#define ECHO_pin 3
#define TRIG_pin 2
#define pinBuzzer 9
#include <Servo.h>
Servo myservo;
int rotasi = 90;
int interval = 0;
float readDistanceCM(){
digitalWrite(TRIG_pin, LOW);
delayMicroseconds(2);
digitalWrite(TRIG_pin, HIGH);
delayMicroseconds(10);
digitalWrite(TRIG_pin, LOW);
int duration = pulseIn(ECHO_pin, HIGH);
return duration*0.034/2;
}
void soundBuzzer(){
if(interval < 500){
tone(pinBuzzer, 600);
}
else if(interval > 500){
tone(pinBuzzer, 450, 800);
}
}
void setup() {
pinMode(TRIG_pin, OUTPUT);
pinMode(ECHO_pin, INPUT);
Serial.begin(9600);
pinMode(pinBuzzer, OUTPUT);
myservo.attach(10);
myservo.write(90);
}
void loop() {
tutupPalang();
interval += 100;
if(interval > 1000) interval = 0;
}
void tutupPalang() {
float jarak = readDistanceCM();
if(jarak > 0 && jarak < 200) {
soundBuzzer();
tutup();
}
else{
buka();
noTone(pinBuzzer);
}
}
void tutup(){
if(rotasi <= 90){
myservo.write(rotasi);
delay(100);
rotasi+=4;
}
if(rotasi >= 90) rotasi = 90;
}
void buka(){
if(rotasi <= 90){
myservo.write(rotasi);
delay(100);
rotasi+=4;
}
if(rotasi >= 90) rotasi = 90;
}