#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const int potPin = A0;
const int ledRedPin = 2;
const int ledYellowPin = 3;
const int ledGreenPin = 4;

void setup() {
  Serial.begin(115200);
  pinMode(ledRedPin, OUTPUT);
  pinMode(ledYellowPin, OUTPUT);
  pinMode(ledGreenPin, OUTPUT);

  lcd.begin(16, 2);
  lcd.backlight();
}

void loop() {
  int potValue = analogRead(potPin);

  Serial.println(potValue);

  potValue = analogRead(potPin);

  if  (potValue >= 0 && potValue <= 341) {
    digitalWrite(ledRedPin, HIGH);
    digitalWrite(ledYellowPin, LOW);
    digitalWrite(ledGreenPin, LOW);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("led green on");
    lcd.setCursor(0, 1);
    lcd.print("Value: ");
    lcd.print(potValue);


  }
  if (potValue >= 342 && potValue <= 682) {
    digitalWrite(ledRedPin, LOW);
    digitalWrite(ledYellowPin, HIGH);
    digitalWrite(ledGreenPin, LOW);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("led yellow on");
    lcd.setCursor(0, 1);
    lcd.print("Value: ");
    lcd.print(potValue);
  }
  if (potValue >= 683 && potValue <= 1023) {
    digitalWrite(ledRedPin, LOW);
    digitalWrite(ledYellowPin, LOW);
    digitalWrite(ledGreenPin, HIGH);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("led red on");
    lcd.setCursor(0, 1);
    lcd.print("Value: ");
    lcd.print(potValue);
  }


  // Tunggu sebentar sebelum membaca nilai berikutnya
  delay(100);
}