//nama : BINTANG KESUMA MAHARDIKA
//kelas : XII RPL B
//tanggal : 30 juli 2024

#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

int red = 2;
int yellow = 3;
int green = 4;
int potensio = A0;

//-------------------------setup--------------------------
void setup() {
  Serial.begin(115200);
  pinMode(potensio, INPUT);
  pinMode(red, OUTPUT);
  pinMode(yellow, OUTPUT);
  pinMode(green, OUTPUT);
  lcd.init();
  lcd.backlight();
}

//------------------------loop-----------------------------
void loop() {
  int potValue = analogRead(potensio);  // Membaca nilai potensiometer
  
  // Mencari tahu di range mana nilai potensiometer
  if (potValue >= 0 && potValue <= 341) {
    digitalWrite(yellow, HIGH);   // LED kuning menyala
    digitalWrite(red, LOW);       // LED merah mati
    digitalWrite(green, LOW);     // LED hijau mati
    lcd.setCursor(0,0); 
    lcd.print(" Status = KUNING ");
    lcd.print("                 ");
    lcd.setCursor(0,1);  
    lcd.print(" Value = ");
    lcd.print(potValue);
    lcd.print("         ");
  } else if (potValue >= 342 && potValue <= 682) {
    digitalWrite(yellow, LOW);    // LED kuning mati
    digitalWrite(red, HIGH);      // LED merah menyala
    digitalWrite(green, LOW);     // LED hijau mati
    lcd.setCursor(0,0); 
    lcd.print(" Status = MERAH ");
    lcd.setCursor(0,1);  
    lcd.print(" Value = ");
    lcd.print(potValue);
    lcd.print("         ");
  } else if (potValue >= 683 && potValue <= 1023) {
    digitalWrite(yellow, LOW);    // LED kuning mati
    digitalWrite(red, LOW);       // LED merah mati
    digitalWrite(green, HIGH);    // LED hijau menyala
    lcd.setCursor(0,0); 
    lcd.print(" Status = HIJAU ");
    lcd.setCursor(0,1);  
    lcd.print(" Value = ");
    lcd.print(potValue);
    lcd.print("         ");
  }
}