Rice Field Midges Prototype

#define trig 3
#define echo 4
#define buzzer 7
int durasi, jarak;
#include <Servo.h>
Servo myservo;
int pos = 0;

void setup() {
pinMode(trig, OUTPUT); //set pin trig menjadi OUTPUT
pinMode(echo, INPUT);
pinMode (buzzer, OUTPUT);
Serial.begin(9600); //digunakan untuk komunikasi Serial dengan komputer
myservo.attach(9);
}

void loop() {
//program dibawah ini agar trigger memancarakan suara ultrasonic
//digitalWrite(trig, LOW);
//delayMicroseconds(8);
digitalWrite(trig, HIGH);
delayMicroseconds(8);
digitalWrite(trig, LOW);
delayMicroseconds(8);

durasi= pulseIn(echo, HIGH); //menerima suara ultrasonic
//jarak= (durasi/2) / 30; //mengubah durasi menjadi jarak (cm)
Serial.println(jarak); //menampilkan jarak pada Serial Monitor
//durasi= pulseIn(echo, HIGH);
jarak= (durasi/2) / 29.1;
if(jarak<=30 ) {
Serial.print(jarak);
Serial.print(" cm");
Serial.print(" ");
Serial.println("Ada Gerakan");
digitalWrite(buzzer, HIGH);
delay(100);
for(pos = 0; pos < 90; pos += 1)
{
myservo.write(pos);
delay(2);
}
for(pos = 90; pos >=1; pos -= 1)
{
myservo.write(pos);
delay(2);
}
}
else {
//Serial.print(jarak);
//Serial.print(" cm");
//Serial.print(" ");
//Serial.println("Tidak Gerakan");
digitalWrite(buzzer, LOW);
delay(100);}
}