Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 65 - Ai Robogenius
P. 65

    Here’s an explanation of the code you created:

                        int  Distance  = 0: Declares a variable to store the calculated distance from the ultrasonic
                        sensor, initially set to 0.
                        long readUltrasonicDistance(int triggerPin, int echoPin): A custom function that reads the
                        ultrasonic sensor's echo time to calculate the distance.

                        pinMode(triggerPin, OUTPUT): Sets the trigger pin to OUTPUT to send a pulse.
                        digitalWrite(triggerPin, LOW): Clears the trigger pin to ensure a clean start.

                        delayMicroseconds(2): Waits for 2 microseconds to ensure proper timing.
                        digitalWrite(triggerPin, HIGH): Sends a pulse to trigger the ultrasonic sensor.

                        delayMicroseconds(10): Waits for 10 microseconds before turning off the trigger.

                        digitalWrite(triggerPin, LOW): Turns off the trigger pin.
                        pinMode(echoPin, INPUT): Sets the echo pin to INPUT to listen for the reflected sound.

                        return pulseIn(echoPin, HIGH): Measures the time it takes for the sound to travel back and
                        returns the pulse duration in microseconds.
                        void setup(): A built-in function that runs once at the start to initialise the serial communication
                        and pin modes.

                        Serial.begin(9600): Starts serial communication at a baud rate of 9600 for debugging.
                        pinMode(4, OUTPUT): Sets pin 4 as an output to control the Piezo buzzer.

                        void loop(): Continuously runs after setup() to measure distance and control the Piezo buzzer.
                        Distance = 0.01723 * readUltrasonicDistance(2, 3): Calculates the distance using the time it
                        took for the pulse to travel and converts it to centimeters.

                        if (Distance < 60): If the distance is less than 60 cm, the object is too close.
                        Ÿ  Serial.println("The object is too close!"): Prints a message to the serial monitor indicating
                            the object is too close.

                        Ÿ  digitalWrite(4, HIGH): Turns ON the Piezo buzzer to alert the user.

                                                                         Getting Started with Arduino in Tinkercad
                                                                                                                        63

| 60 61 62 63 64 65 66 67 68 69 70 |