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Hello, after installing a battery in the car, the motor still can’t be controlled to rotate by burning program while the power light is on?
Perhaps the battery is dead, and it is recommended to replace it with a fully charged one. When the battery voltage is lower than 2V, the LED on the board and other functions can work normally, but the motor can’t rotate due to insufficient power.
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In ultrasonic wave test, there is 0 value appearing?
A constraint condition should be added for test barrier, that is, filter out the data when the distance is not 0 or less than 5. You can also add 100-millisecond delay to prevent multiple reflections.
