40 lines
1.5 KiB
Arduino
40 lines
1.5 KiB
Arduino
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// ---------------------------------------------------------------- //
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// Arduino Ultrasoninc Sensor HC-SR04
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// Re-writed by Arbi Abdul Jabbaar
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// Using Arduino IDE 1.8.7
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// Using HC-SR04 Module
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// Tested on 17 September 2019
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// ---------------------------------------------------------------- //
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#define echoPin 2 // attach pin D2 Arduino to pin Echo of HC-SR04
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#define trigPin 3 //attach pin D3 Arduino to pin Trig of HC-SR04
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// defines variables
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long duration; // variable for the duration of sound wave travel
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int distance; // variable for the distance measurement
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void setup() {
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pinMode(trigPin, OUTPUT); // Sets the trigPin as an OUTPUT
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pinMode(echoPin, INPUT); // Sets the echoPin as an INPUT
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Serial.begin(9600); // // Serial Communication is starting with 9600 of baudrate speed
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Serial.println("Ultrasonic Sensor HC-SR04 Test"); // print some text in Serial Monitor
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Serial.println("with Arduino UNO R3");
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}
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void loop() {
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// Clears the trigPin condition
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digitalWrite(trigPin, LOW);
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delayMicroseconds(2);
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// Sets the trigPin HIGH (ACTIVE) for 10 microseconds
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digitalWrite(trigPin, HIGH);
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delayMicroseconds(10);
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digitalWrite(trigPin, LOW);
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// Reads the echoPin, returns the sound wave travel time in microseconds
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duration = pulseIn(echoPin, HIGH);
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// Calculating the distance
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distance = duration * 0.034 / 2; // Speed of sound wave divided by 2 (go and back)
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// Displays the distance on the Serial Monitor
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Serial.print("Distance: ");
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Serial.print(distance);
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Serial.println(" cm");
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}
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