Keyestudio KS4028 Manual page 147

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After that, a smile pattern appears, which implies the calibration is
done. When the calibration process is completed, pressing the button A
will make the magnetometer reading display directly on the screen. And
the direction north, east, south and west correspond to 0°, 90°, 180° and
270° respectively.
(6)Test Code 2:
The route to get test codes（How to load?）
File Route File Name
Type
Hex KS4027 folder/Makecode Project 6：
147