Keyestudio Micro:bit Mini Smart Robot Car Manual page 88

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4) Test Result
Send the test code to micro:bit main board, then insert the micro:bit main board into the car shield and connect
a 18650 battery, turn the POWER switch ON.
When the front obstacle distance measured by ultrasonic sensor is greater than 10cm.
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 If detects an obstacle on the left side but not on the right side, the car will turn right at a certain angle then
go forward.
 If detects an obstacle on the right side but not on the left side, the car will turn left at a certain angle then
go forward.
 If detects no obstacle at both sides, the car will go forward.
 If detects obstacles at both sides, the car will stop, passive buzzer will produce an audible beep, after
500ms, robot car goes backward, after 200ms, turns left at a certain angle and then goes forward.
When the front obstacle distance measured by ultrasonic sensor is less than or equal to 10cm, the car will
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stop, passive buzzer will produce an audible beep, after 500ms, robot car goes backward, after 200ms, turns left at
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