11. Wukong Breakout Board#

11.1. Introduction#

Wukong 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.

The base board designs with standard 7x5 square bricks that can adapt perfectly to Lego.

../_images/wukong-01.png

11.3. 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

11.4. Parameter#

Parameter Details Instruction Note
Item No. EF08207 SKU -
Size 40.00 X 58.12 X 24.53 mm Including Lego baseboard without micro:bit Manual measurement, size in kind prevail
Weight 41.6g Including Lego baseboard and the battery Manual measurement, weight in kind prevail
Power Switch Click once to turn on, double-click to turn off Four LEDs indicate the power storage, support fast charge Power supply by the USB connection on board is supported
Battery 400mAh Li-ion battery pack 20 minutes for completing the charge that can operate for more than 40 minutes a time Anti-explosion
Working Voltage 3.7v~5v Li-ion battery pack 3.7v，USB 5v -
Working Temperature -20℃~60℃ Charge temperature 0℃~40℃ -
Motor Drive Dual (M1，M2) Motor drive circuit onboard 3.7V
Servo Drive Eight ways servo connection (S0~S7) Servo drive circuit onboard -
IO Port Lead Out P0、P1、P2、P8、P12、P13、P14、P15、IIC Support 3V&5V modules GVS
Rainbow LED LED0、LED1、LED2、LED3 Available for Neopixel database Connect to micro:bit P16 port
Buzzer Passive buzzer with a switch on board Available for music database Connect to micro:bit P0 port
LED 8 LEDs can be programmed on the base side Light on, twinkle, breathing light The LED twinkles when power on
Base board Standard 7*5 baseboard The battery is placed in the middle -

11.5. Outlook and Dimensions#

../_images/wukong_02.png

11.6. Main modules#

Power supply, USB power connection and power storage indicating LED#

../_images/wukong_07.jpg

micro:bit adapter#

../_images/wukong_15.jpg

Motor-drive connection#

../_images/wukong_03.jpg

Servo-drive connection#

../_images/wukong_04.jpg

8 ways standard GVS connection and 5v connection#

../_images/wukong_05.jpg

I2C female header conncetion#

../_images/wukong_06.jpg

4 Rainbow LEDs#

../_images/wukong_08.jpg

Buzzer(reverse side) and switch#

../_images/wukong_09.jpg

../_images/wukong_10.jpg

8 LEDs(reverse side)#

../_images/wukong_11.jpg

Battery connection(reverse side)#

../_images/wukong_12.jpg

Fixed holes M3 for Lego (reverse side)#

../_images/wukong_13.jpg

11.7. 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 once to power on.

../_images/wukong_20.jpg

Software Programming#

MicroSoft makecode online programming

Add Package#

Click Extensions in the drawer of Advanced to see bricks menu.

https://raw.githubusercontent.com/elecfreaks/learn-cn/master/microbitKit/smart_cutebot/images/cutebot-pk-1.png

Search wukong in the box and click it to add package. Completed.

../_images/wukong_14.png

11.8. 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.

../_images/wukong_07.jpg

Breathing LEDs#

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

Links: https://makecode.microbit.org/_4ub57g5FuJ1v

You can also download it below:

Motor#

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

../_images/wukong_03.jpg

Links:https://makecode.microbit.org/_78keCLdmU1Ez

You can also download it below:

Buzzer#

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.

../_images/wukong_09.jpg ../_images/wukong_10.jpg

Link: https://makecode.microbit.org/_JmM5btU4dHUb

You can also download it below:

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.

../_images/wukong_08.jpg

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

You can also download it below:

Servo#

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.

../_images/wukong_04.jpg

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

You can also download it below:

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.

../_images/wukong_16.png

11.9. Software Programming（Python editor）#

Python editor:https://python.microbit.org/v/2.0

Add Python File#

Download to unzip it: EF_Produce_MicroPython-master Go to Python editorhttps://python.microbit.org/v/2.0)

../_images/05001_07.png

We need to add Wukong.py for programming.Click “Load/Save” and then click “Show Files (1)” to see more choices.

../_images/03444_11.png

click “Add file” to add Wukong.py from the unzipped package of EF_Produce_MicroPython-master.

../_images/03444_12.png

../_images/wukong_21.png

11.10. User Guide#

Light up the breathing LEDs#

There are 8 blue LEDs on the base part of the Wukong breakout board, their on/off status and light level could be controlled.

Turn to the breathing LED mode.(Write “False” to replace “true” in “set_light_breath(True)” to turn off the breathing LED )

from microbit import *
from Wukong import *
wk = WUKONG()
wk.set_light_breath(True)

  • Adjust the light intensity of the breathing LEDs

from microbit import *
from Wukong import *
wk = WUKONG()
wk.set_light(100)

Drive the Motor#

There are two driving motor ports in M1 & M2 that are able to connect with most motors in the market.

The motor drives clockwise for 2 seconds and then drives anticlockwise for another 2 seconds.

from microbit import *
from Wukong import *
wk = WUKONG()
while True:
    wk.set_motors(1, 100)
    wk.set_motors(2, 100)
    sleep(2000)
    wk.set_motors(1, -100)
    wk.set_motors(2, -100)
    sleep(2000)

Drive the Servo#

Connect servos to S0~S7, and drive them with the blocks in Wukong breakout board extension. Set 0~180 degrees for servos in 180 degrees. For 360 degrees servos, set 0 degree as the highest speed of driving anticlockwise, set 180 degrees as the highest speed of driving clockwise and 90 degrees to stop driving. Set the degrees ranged from 0~90 and 90~180 as the speed of the servos for driving anticlockwise and clockwise.

from microbit import *
from Wukong import *

wk = WUKONG()
while True:
    wk.set_servo(0, 0)
    sleep(2000)
    wk.set_servo(0, 180)
    sleep(2000)