const int pinT = 9;
const int pinE = 8;

const int LEDR = 4;
const int LEDG = 5;

const int LDR = 7;

const int buzzer = 6;

#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
void setup() {
  //LCD
  lcd.init();
  lcd.backlight();

 // Display names on the LCD
  lcd.setCursor(0, 0);
  lcd.print("UAS_Embedded System");
  lcd.setCursor(0, 1);
  lcd.print("Dosen: Rudi H,MT");

  delay(3000); // Display for 3 seconds

  lcd.clear();

   // Display names on the LCD
  lcd.setCursor(0, 0);
  lcd.print("Mahasiswa:DIga Afrian");
  lcd.setCursor(0, 1);
  lcd.print("NIM:1083232129");

  delay(3000); // Display for 3 seconds

  lcd.clear();

   //ULTRASONIK 
  pinMode(pinT, OUTPUT);
  pinMode(pinE, INPUT);
  Serial.begin(9600);
   
   //LDR
  pinMode(LDR, INPUT );

   //LAMPU
  pinMode(LEDR, OUTPUT);
  pinMode(LEDG, OUTPUT);

   //BUZZER
  pinMode(buzzer, OUTPUT);
}

void loop() {
  //ultrasonik 
  int waktu, jarak;
    digitalWrite(pinT, LOW);
    delayMicroseconds(2);
    digitalWrite(pinT, HIGH);
    delayMicroseconds(10);
    digitalWrite(pinT, LOW);

    waktu = pulseIn(pinE,HIGH);
    jarak = (waktu/2)/29.1;

    Serial.print("Jarak : ");
    Serial.print(jarak);
    Serial.println(" cm");
  
  //LDR
  int nSensor = digitalRead(LDR);
  //JIKA JARAK SAMA DENGAN 10 ATAU DIBAWAH 10 FUNGSI INI BERFUNGSI
  if(jarak <= 10){ 
    //lampu
    digitalWrite(LEDG, HIGH);
    digitalWrite(LEDR, LOW);
    //JIKA GELAP MAKA INI YANG BEKERJA
    if(nSensor == 0){
     lcd.setCursor(0,0);
     lcd.print("Sampah");
     lcd.setCursor(3,1);
     lcd.print("Organik          ");

     digitalWrite(buzzer, HIGH);}
     
    //JIKA TERANG FUNGSI INI YANG BEKERJA
    else {
    lcd.setCursor(0,0);
    lcd.print("Sampah");
    lcd.setCursor(3,1);
    lcd.print("Anorganik");

    digitalWrite(buzzer, HIGH);
    }
  
  }
  //JIKA JARAK DIATAS 10 MAKA FUNGSI INI YANG BEKERJA 
  else{
    lcd.clear();

    digitalWrite(buzzer, LOW);
  
    digitalWrite(LEDR, HIGH);
    digitalWrite(LEDG, LOW);
  }
}