Create ultrasonic.ino

ultrasonic.ino

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+/*
+* Ultrasonic Sensor HC-SR04 and Arduino Tutorial
+*
+* by Dejan Nedelkovski,
+* www.HowToMechatronics.com
+*
+*/
+
+// defines pins numbers
+const int trigPin = 9;
+const int echoPin = 10;
+
+// defines variables
+long duration;
+int distance;
+
+void setup() {
+pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
+pinMode(echoPin, INPUT); // Sets the echoPin as an Input
+Serial.begin(9600); // Starts the serial communication
+}
+
+void loop() {
+// Clears the trigPin
+digitalWrite(trigPin, LOW);
+delayMicroseconds(2);
+
+// Sets the trigPin on HIGH state for 10 micro seconds
+digitalWrite(trigPin, HIGH);
+delayMicroseconds(10);
+digitalWrite(trigPin, LOW);
+
+// Reads the echoPin, returns the sound wave travel time in microseconds
+duration = pulseIn(echoPin, HIGH);
+
+// Calculating the distance
+distance= duration*0.034/2;
+
+// Prints the distance on the Serial Monitor
+Serial.print("Distance: ");
+Serial.println(distance);
+}