Playing Ultrasonic sensor with Arduino

Playing Ultrasonic sensor with Arduino


1. The Connection

2. The script

#define echopin 3
#define TRIGPIN 2

void setup()
{
  Serial.begin (9600);
  pinMode (echopin,INPUT);
  pinMode (TRIGPIN, OUTPUT);
}
void loop()

{ digitalWrite(TRIGPIN,LOW);
delayMicroseconds(2);
digitalWrite(TRIGPIN,HIGH);
delayMicroseconds(10);
digitalWrite(TRIGPIN,LOW);

float distance = pulseIn(echopin,HIGH);
distance = distance/46;
Serial.print (distance);
Serial.println (" cm");
if (distance < 10)
{
Serial.print("AWAS HATI-HATI");
Serial.println (" Jarak kurang dari 10 cm");
}
else if
 (distance < 20)
{
Serial.print("Waspada");
Serial.println (" Jarak kurang dari 20 cm");
}
else
{
  Serial.println ("Jarak Masih Aman");

}
delay (200);
}