This is a self-driving vehicle version of Lego Mindstorm Robot Inventor's MVP platform. It measures distance with the ultrasonic distance sensor.
If it detects an object within 40 cm, then it backs up and measures the distance that the sensor angles, -90 degrees and +90 degrees, indicates. It turns toward the direction with the maximum distance (I said minimum in the recording which is wrong!).
While the robot is moving straight, it scans the surrounding from about -45 degrees to +45 degrees in the front. The reason is that the ultrasonic sensor cannot measure the distance of an object in the oblique angle.
Later, I will upload the tutoring video which show how the software has been progr...