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30 lines
664 B
30 lines
664 B
5 years ago
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#define trigPin A1
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#define echoPin A0
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void setup() {
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Serial.begin (9600);
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pinMode(trigPin, OUTPUT);
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pinMode(echoPin, INPUT);
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}
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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(2); // Added this line
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digitalWrite(trigPin, HIGH);
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// delayMicroseconds(1000); - Removed this line
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delayMicroseconds(10); // 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 >= 1000 || 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(250);
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}
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