Keyestudio KS4028 Manual page 287

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(5)Test Results:
Upload the test code to the micro:bit, plug in power, dial the DIP switch to
ON and press " 1 " on the rocket switch. The micro:bit will show smile
expression, the servo will rotate 0°~45°~90°~135°~180°~0°，in loop way.
(How to download? How to quick download?)
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