Program micro:bit mobile robot with Python | 5 Line Follow

OVERVIEW

rero:micro is a child-friendly robot kit using micro:bit that is specially designed to encourage young children to learn coding in a fun and easy manner.

MicroPython is an open source Python programming language interpreter that runs on small embedded development boards.

rero:micro has 3 built-in infrared sensor connected to micro:bit's P13, P14, P15 to line follow.

This is the fifth lesson (LineFollow) for this series. Check out the other lessons in the links below:

• Program micro:bit mobile robot with Python | 1 Colour Splash
• Program micro:bit mobile robot with Python | 2 Play Music
• Program micro:bit mobile robot with Python | 3 Move Around
• Program micro:bit mobile robot with Python | 4 Detect Object

SOFTWARE SETUP

Check out the first lesson (Colour Splash) for the guidelines to setup the software.

LINE FOLLOW

CODING

To program the rero:micro you need to add these code:

from reromicro import *  

rero = reromicro()

rero.ReadLineSensors() function must be called to read all three line sensors first before using

Use rero.LineIrIntensity(rero.(x)) to get the reflected infrared (IR) intensity value, ranging from 0 to 1500

from reromicro import *  

rero = reromicro()
while True:
    rero.ReadLineSensors()
    display.scroll(rero.LineIrIntensity(rero.centerSensor))
    sleep(500)

rero.LineSensorDetectsLine(rero.(x)) returns true if the value is more than the threshold value

Here is an example code to line follow

from reromicro import *  

rero = reromicro()
while True:
    rero.ReadLineSensors()
    
    if rero.LineSensorDetectsLine(rero.centerSensor):
      rero.RunMotor(50, 50)

    elif rero.LineSensorDetectsLine(rero.rightSensor):    
       rero.RunMotor(40, -40)

     elif rero.LineSensorDetectsLine(rero.leftSensor):
       rero.RunMotor(-40, 40)

UPLOAD

MU EDITOR

Check out the first lesson (Colour Splash) for the guidelines to upload program to rero:micro