EDU:BIT Extension for MicroPython

EDU:BIT is a beginner-friendly micro:bit kit specially designed to encourage kids to explore STEAM and learn coding. This MicroPython library provides extension for EDU:BIT Training & Project Kit for micro:bit

Python editor for micro:bit

Step 1: Open Python Editor

Open Python editor at: https://python.microbit.org/v/3

Step 2: Add module

Download MicroPython module from GitHub: https://github.com/Bhavithiran97/micropython-edubit

Click on the Project button in the editor

Click Create file button and creaate 'edubit.py' file

Click Open button and add 'edubit.py' file

Click the right button in pop up and choose 'Replace file edubit.py'

Add from edubit import * at the top of your program

RGB Bit

• This kit has 4x NeoPixels (WS2812B programmable RGB LEDs) built-in.
• EDU:BIT's built-in neopixel works with the default neopixel module that comes with MicroPython on the BBC micro:bit.
• Use import neopixel at the top of your program

Create a NeoPixel strip at pin P1 with 7 LEDs

from edubit import *
import neopixel

np = neopixel.NeoPixel(pin13, 4)

Show color red on all RGB pixels

from edubit import *
import neopixel

np = neopixel.NeoPixel(pin13, 4)
for LED in range(4):
	np[LED] = (255,0,0)
np.show()

Show specific color on each RGB pixels

from edubit import *
import neopixel

np = neopixel.NeoPixel(pin13, 4)
#rainbow color
np[0]= 255,0,0    #red
np[1]= 255,255,0  #yellow
np[2]= 0,255,0    #green
np[3]= 75,0,130   #indigo

clear all RGB pixels

np.clear()

RGB values for commonly used colors

• red = 255,0,0
• orange = 255,164,0
• yellow = 255,255,0
• green = 0,255,0
• blue = 0,0,255
• indigo = 75,0,130
• violet = 138,43,226
• purple = 255,0,255
• white = 255,255,255
• black = 0,0,0

Find more information about Neopixel's MicroPython module here: https://microbit-micropython.readthedocs.io/en/latest/neopixel.html#module-neopixel

Music Bit

• EDU:BIT's built-in piezo buzzer works with the default music module that comes with MicroPython on the BBC micro:bit.
• Use import music at the top of your program

Play built-in melodies

from edubit import *
import music

music.play(music.DADADADUM)

Play custom notes

from edubit import *
import music

#starting tune of "Twinkle Twinkle Little Star"
tune=["C4:1","C4:1","G4:1","G4:1","A4:1","A4:1","G4:1"]
music.set_tempo(ticks=2)
music.play(tune)

Digital IO

Read digital pin 9

from edubit import *

while True:
    if pin9.read_digital():
        display.show(Image.HAPPY)
    else:
        display.show(Image.SAD)

Write digital on pin 12

from edubit import *

while True:
    pin12.write_digital(1)
    sleep(500)
    pin12.write_digital(0)
    sleep(500)

Find more information about analog MicroPython module here: https://microbit-micropython.readthedocs.io/en/v1.0.1/pin.html#module-microbit

Analog IO

Read analog pin 1

from edubit import *

while True:
    if pin1.read_analog() > 500:
        display.show(Image.HAPPY)
    else:
        display.show(Image.SAD)

Write analog on pin 2

from edubit import *

while True:
    pin12.write_analog(511)

Find more information about analog MicroPython module here: https://microbit-micropython.readthedocs.io/en/v1.0.1/pin.html#pulse-width-modulation

DC Motors

from edubit import *

while True:
	#Move forward at full speed
	run_motor(Motor_All, Direction_Forward, speed=255) 
	sleep(1000)
	
	#Move backward at half speed
	run_motor(Motor_All, Direction_Backward, speed=128) 
	sleep(1000)
	
	#Turn left at full speed
	run_motor(Motor_M1, Direction_Backward, speed=255 )
	run_motor(Motor_M2, Direction_Forward, speed=255 )
	sleep(1000)
	
	#Turn right at half speed
	run_motor(Motor_M1, Direction_Forward, speed=128 )
	run_motor(Motor_M2, Direction=Backward, speed=128 )
	sleep(1000)
	
	#Brake both motors
	brake_motor(Motor_All)
	sleep(1000)

Servos

Rotate Servo 1 to 0 degree when button A is pressed, rotate Servo 1 to 180 degrees when button B is pressed, disable Servo 1 when button A+B pressed

from edubit import *

while True:
	#Disable all servo when button A and B pressed
	if button_a.is_pressed() and button_b.is_pressed():
		disable_servo(Servo_All)
		
	#Set servo 1 to position 0 degree (min)
	elif button_a.is_pressed():
		sets_servo_position(Servo_S1, position=0 )
		
	#Set servo 1 to position 180 degree (max)
	elif button_b.is_pressed():
		sets_servo_position(Servo_S1, position=180 )

Traffic Light Bit

Blink the all LEDs

from edubit import *

while True:
	set_led(LED_All, 0)
	sleep(1000)
	set_led(LED_All, 1)
	sleep(1000)

Show running light on the LEDs.

from edubit import *

while True:
	set_led(LED_Red, 1)
	set_led(LED_Yellow, 0)
	set_led(LED_Green, 0)
	sleep(200)
	set_led(LED_Red, 0)
	set_led(LED_Yellow, 1)
	set_led(LED_Green, 0)
	sleep(200)
	set_led(LED_Red, 0)
	set_led(LED_Yellow, 0)
	set_led(LED_Green, 1)
	sleep(200)

Sound Bit

Show sound level

from edubit import *

while True:
	display.scroll(read_sound_sensor())

Show sad face when it's too noisy

from edubit import *

while True:
	if read_sound_sensor() > 512:
		display.show(Image.SAD)

Count claps

from edubit import *

count = 0
while True:
	if read_sound_sensor() > 512:
		count += 1
		display.scroll(count)

Potientio Bit

Show potentiometer value

from edubit import *

while True:
	display.scroll(read_pot_value())

Show heart shape when the potentiometer is turned to the max

from edubit import *

while True:
	if read_pot_value() > 1000:
		display.show(Image.HAPPY)

IR Bit

Show the IR sensor state

from edubit import *

while True:
	display.scroll(read_IR_sensor())

Show a target symbol when an object is detected

from edubit import *

while True:
	if is_IR_sensor_triggered():
		display.show(Image.TARGET)
	else:
		display.clear()

Power Monitoring

This section is for advance user who interested in monitor the power of REKA:BIT.

Show power input voltage

from edubit import *

while True:
	display.scroll(read_Vin())

Show sad face if the voltage is low

from edubit import *

while True:
	if is_low_batt():
		display.show(Image.SAD)

Show sad face if over voltage

from edubit import *

while True:
	if is_overvoltage():
		display.show(Image.SAD)

Reset EDU:BIT

Add power_monitor() function in a while loop to monitor the power state of EDU:BIT. The motors and micro:bit will be reset when:

• Power switch is turned off and turned on while both DC barrel plug and micor B is connected
• DC barrel plug is plugged out and plugged in while micro B cable is connected to micro:bit

from edubit import *

#Move backward at half speed
run_motor(Motor_M2, Direction_Backward, speed=128) 
sleep(1000)

#Brake motor
brake_motor(Motor_M2)
sleep(1000)

while True:
    power_monitor()
    #Move forward at full speed
    run_motor(Motor_M1, Direction_Forward, speed=255) 
    sleep(1000)

    #Brake motor
    brake_motor(Motor_M1)
    sleep(1000)