotic expansion board specially designed for Microbit by KittenBot team.

Product Feature

It has a powerful ability to drive DC motors, stepper motors, servos, and onboard buzzer and RGB pixels and release all valid IO from microbit, with support the most common electronics module in the market. It comes with 18650 battery holder, integrated lithium battery boost, charging and protection chip. Support for external power input. Mechnically support for KittenBot robotic chassis and LEGO technical slots. The powerful drive capability and built-in battery make DIY more convenient and free. We have received unanimous praise from the school teacher training institutions and individual enthusiasts. It is an excellent choice for your robotic projects based on Micro:bit!

Product Parameters

  • Dimensions: 78mm x 57mm x 23mm
  • PCB Thickness: 1.5mm
  • Small mechnical hole: 3.0mm
  • Big mechnical hole: 4.8mm
  • Net weight (without packaging): 37.5g

Functional parameters

  • 18650 battery voltage: 3.7V
  • USB input voltage: 5V
  • VM pin max ouput: 1A (with onboard battery)
  • External Voltage Input (the green termial): 5V (only supports 5V input, do not connect over 5V, maximum current supports 3A)

Supported software

Available Coding platform: Kittenblock(based on Scratch3.0) or Makecode and python(Mu editor in microbit mode)

MakeCode from Microsoft

KittenBlock(Developed by Kittenbot Team based on Scratch 3.0)


If you’re used to code programming and want to get started by microbit python you have two options, directly Mu Editoror kittenblock in micropython editor mode.

The above detailed tutorial can be found from our learn website for self-learning. If you encounter problems during the learning process, you are welcome to get us at our bbs or slack channel.

Makecode Extension

In makecode add extension panel directly search Robotbit. In our offline version of makecode, you may find Robotbit in the default list and other useful extensions.

Hardware interface

Robotbit robotics expansion board for micro:bit
  1. 5V external power input(with anti-reverse protection)
  2. Power switch
  3. Power Indicator
  4. Battery Indicator
  5. Micro USB charing port
  6. 4-channel DC motor / 2-channel stepper motor
  7. Jumper for buzzer selection
  8. 8 channel IO(corresponding to Micro:bit P0-P2、P8、P12-P15)
  9. 5V and GND port
  10. Buzzer
  11. 8 channel servo port
  12. I2C interface (expandable I2C module)
  13. 18650 battery case
  14. Bettery protection recovery push button
  15. Micro:bit edge connector
  16. 4x RGB pixel
  1. Servo driver (PCA9685)
  2. 2xDc/Stepper driver (DRV8833)
  3. KittenBot robot chassis mounting hole
  4. Standard LEGO hole
Robotbit robotics expansion board for micro:bit

Turn on the 18650 battery switch

Open the makecode editor (http://makecode.microbit.org) and press add package.

Search robotbit

Drag some of the robotbit blocks out to workspace, remember to connect the corresponding motor servos, etc.

Before downloading, remember to connect to Microbit’s with a micro usb cable and click the download button.

After click download button, a file save box will prompt, please choose to save it to the Microbit removable disk.

the final effect of the code block in the diagram above


The battery is plugged in, there is no response after turn on switch?

Check if the battery activation button has been pressed? Check if the battery is positive or negative? Check if the battery has power?

What is the battery activation button used for?

In the case of overcurrent, or short circuit, or switch battery cell, the battery protection chip will protect the the circuit. Click the battery activation button to resume normal working mode.

Pluged in usb cable and I can’t find Microbit

The usb on the robotbit can only be used for charging. It can’t be used to download the program. It is plugged into the usb port of the robotbit. The computer will not respond.

Will it smoke if I insert battery inverse?

No, the robotbit design is anti-reverse protect in consideration of general miss operations. Inversely plug in will just not output power.

Will Microbit damage if plug in face back?

No, it will just refuse to work.

P0 pin control does not respond? Is it broken?

You need to unplug the buzzer selection jumper to use P0 as common IO.

Where is the rest of Microbit’s IOs?

Nearly 20 programmable IO ports on the Microbit, but many have been multiplexed with the dot matrix buttons on the board. Considering the inconvenience caused by multiplexing, beginners are likely to confuse on these. We have bridge 8 IO with no conflict to matrix or buttons to Robotbit, it should be enough for most diy projects. If you need all IO from microbit please choose IOBit from kittenbot team.

Can the servo interface act as common IO?

No, the servo s1-s8 is extended with a special servo drive chip and can only be used for servo drive.

What is the use of the VM on the motor interface?

The power source for 4-phase 5-wire stepper motor like 28BYJ. Usually, the VM is not used for the DC motor, and the DC motor only needs to connect A+A- or B+B-.

Can the board be placed on a metal surface or in a humid environment?

No, it will be short-circuited, pay attention to insulation

What is the voltage input for the green external power supply? What will happens with a higher voltage input?

Can only be connected to 5V, above 5V will damage the board, the current is recommended 2~3A, which means that the maximum current supported by the board is 3A

I did follow the tutorial, not results

If the test results are not corresponding, first check your wiring and procedures, some small place in general is missing, please double check.

Tiny:bit LED light

LED light 


1-1.The position of the LED lights in the robot car

1-2.Learn about the principle of LED

Programming method:

Mode 1 online programming: First, we need to connect the micro:bit to the computer by USB cable. The computer will pop up a USB flash drive and click on the URL in the USB flash drive: http://microbit.org/ to enter the programming interface. Add the Yahboom package: https://github.com/lzty634158/Tiny-bit to program.

Mode 2 offline programming: We need to open the offline programming software. After the installation is complete, enter the programming interface, click【New Project】, add Yahboom package: https://github.com/lzty634158/Tiny-bit, you can program.In the picture shown below, the two white squares circled by the red wire frame are the colorful lights on the Tiny-bit.


Principle:  LED light (red, green, blue) are packaged in the LED module. We can mix different colors(256*256*256) by controlling the brightness of the three LEDs.

2.Learning goal

2-1.Learn how to use RGB lights graphically program building blocks

2-2.We will make two LED lights of Tiny-bit light up white by programming.

3.Search for block

The following is the location of the building blocks required for this programming.


4.Combine block

The summary program is shown below:


5.Experimental phenomena

After the program is downloaded, we can see that a micro:bit board will display a heart pattern on the dot matrix. Two LED lights will be lit white, as shown below.


The code of the experiment: 1.LED  light.rar: http://www.yahboom.net/xiazai/Tiny_bit/3.Light%20of%20Tiny%20bit/1.LED%20%20light.rar