SampleCode
#include "Arduino.h"
/*
Trig: Measurement trigger pin - Low level pulse over 50us triggers one dista
nce measurement.
Holding this pin LOW will repeats the measurement every 100ms.
*/
#define TRIGGER 2
/*
OUT: analog output 0.33mV equals 1mm
*/
#define ANALOG 1
void setup()
{
pinMode(TRIGGER, OUTPUT);
digitalWrite(TRIGGER, HIGH);
Serial.begin(9600);
}
void loop()
{
// generate the pulse to trigger the sensor
digitalWrite(TRIGGER, LOW);
delayMicroseconds(50);
digitalWrite(TRIGGER, HIGH);
delayMicroseconds(50);
unsigned int distance = analogRead(ANALOG); //read the analog pin
distance = (unsigned int)(((unsigned long)distance * 5000)/1024); //change
from analog value to voltage
distance = (unsigned int)((float)distance / 0.33f); //0.33mV equals 1mm
