Complete Program：
Select “ JavaScript" and“Python”to switch into JavaScript and Python
language code:
Code Description：
Upload the code 1, plug in micro:bit via USB cable.
As the button A is pressed, LED dot matrix indicates that “TILT TO FILL
SCREEN”then enter the calibration interface. The calibration method:
rotate the micro:bit to make LED dot matrix draw a square (25 LEDs are on),
as shown in the following figure:
①“on start”: command block only runs once
to start program.
②Calibrate compass
③Press button A on Micro:bit main board
④ Dot matrix shows the direction of compass
heading
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