#include <Arduino.h>

const int lm35Pin = 15;
const int greenLedPin = 19;
const int yellowLedPin = 18;
const int redLedPin = 5;

void setup() {
  pinMode(greenLedPin, OUTPUT);
  pinMode(yellowLedPin, OUTPUT);
  pinMode(redLedPin, OUTPUT);
  pinMode(lm35Pin, INPUT);
  Serial.begin(9600);
}

void loop() {
  float temperature = getTemperature();

  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");

  if (temperature <= 27) {
    digitalWrite(greenLedPin, HIGH);
    digitalWrite(yellowLedPin, LOW);
    digitalWrite(redLedPin, LOW);
  } else if (temperature > 27 && temperature < 29) {
    digitalWrite(greenLedPin, LOW);
    digitalWrite(yellowLedPin, HIGH);
    digitalWrite(redLedPin, LOW);
  } else if (temperature >= 29 && temperature < 32) {
    digitalWrite(greenLedPin, LOW);
    digitalWrite(yellowLedPin, LOW);
    digitalWrite(redLedPin, HIGH);
  } else if (temperature >= 32) {
    digitalWrite(greenLedPin, LOW);
    digitalWrite(yellowLedPin, LOW);
    digitalWrite(redLedPin, HIGH);
    delay(50);
    digitalWrite(redLedPin, LOW);
    delay(50);
  } else {
    digitalWrite(greenLedPin, LOW);
    digitalWrite(yellowLedPin, LOW);
    digitalWrite(redLedPin, HIGH);
  }

  delay(1000); 
}

float getTemperature() {
  int rawValue = analogRead(lm35Pin);
  float voltage = (rawValue / 4095.0) * 3.3; // Konversi nilai ADC ke tegangan (0-3.3V)
  float temperature = (voltage - 0.5) * 100.0; // Konversi tegangan ke suhu dalam derajat Celsius
  return temperature;
}