arduino_bulb_ultrasonic_sensor.cc

arduino_bulb_ultrasonic_sensor.cc

const int pingPin = 13;
int inPin = 12;
int bulbZone = 5;
int bulbLed = 3, redLed = 2;
void setup() {
  Serial.begin(9600);
}
void loop()
{
  long duration, cm;
  pinMode(pingPin, OUTPUT);
  pinMode(bulbLed, OUTPUT);
  pinMode(redLed, OUTPUT);  
 
  digitalWrite(pingPin, LOW);
  delayMicroseconds(2);
  digitalWrite(pingPin, HIGH);
  delayMicroseconds(5);
  digitalWrite(pingPin, LOW);
  pinMode(inPin, INPUT);
  duration = pulseIn(inPin, HIGH);
  cm = msCms(duration);
  Serial.print(cm);
  Serial.print("cm");
  Serial.println();
  if (cm > bulbZone)
  {
    digitalWrite(bulbLed, HIGH);
    digitalWrite(redLed, LOW);
  }
  else
  {
    digitalWrite(redLed, HIGH);
    digitalWrite(bulbLed, LOW);
  }
 
  delay(100);
}
 
long msCms(long microseconds)
{
  return microseconds / 29 / 2;
}