PitHCSR04

L'utilizzo del sensore ad ultrasuoni HC-SR04.

Prova del Sensore

Cosa serve:

• Sensore ad ultrasuoni HC-SR04
• cavetti

Codice sorgente:

//Adapted from David A. Mellis' code for Ping sensor
const int trigPin = 7;
const int echoPin = 4;

void setup() {
  // initialize serial communication:
  Serial.begin(9600);
  pinMode(trigPin,OUTPUT);
  pinMode(echoPin,INPUT);
}

void loop()
{
  long duration, inches, cm;

  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(5);
  digitalWrite(trigPin, LOW);


  duration = pulseIn(echoPin, HIGH);

  Serial.print(trigPin);
  Serial.print(" trigPin, ");
  Serial.print(echoPin);
  Serial.print(" echoPin, ");
  Serial.print(duration);
  Serial.print(" duration, ");
  //Serial.println();



  // convert the time into a distance
  inches = microsecondsToInches(duration);
  cm = microsecondsToCentimeters(duration);
  
  Serial.print(inches);
  Serial.print("in, ");
  Serial.print(cm);
  Serial.print("cm");
  Serial.println();
  
  delay(1000);
}

long microsecondsToInches(long microseconds)
{
  // According to Parallax's datasheet for the PING))), there are
  // 73.746 microseconds per inch (i.e. sound travels at 1130 feet per
  // second).  This gives the distance travelled by the ping, outbound
  // and return, so we divide by 2 to get the distance of the obstacle.
  // See: http://www.parallax.com/dl/docs/prod/acc/28015-PING-v1.3.pdf
  return microseconds / 74 / 2;
}

long microsecondsToCentimeters(long microseconds)
{
  // The speed of sound is 340 m/s or 29 microseconds per centimeter.
  // The ping travels out and back, so to find the distance of the
  // object we take half of the distance travelled.
  return microseconds / 29 / 2;
}

Scarica tutto quello che serve:

ZappocoS, 7 febbraio 2018