//A SOFIYUL FUADIKA 01 XI TEI 1
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
// Inisialisasi LCD I2C
LiquidCrystal_I2C lcd(0x27, 16, 2);
// Jika tidak tampil, coba ganti 0x27 jadi 0x3F
// Ultrasonic
const int trigPin = 3;
const int echoPin = 2;
// LED
const int ledMerah = 4;
const int ledHijau = 5;
long waktu;
int jarak;
void setup() {
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
pinMode(ledMerah, OUTPUT);
pinMode(ledHijau, OUTPUT);
lcd.init();
lcd.backlight();
lcd.setCursor(0,0);
lcd.print("Sensor Jarak");
Serial.begin(9600);
}
void loop() {
// Trigger Ultrasonic
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
// Baca Echo
waktu = pulseIn(echoPin, HIGH);
jarak = waktu * 0.034 / 2;
// Tampilkan ke LCD
lcd.setCursor(0,1);
lcd.print("Jarak: ");
lcd.print(jarak);
lcd.print(" cm ");
// Logika LED
if (jarak < 15) {
digitalWrite(ledMerah, HIGH);
digitalWrite(ledHijau, LOW);
} else {
digitalWrite(ledMerah, LOW);
digitalWrite(ledHijau, HIGH);
}
delay(500);
}