Keyestudio 4WD Manual page 178

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(4)Test Results 1:
After uploading test code to micro:bit main board V2 and powering the
board via the USB cable, the LED dot matrix displays pattern when
" "
you claps and pattern when it is quiet around.(How to download?
How to quick download?)
Code 2:
The route to get test code（How to load?）
178