#define ECHO_PIN 3
#define TRIG_PIN 2
#define pinBuzzer 5
#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, 250);
}else
if(interval > 500){
tone(pinBuzzer, 100,800);
};
}
void setup() {
// put your setup code here, to run once:
pinMode(TRIG_PIN, OUTPUT);
pinMode(ECHO_PIN, INPUT);
Serial.begin(115200);
pinMode(pinBuzzer, OUTPUT);
myservo.attach(9);
myservo.write(90);
}
void loop() {
// put your main code here, to run repeatedly:
tutupPalang();
interval +=100;
if(interval>1000) interval = 0;
}
void tutupPalang(){
float jarak = readDistanceCM();
if(jarak > 0 && jarak < 100 ){
soundBuzzer();
tutup();
}else{
buka();
noTone(pinBuzzer);
}
}
void tutup(){
if(rotasi <= 90){
myservo.write(rotasi);
delay(100);
rotasi--;
}
if(rotasi <= 0 ) rotasi = 0;
}
void buka(){
if(rotasi <= 90){
myservo.write(rotasi);
delay(100);
rotasi+=4;
}
if(rotasi >= 90 ) rotasi = 90;
}