Next Iteration Script and Test

Ask for Script Tuning

• Examine the conversation below about the way the AI was instructed to tune the script.
• Enter the new script below into the micro:bit Python Editor.
• Use the Send to micro:bit button to load the script into the micro:bit.

User

Nice work.  I think it just needs a little tuning now.  Specifically, it points at 6 anywhere between 7 and 6.  It should really point at 6 while it’s anywhere from half way between 5 and 6, and half way between 6 and 7.  

ChatGPT

Certainly, we can add a slight adjustment to the hour position calculation to achieve the desired behavior. The updated script below includes this adjustment:

from microbit import *
from math import atan2

def get_rotation_angle():
    # Get the accelerometer readings
    x, y, z = accelerometer.get_values()

    # Calculate the rotation angle with an offset
    angle = atan2(y, x) * (180 / 3.14159) + 90

    # Ensure the angle is positive
    angle = (angle + 360) % 360

    return angle

def display_clock_hand(angle):
    # Calculate the adjusted hour position
    adjusted_hour_position = round(angle / 30)

    # Map the adjusted hour position to the range [0, 11]
    hour_position = adjusted_hour_position % 12

    # Display the clock hand
    display.show(Image.ALL_CLOCKS[hour_position])

while True:
    # Get the rotation angle
    rotation_angle = get_rotation_angle()

    # Display the downward direction as a clock hand
    display_clock_hand(rotation_angle)

    # Optional: You can add a sleep time to avoid rapid updates
    sleep(100)

In this version, the adjusted_hour_position is calculated by rounding the angle divided by 30. This adjustment should make the pointer point at 6 while it’s halfway between 5 and 6, and halfway between 6 and 7. Please give it a try, and let me know if it meets your expectations!

Tests

• Run the script and tilt the micro:bit.
• Compare the way this script behaves against the one from the previous Try an Existing Tilt Compass App.
  • Do they match functionally?
  • Do they match statement-by-statement, and does that matter?

How This Iteration Works

The intended solution added 15 degrees to the measurement with needle = ( angle + 90 + 15 ) // 30.  The AI used a different approach.  It used Python’s round function to achieve the same goal.