61 lines
1.1 KiB
Text
61 lines
1.1 KiB
Text
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/*
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A (neat) cheat way of getting the HC-SR04 distance sensor working on an Arduino Uno
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put it in the end, with the GND aligned with the GND pin next to pin 13 and AREF
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This example code is in the public domain.
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*/
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// Pin 13 has an LED connected on most Arduino boards.
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// give it a name:
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//int led = 13;
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int echopin = 13;
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int trigpin = 12;
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int vcc = 11;
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// the setup routine runs once when you press reset:
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void setup() {
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pinMode(echopin, INPUT);
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pinMode(trigpin, OUTPUT);
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pinMode(vcc, OUTPUT);
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digitalWrite(vcc, HIGH);
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Serial.begin(9600);
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}
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// the loop routine runs over and over again forever:
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void loop() {
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long duration, distance;
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digitalWrite(trigpin, LOW); // Added this line
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delayMicroseconds(4); // Added this line
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digitalWrite(trigpin, HIGH);
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delayMicroseconds(20); // Added this line
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digitalWrite(trigpin, LOW);
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duration = pulseIn(echopin, HIGH);
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distance = (duration/2) / 29.1;
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if (distance >= 200 || distance <= 0){
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Serial.println("Out of range");
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}
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else {
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Serial.print(distance);
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Serial.println(" cm");
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}
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delay(500);
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}
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