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bitbotxl

A Python module for the 4tronix Bit:bot XL.

You might use this with the Visual Studio Code extension found at https://github.com/oivron/microbit-extension-vscode. The extension is available from Visual Studio Code Marketplace.

Installation

pip install bitbotxl

Usage

See documentation and examples for the Bit:bot XL below.

See micro:bit Micropython API for a complete documentation on how to use the micro:bit.

Import

To use this module in your Python script:

from bitbot import *

Bit:bot XL documentation/API

# Set left/right bias to match motors.
# Direction: LEFT or RIGHT.
# Bias in %.
bias(direction, percent)

# Move robot forward or reverse at speed.
# Direction: FORWARD or REVERSE.
# Speed in %.
go(direction, speed)

# Move robot forward or reverse at speed for milliseconds.
# Direction: FORWARD or REVERSE.
# Speed in %.
# Duration in milliseconds.
goms(direction, speed, duration)

# Rotate robot left or right at speed.
# Direction: LEFT or RIGHT.
# Speed in %.
spin(direction, speed)

# Rotate robot left or right at speed for milliseconds.
# Direction: LEFT or RIGHT.
# Speed in %.
# Duration in milliseconds.
spinms(direction, speed, duration)

# Sound a buzz for milliseconds.
# Duration in milliseconds.
buzz(duration)

# Read line sensor.
# Directon: LEFT or RIGHT.
linesensor(direction)

# Read ultrasonic distance sensor.
# Returns distance in cm.
sonar()

# Stops the Bit:bot.
stop()

Examples

Simple examples on how to use the line sensor and the ultrasonic distance sensor. You need to add additional code to create complete scripts.

Adjust the arguments for speed and duration according to your own preferences.

Line sensor

# Let Bit:bot follow a dark line.
if (bitbot.linesensor(RIGHT) == 1):
    bitbot.spinms(RIGHT, 10, 1) # Adjusts direction. Arguments need to have very small values.
elif (bitbot.linesensor(LEFT) == 1):
    bitbot.spinms(LEFT, 10, 1) # Adjusts direction. Arguments need to have very small values.
else:
    bitbot.go(FORWARD, 50)

# Let Bit:bot drive between two dark lines.
if (bitbot.linesensor(RIGHT) == 1):
    bitbot.spinms(LEFT, 10, 1)
elif (bitbot.linesensor(LEFT) == 1):
    bitbot.spinms(RIGHT, 10, 1)
else:
    bitbot.go(FORWARD, 50)

Sonar

# Stop, reverse and spin the Bit:bot when it gets close to an object.
# The sonar() method returns the distance to the nearest object in cm.
bitbot.go(FORWARD, 50)
if bitbot.sonar() < 20:
    bitbot.stop()
    bitbot.goms(REVERSE, 50, 700)
    bitbot.spinms(RIGHT, 50, 200)