SENSORS AND DATA

Maqueen Robot: Parking Sensors Activity

In this activity, you'll create a parking sensor simulation using the Maqueen robot's ultrasonic sensor.
The robot will change its underglow color and beep based on its distance from objects.

Here's a basic structure for your program:

from microbit import *

from maqueenplusv2 import *
import music

init_maqueen()

# Define your distance thresholds here

while True:

    # Measure distance

    distance = rangefinder()

    # Your code here:

    # 1. Determine colour based on distance

    # 2. Set underglow colour

    # 3. Control beeping based on distance

    # Add a short delay

    sleep(100)

Understanding Distance Measurements

First, let's see what kind of values we get from the ultrasonic sensor:

from microbit import *

from maqueenplusv2 import *
import music

init_maqueen()

while True:

    distance = rangefinder()

    print(distance)

    sleep(100)

Run this code and observe the values. Move objects closer to and farther from the sensor. What range of values do you see?

Setting Underglow Colour

The set_underglow(color) function sets all 4 underglow lights. Colours are specified as hexadecimal values.
Here are some examples:

• Green: 0x00FF00

• Orange: 0xFFA500

• Red: 0xFF0000

Try setting the underglow to different colors based on distance thresholds you define.